Home

Study Guide for Registered Technician

Contents

1. 0 5 3 11 20 2011 9 of 70 Clean and repack wheel bearings Inspect suspension and brake system 72 Perform pre delivery inspection a Check propane systems pressure drop test regulator lock up test system operating pressure test b Pretest all appliances and accessories Test and inspect AC electrical system hot skin test polarity test voltage test Test and inspect DC electrical system Check safety items Check and lubricate doors Check exterior lights Check window roof molding seals Check interior lights Check wiper blades Visually inspect fluid levels Service batteries Inspect belts and hoses Visually inspect chassis Check lug nuts and tire pressure Test water supply and drainage systems Test drive 73 Demonstrate effective customer relations skills Act courteously Listen carefully Use effective communication techniques Empathize with customer Ask direct questions Build trust and rapport Explain plan of action Provide RV orientation and instructions Use protective coverings Provide helpful hints Ensure follow up Test drive with customer Return replaced parts to customer 74 Perform recordkeeping tasks Record consumer complaint concern Record registration and warranty forms Complete personne
2. 59 Appendix 1 Sign off Sheets RVIA 11 20 2011 Study Guide for Registered RV Service Technician Test Compiled by the Recreation Vehicle Industry Association Overview The purpose of this Study Guide is to help the Recreation Vehicle RV Service Technician prepare to take and pass the RVIA RVDA Registered RV Service Technician Test Note The Registered RV Service Technician is a Recreational Vehicle Industry registration It does not constitute licensing or permission to perform any function or task controlled by state or local regulations Technicians are required to meet all state and local requirements before performing any regulated tasks What is an RV Service Technician Recreation vehicles have come a long way since the early days of the RV Industry especially in the technical sense So much so it takes training dedication and the command of specialized skills to become a successful RV service technician Today s service technician must acquire and apply intelligent troubleshooting skills covering the vast amount of technical equipment found within a wide range of recreation vehicle types In addition a qualified RV service technician must be proficient with a variety of hand and powered tools and have the ability to read understand implement and install numerous accessories and add on components common to the RVing lifestyle Performing proper and complete preventive mainten
3. OSU 25 8 126 658 23 4 2 634 103 4 19 608 078 I o 3 8 4 33 8 3 738 use 3 2 35 8 758 ey 11578 33 4 tafe aa 37 8 181 gt 41 8 4 8 1248 2 aa sya 43 8 4 838 84 12383 124 1 29 30 31 32 RVIA 11 20 2011 53 of 70 261 new tank a float type 80 prevention device does not appear to be accepting propane the technician should first A check the outage valve B oil the valve plunger C check the valve for the correct position D manually operate the plunger 262 In transferring propane from one container to another the receiving container must be A purged B smaller C different type D a different color 263 When transferring propane from one container to another it is recommended that a technician wear all of the following except protective eye wear B heavy gloves C protective footwear D respirator 264 Propane needs what percent of vapor in an air gas mixture to ignite A 10 2 and 15 3 B 76 1 and 78 3 2 15 and 9 6 D 0 025 and 0 096 265 A manometer is an instrument used to measure utility water pressure B tire pressure C low pr
4. 11 20 2011 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 C C C0 C 0 gt C C CC C gt gt gt gt 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 C C gt 0 gt gt 5C 0 gt C C C C C 0 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 gt gt 60 70 Appendix 1 Signoff Sheets Time Propane Pressure Drop Test Sign Off Sheet Printed Technician Name ID Number Address Telephone Number City State Zip Code Time Pressure Drop Test Conducted at the Range STEP Initials Date Did the Candidate Prepare document work order PDI form etc to record time pressure drop test results Ensure the temperature of both air and piping was approximately the same Ensure a uniform temperature was maintained throughout the test procedure Ensure the propane system is turned off at the service valve Turn off the burner valves on the range and gas valves on other appliances Turn off all open pilot lights Turn propane system on at the service valve Listen to the regul
5. Did the candidate Ensure meter capacity is greater than expected amperage Set VOM to highest AC amps scale Turn off power to the circuit Disconnect the circuit at the point where the current is to be measured Install the VOM leads in series between the source of current and the device being measured Turn on the power to the device being measured Switch the VOM scale to the lowest safe range Read the indicated current Turn off power to the circuit Return the circuit to its original condition Accurately diagnose and repair problems if any exist When using a clamp on meter Did the candidate Clamp the jaws of the meter around one of the conductors feeding power to a live electrical circuit or device Read the current draw in amperage Isolate the component from the circuit Set the ammeter to the proper amp scale Read results on the meter RVIA 11 20 2011 67 of 70 Sign off sheet revised June 23 2008 Appendix 1 Signoff Sheets Sign off sheet revised June 23 2008 STEP Initials Date Checking Continuity Did the candidate il Turn off all VAC power Isolate the component to be checked by disconnecting all the wires Set the VOM to the Ohms scale Place one probe on each terminal of the item to be checked Shorted Circuit 1 Two wires touching or a closed swit
6. 280 The most important action a technician can use when dealing with irate customers is listening to the customer explaining the dealers policies referring the customer to the service manager trying to calm the customer down gt 281 What is purpose of a CO detector A To detect Carbon and Oxygen levels inside the RV prevent injury by alerting occupants to dangerous levels of carbon monoxide inside the RV To meet current RV code requirements To prevent CO poisoning by alerting occupants to dangerous levels of carbon dioxide inside the RV B C D 282 Which item is typically not included on the pre delivery inspection checklist A Odometer reading B Color of the RV C Customer home telephone D None of the above 283 Purging an LP container ensures it does not contain air B water RVIA 11 20 2011 56 of 70 contaminated LP D All of the above 284 To avoid an unnecessary drain on the RV battery during a PDI and to check the condition of the converter the shore power cord should be connected to a 120 volt AC shop receptacle however before proceeding be sure to A test the converter output circuits B conduct a hot skin test C fully charge all batteries D disconnect the positive and negative conductors at the converter 285 Which receptacles must GFCI protected A Microwave and lavatory B AES refrigerator and kitchen C Bathroom and
7. 11 20 2011 30 of 70 kept confidential D used to justify the cost of repairs 108 The warranty registration form can be used as a checklist when delivering a new unit to educate the owner to record serial numbers for all of the above vow 109 The batteries used in most RV applications are A Lead carbon Steel carbon C Lead acid D Lithium acid 110 Using the 50V DC scale the correct meter reading is V DC 12 14 6 18 6p 70 1 FUSE amp DIODE wn IK PROTECTION 4 55 D 111 The voltage measure at V2 is DC RVIA 11 20 2011 31 of 70 gt ODO 2 112 With switch S1 closed voltage measured at V2 would be 113 properly measure current with a VOM in a DC circuit you must connect the VOM 2 RVIA 11 20 2011 32 of 70 in parallel with the source across the component in series with the source on the positive side gt 114 To protect the meter when doing an ohms test insure that the A meter is properly zeroed B meter is set on the proper scale C the circuit is de energized D meter has the correct polarity 115 Two 12V batteries connected in series provide VDC A 6 B 12 24 D 48 116 A gassing battery gives off sulfur oxide B oxygen C nitrogen D hydrogen 117 fully charged battery at
8. 120 VAC distribution panel board is isolated from each other wired together must be connected to ground rod never used 177 What is the current through a 4 7 ohm at 13 5 volts amps 2 9 amps 2 0 amps D 2 4 amps 178 At what voltage must a 30W soldering iron operate if it uses 35A A 245 ohms B 100 volts C 10 5 volts D 85 7 volts 179 Which of the below meters would NOT be contained in a multimeter A Voltmeter B Ohmmeter C Watt meter D Milliamp meter 180 When using a multimeter to measure voltage one should not observe polarity of meter probes start on the highest voltage scale insure meter function switch is set properly set on the highest ohm scale gt 181 safety precaution to observe when using an ohmmeter is isolate the circuit under test from the meter de energize the circuit under test observe polarity of test probes zero the meter gt 182 water pump runs continuously with the control relay de energized Which of the following is the most likely cause RVIA 11 20 2011 42 of 70 An open wire to the pump A shorted pump The switch remains open The switch remains closed gt 183 15 electrical pressure that moves electrons electrical flow opposition to electrical flow work being done gt 184 Resistance is A electrical pressure that moves
9. a toxic gas that has no odor taste or color an additive in ink paint and rubber gt 151 What type of battery is used in RV s 12V system Alkaline Lead Acid Nickel Cadmium Dry Cell gt 152 The voltage at V 1 is VDC A 0 B 6 9 12 153 With Switch 51 Open Voltage measured at V 2 would VDC RVIA 11 20 2011 38 of 70 gt 154 According to Ohm s law to find amperage you must multiply volts by resistance divide amps by resistance multiply volts by amps divide volts by resistance gt 155 Upon removing control panel you find a white red wire not connected To find the proper wire location you A Look for an unused connection B Check panel wiring diagram C Check printed circuit schematic D Leave it unconnected 156 To safely remove a battery from a vehicle the negative lead should be removed last first first only if convenient doesn t make a difference gt 157 1000 feet of 14 gauge wire whose temperature is 70 degrees has resistance that is 1000 feet of 10 gauge wire at the same temperature A equal to B larger than C less than D no difference 158 If the needle of a voltmeter gives a reverse reading you should A change to a higher voltage scale RVIA 11 20 2011 39 of 70 change to a lower voltage scale C reverse the test leads D voltmeter is defecti
10. causes immediate failure gt 193 Connecting batteries in series increases voltage increases current increases amp hour capacity causes immediate failure 194 The specific gravity of a fully charged lead acid battery is 1 285 1 265 1 225 1 155 195 Which type of battery is most often used for the chassis battery A Lead Acid Gelled Deep Cycle C Nickel Cadmium D Automotive 196 When you connect four 6V 200 amp DC batteries in series you will get A 6 VDC 200 amps 24 VDC 200 amps C 6VDC 800 amps 24 VDC 800 amps 197 When you connect four 6V 200 amp DC batteries in parallel you will get 6 VDC 200 amps 24 VDC 200 amps 6 VDC 800 amps 24 VDC 800 amps 198 A 10 3 non metallic sheathed cable consists of two hots black and red one neutral white and one ground bare or green B two hots black and blue one neutral white and one ground green RVIA 11 20 2011 44 of 70 two hots black and white one neutral white and one ground green D two hots black and red one neutral white and one ground brown 199 The amount of amperage that can be carried by a 10 gauge wire versus a 16 gauge wire is lower B higher C equal D not measurable 200 What minimum gauge wire should be used for a 30 amp circuit A 8 B 10 12 D 14 201 Which is not a type of electrical
11. distribution panel board intended for use in an RV A Attach strap or screw to panel B Discard strap or screw C Add electrical clamp harness D Attach strap or screw to ground 209 When installing a new 120 VAC receptacle when is a GFCI not required In a bathroom 6 feet from wet location C On the exterior of RV D 2 feet from a battery location 210 What occurs when two adjacent conductors make electrical contact and bypass a portion of a circuit A ground An open C A short D The circuit resistance increases 211 If the needle of a voltmeter deflects off scale to the left you should change to a higher voltage scale change to a lower voltage scale reverse the test leads replace the defective voltmeter gt 212 When using VOM to measure current always start at the lowest scale with the highest volt scale at the highest scale with the lowest ohm scale 213 Basic troubleshooting of the 120 VAC system does require the use of a polarity checker B galvanometer C multimeter D tester 214 Bonding clamps are designed and installed to A safely conduct current likely to be imposed between two metal parts act as fuseable link when installing electrical components RVIA 11 20 2011 46 of 70 create connection the load wire of two or more components D alternate route for load distrib
12. Propane Operating Pressure Test A 0 B 25 C 50 D 75 101 When burn testing an appliance a properly adjusted flame is blue with soft inner cone is blue with yellow orange core will make roaring sound as it burns has bright yellow tips 102 A hot skin test is performed to find electrical faults that cause circuit breakers to trip prevent annoying shocks from static electricity verify the proper amount insulation has been installed assure the RV user s safety Jow 103 When faced with an dissatisfied customer your best option is A to establish yourself as the expert B tell the customer whatever he wants to hear C listen to the customer D refer the customer to your supervisor or manager 104 Customers should always be respected agreed with treated with watchful caution made to feel they are always right gt 105 When listening to customer s problem you should treat them as a friend put yourself in their place empathize offer the cheapest solution explain why you or your dealership did not cause the trouble 106 Protective coverings should always be removed before returning the vehicle B used on the most expensive units C placed if your cloths or shoes are dirty D used when performing any service 107 Test results should always be A recorded on the repair order B handed directly to the customer RVIA
13. 325 If your interests and job functions are in specific areas of the technician career getting specialties may be the way to go Each specialty test carries a fee of 165 All 5 specialties must be achieved and held current for Master Certification status Recertification for each specialty costs 50 with 8 hours of continuing education credits in the specific area Once all 5 specialties are earned Master status is awarded pending time in service Not every technician s goal will be to achieve Master status The RV industry needs specialists in every category and those technicians that have a talent and an affinity for a specific specialty should develop those skills and become the best they can be in their chosen field Under these circumstances the specialty status will be more meaningful to the technician than attempting to achieve a Master status which includes expertise in areas outside of their interests One note is that a technician who begins on the specialty path can switch to the comprehensive path at any time and vice versa because the body of knowledge is the same If your goal is Master the knowledge requirements for the specialty path are in smaller bites for ease of learning Only the individual technician can decide for himself which is the best path to take In addition to ultimate career goals the technician must consider which testing method better fits his abilities either a larger one time comprehensive test or t
14. a properly sized and installed dip tube will extend into a propane DOT cylinder is A 20 B 40 60 D 80 249 Newer overfilling prevention devices for tanks have a piston assembly and that restricts the inlet fill capacity orifice B o ring C valve D baffle 250 An excess flow valve when activated the flow of propane A increases B improves C limits D stops 251 The acts as protection because it will severely restrict the propane flow when a propane line ahead of a regulator s is broken or opened service valve back flow valve excess flow valve fill valve gt 252 The device that closes when the liquid or vapor passing through it exceeds the prescribed rate of flow is called the excess flow valve service valve pressure relief valve backflow check valve gt 253 Flare fittings are designed to be used without RVIA 11 20 2011 51 of 70 Teflon tape thread wrap all of the above gt 254 The maximum distance in feet required between copper tubing supports is feet 255 The two types of brass flare nuts approved for use RVs forged and molded molded and stress relieved welded and forged forged and stress relieved gt 256 The number of threads iron pipe should be for use on propane manifold connectors installed on recreational vehicles approximately 10 bet
15. bedroom D All exterior kitchen and bath 286 While road testing a motorhome if you switch fuel tanks you must drive at least 3 miles after switching cover the entire route twice top off the main tank when finished Never switch tanks during the road test gt 287 Who or what fills the center position in the service triangle A Systems B People C Customer D Service Strategy 288 What percentage of unhappy customers will the average company never hear from A 50 B 65 7690 9590 289 How many customers with problems does the average company have for every complaint received 19 B 21 C 26 D 38 290 What percent of customers will do business with an organization again if a complaint is resolved quickly A 65 B 75 C 85 D 90 RVIA 11 20 2011 57 of 70 291 Which of the following is not one of the three keys to making the repair A Economics B Quickness C Correctness D Cleanliness 292 According to the TARP findings customers who have their problems resolved tell an average of how many people A 5 B 10 15 D 20 RVIA 11 20 2011 58 of 70 Answer Key 001 B 074 D 147 220 002 075 148 221 0 003 076 D 149 222 0 004 077 8 150 C 223 C 005 8 078 8 151 8 224 8 006 A 079 C 152 225 C 007 6 080 D 153 226 008 081 154 D 227 009 082 155 228 0 010
16. check list of what to study for the test It should be noted that the number of questions in each area may not equal the number of tasks listed Some of the tasks are complex and broad in scope and may be covered by several questions Other tasks are simple and narrow in scope and one question may cover several tasks The main objective in listing the tasks is to describe accurately what is done on the job not to make each task correspond to a particular test question The Core Standards Chart begins on page 5 Sample questions will follow Although these same questions will not appear on actual tests they are in the same format and cover the same topics as the actual test questions To be successful on the test you must know the Ohm s Watt s laws formulas and how to manipulate the equations This Study Guide provides some tips on how to use and remember Ohm s Law so you will never miss a single Ohm s Watt s law question or ever forget the formulas beginning on page 11 Propane Timed Pressure Drop and Lock up Tests and the Electrical Hot Skin test are also must know subjects Study the sign off sheets and memorize the procedures You will be tested on this see page 15 Finally there are a number of facts which you must remember if you are going to ace the test These facts which are generally represented by specific values have to be learned Unfortunately a technician cannot work out the answer by calculation or deductiv
17. electrons B electrical flow C opposition to electrical flow D electrical flow capacitance 185 Current is electrical pressure that moves electrons electron flow opposition to electrical flow electrical pressure that measures neutrons 186 The amperage draw 12 series circuit having two 8 ohm resistors would be 750 750mA 750 D 750 amps 187 When testing a good diode with an ohmmeter and then measuring this part again with the leads reversed you should have A two low readings B two high infinite readings C one high infinite and one low reading D this is an incorrect test 188 The amperage draw in a 12V series circuit with four 3 Ohm resistors would be 100mA 1mA C 1A D 0 1A 189 50 amp service provides one 120 volt line at 50 amps one 240 volt line at 50 amps two lines of 120 volts at 50 amps each two lines of 240 volts at 50 amps each gt 190 A clearance lamp circuit has 15 amp fuse installed What is the maximum draw that should be applied to that circuit RVIA 11 20 2011 43 of 70 A 15 amps B 12 amps 18 amps D 10 amps 191 The type of power produced by the oldest type of RV converter is 12 volts AC 12 volts pure DC 12 volts unfiltered DC 12 volts square wave 192 Connecting batteries in parallel increases voltage increases current increases amp hour capacity
18. emergency exit windows should be thoroughly cleaned B tested for proper operation C locked D checked for proper labeling 079 Frequently check smoke alarms for cleanliness insect nesting fresh batteries sufficient sound volume gt 080 What doe GVWR mean A General Vehicle Weather Rating B Gross Vehicle Weight Reserve C Government Vehicle Written Report D Gross Vehicle Weight Rating 081 The maximum permissible weight of the tow and towed vehicles is the GCWR B GVWR C MPWR D GAWR 082 The Cargo Carrying Capacity CCC label has been replaced by the A Federal Safety Label data plate B RVIA Certification Label C Occupant and Cargo Carrying Capacity OCCC Label D Gross Combination Weight Rating GCRW Label 083 To assure RV tires are properly inflated use a dial pressure gauge B weigh each wheel position C inflate tires immediately after use D inflate to maximum pressure as indicated on the sidewall RVIA 11 20 2011 27 of 70 084 Tire age can be determined by reading the DOT code on the tire sidewall consulting owners manual measuring the amount of remaining tread the manufacturer s serial number 085 Voids gaps and cracks are defects that be found when A inspecting exterior moldings seals and roofs B sealing water heater access panels C tires reach replacement age D inspecting filter element
19. incorrect sealant C condensation forming on the regulator diaphragm D 094 Three minutes is the recommend amount of time to complete a hot skin test minimum duration for a propane Time Pressure Drop Test required rest period between sequential CO alarm tests time that a five pound Class ABC fire extinguisher must operate continuously gt 095 11 inches water column is the vapor pressure a propane bottle at00 F maximum pressure indicated by a dial type manometer correct pressure coming from the second stage of a propane regulator propane regulator lock up pressure 096 What must be disconnected when performing a Time Pressure Drop Test using a Propane System Test Kit A Range burner B Low pressure line C Appliance regulator D Automatic changeover 097 While performing a regulator lock up test the propane pressure exceeds 14 inches water column You must A adjust the lock up pressure by turning the screw counter clockwise B adjust the lock up pressure by turning the screw clockwise C replace the regulator D open the bypass valve on the propane test apparatus 098 A propane lock up test requires vapor flow A 0 B 25 C 50 D 75 099 On a correctly adjusted propane system a Operating Pressure Test will show inches water column A 8 B 10 RVIA 11 20 2011 29 of 70 11 14 100 What percentage of the normal BTU demand is required to perform
20. is undersized for the application C has reached pressure inversion is thermal imbalance 023 Propane gas released into the atmosphere is A unacceptable B greenish in color C condensed into a liquid D Invisible 024 Pressure inside of a propane container varies with A temperature B size of container liquid level in container D pressure relief valve setting 025 The Department of Transportation DOT certifies propane tanks regulates propane cylinders controls interstate transport of containers oversees propane retailers gt 026 The American Society of Mechanical Engineers ASME A oversees the recertification of cylinders RVIA 11 20 2011 19 of 70 controls manufacturing of containers C regulates propane tanks D certifies propane cylinders 027 Before filling a propane cylinder you must check the A capacity in gallons B date of manufacture C tare weight D paint condition 028 The data plate on an ASME tank does not specify gallons of water capacity tare weight maximum allowable working pressure overall diameter gt 029 Propane containers must be mounted to the RV so they will not become dislodged when force equal to times the filled container weight is applied in any direction A 2 B 4 6 8 030 Another name for a J tube vapor withdraw tube B dip tube C suction tube D filler tube 0
21. it is better to be able to use them at moment s notice without having to look up or rely on reference materials Once you have command of the formulas you will be surprised how often they are helpful to you The First Problem What do all of those letters mean Ohm s law formulas use letters to represent different variables the equations Don t panic if you have never learned or forgotten how to solve algebraic equations The equations that a Service Technician will need to solve are very simple and require only addition subtraction multiplication and division and usually only one unknown You are allowed to use a non programmable calculator during the test so there is no worry about math skills In fact it is recommended that a simple calculator be a standard tool that is kept in every tech s tool box The cheapest most basic calculator will do the job Before you learn how to manipulate the equations what do all of those letters mean When you read about Ohm s Law you will find what seems to be an endless and confusing array of letters and formulas Different textbooks use different letters to represent exactly the same thing Don t let that become a problem for you What you need to understand is that there are only FOUR components that you need to know Only four Ohm s law defines the relationships between P power voltage I current and R resistance Here we are using the letters P and R to re
22. propane containers and fittings a Visually inspect container surface measure dents inspect for damage e g secondary heat damage drop damage broken welds etc inspect for surface rust b Review the container data plate date of manufacture cylinder recertification water capacity dip tube length cylinder tare weight cylinder manufacturer DOT and or ASME specifications container construction specifications surface area serial number and registration number Canadian Inspect install mountings and brackets Inspect replace container relief valve Inspect replace excess flow valve s Inspect replace container service valves Inspect replace 80 outage valve 11 20 2011 6 of 70 Inspect replace fill valve insure dip tube correct length Inspect replace sight gauge and its float mechanism Inspect replace OPD Inspect adjust replace regulator size requlators locate vent position adjust regulator replace regulator ensure required protection Inspect high pressure system POL and CGA791 differentiate between green black and blue mating connector knobs backflow check valves on automatic changeover quick disconnect high pressure side excess flow valve high pressure hose piping tubing and routing and support solenoid shut off valves pressure reduced to 30psi withi
23. rest will show an approximate voltage of ___ DC volts A 14 5 B 14 1 C 12 8 D 12 0 118 Paralleling batteries increases voltage B resistance C capacity D inductance 119 A technician makes the following observation the circuit blows the fuse What is the problem Circuit has an open Circuit has a short Relay is open Switch is open gt 120 the gauge of copper wire increases its diameter decreases in size changes composition increases in size varies in length gt 121 complete circuit must have RVIA 11 20 2011 33 of 70 current and source B source and conductor C source load and conductor D load and source 122 To determine correct wire size you must calculate the load switch B hardness C amperage D voltage 123 If you remove copper material or strands when stripping a wire you should continue your work cut it off and start over again use a crimp connector use a butt connector gt 124 When replacing fuses any appliance you should always use one with ahigher amp and volt rating alower amp rating C the same amp and volt rating D the same amp and higher volt rating 125 Before removing and installing a replacement power converter you would A turn the branch AC circuit breaker on B always disconnect battery and AC power supply C always disconnect battery isolator D always sh
24. watts so P represents exactly the same thing as W in an Ohm s Law equation V or It is easy enough to remember V means voltage but how does that equal You have to think about what you learned from reading the basic electrical books When a charge builds up with positive polarity in one place and negative polarity in another a powerful electromotive force EMF exits This force is known as voltage and you might hear it referred to as electrical pressure Think of the word electro motive and motive or the force pressure that moves electrons being the key Electro motive force equals voltage E V R or This one is easy R resistance Resistance is expressed in ohms the symbol for ohms is a horseshoe shaped object Normally is never used to express a variable in an Ohm s Law equation The letter or symbol representing resistance will be R or A or Amperage or Inductive Force is another one that is difficult to connect Current flow is measured in Amperage It is easy to remember A amps but more difficult to equate to the same thing Think of inducing to bring about the flow of current Inducing flow is similar to Inductive Force both start with the letter Amperage and Inductive force both represent current flow A I Cutting to the chase most often Ohm s Law will use the letters 1 and But not always so you must know the equivalents Manipulating the Formulas This has not
25. 083 156 229 D 011 0 084 157 230 012 085 158 231 013 086 159 232 014 087 160 233 015 D 088 B 161 B 234 C 016 A 089 A 162 A 235 D 017 D 090 A 163 D 236 A 018 A 091 B 164 B 237 B 019 C 092 D 165 C 238 D 020 C 093 A 166 C 239 A 021 D 094 B 167 D 240 A 022 A 095 C 168 B 241 B 023 D 096 B 169 A 242 A 024 A 097 C 170 A 243 D 025 B 098 A 171 0 244 026 099 172 245 027 100 173 246 028 101 174 247 0 029 D 102 D 175 248 030 103 176 249 031 0 104 177 250 032 D 105 178 0 251 033 106 D 179 252 034 107 180 D 253 D 035 108 D 181 254 036 109 182 0 255 D 037 110 8 183 256 038 111 184 257 039 112 0 185 258 D 040 D 113 186 259 041 114 187 260 042 115 188 261 043 116 D 189 262 044 D 117 190 263 D 045 118 191 264 046 119 192 265 047 120 193 266 048 121 194 267 049 D 122 195 D 268 D 050 D 123 B 196 B 269 RVIA 11 20 2011 59 of 70 051 052 053 054 055 056 057 058 059 060 061 062 063 064 065 066 067 068 069 070 071 072 073 gt gt
26. 31 What information is not found on the protective collar of a DOT cylinder A Initials of the inspector B Name of manufacturer C Dip tube length in inches D Propane capacity in pounds 032 What component is not connected directly to the service valve on a DOT cylinder A Dip tube B Outage port C Relief valve D Excess flow check valve 033 Component that prevents the accumulation of excess moisture on the regulator diaphragm is called the A outage port B relief mechanism C vent D bonnet 034 What gauge number indicates the largest diameter copper wire RVIA 11 20 2011 20 of 70 0 00 14 12 gt 035 How many amps will a 12 volt circuit draw with 5 ohms resistance A 6 2 4 24 60 036 What is the resistance in a 12VDC 6A circuit 0 5 ohms 2 ohms 7 2 ohms 72 ohms gt 037 Hw many amps will a 120V 100w light bulb will draw 038 What is the resistance of a 120 volt 1200 watt electric heater A 1 2 amps 12 ohms 10 amps D 100 ohms 039 What type of circuit is pictured below 500 Amp 12 VDC Battery gt 500 12 VDC Battery Short Series Parallel Series parallel A B C D 040 A short circuit is a complete circuit that has A aconductor that is less than 6 in total length B less than five amps agrounded wire RVIA 11 20 2011 21 of 70 D re
27. Recreation Vehicle Industry Association SG Study Guide for _ Registered Technician Study Guide for the Registered RV Service Technician Test Compiled by the Recreation Vehicle Industry Association Table of Contents 1 What is RV Service 1 RVST Career badder 1 Which Path is 2 What You Must Know to Pass the Registered Technician 3 4 5 RV Registered Technician Core Standards 5 Using and Remembering Ohm s Law Formulas 11 The First Problem What do all of those letters 11 Manipulating the 12 Ohm s Law 13 Never Miss an Ohm s Law 14 One More Example Using Both Formulas 14 Sign off Sheet Required 15 Key Facts to Remember 2 16 Sample Questions denare neigi naine oot nate not tno natn na tng et 16 ANSWER Key _
28. aking smaller tests that focus on a specific subject category Either way diligent study is required and the best chance for success is to participate in the Florida Distance Learning Program or the RVIA On Line Test Prep Course both of which are offered through the RV Learning Center www rvlearningcenter com Be sure to review the study guides as well and incorporate the practice test questions into your study plan What You Must Know to Pass the Registered Technician Test The curriculum for the RV Service Technician begins with the DACUM Chart Job and Task Analysis This document outlines all the Duties Tasks and Steps a service technician is expected to know The DACUM is also known as the RV Service Technician Standard and is further broken down to align with the levels of the RVST Career Path RVIA 11 20 2011 3 of 70 This study guide is focused on the Registered Technician level of the Career Path The Registered Technician is the second level following the Candidate and preceding the Specialty or Certified levels The Core Standards Chart lists all of the Duties Tasks and Steps associated with the Registered Technician level Each section begins with the Duties which will list the main topics covered The Duties are followed by the activities a technician should be able to perform in each area This list was developed by working technicians educators and subject matter experts from across the country and will provide a valuable
29. ance procedures is yet another must have skill the qualified service tech will master The reward is that once the above is accomplished a valued RV service technician will seldom if ever be without a job To this day there remains a remarkable shortage of qualified RV service technicians in the industry to staff not only traditional RV dealerships but also those of stand alone service shops and repair centers that are constantly seeking qualified individuals There are many service technicians that open their own mobile RV repair business The bottom line is that all good RV service technicians will always have work even during the toughest of economic times It s been proven serious RVers will never entirely give up their lifestyle They may take shorter less frequent excursions but even when fuel costs approach record highs they will still be using that RV And that s the very reason it is an attractive option to become a professional RV service technician RVST Career Ladder The Service Technician Career Ladder was developed and launched through the combined efforts of the RV Dealer Association RVDA the RV Industry Association RVIA and the Certification Governing Board RVIA 11 20 2011 1 of 70 RV Service Technician Before the Career Ladder was established there was only one way to become a Certified RV Technician and that was to take and pass a comprehensive Master Score on Test All Five Specialties certif
30. ank be used on quick disconnect containers 006 Gloves must be worn when A filling a propane cylinder B performing a regulator lockup test C closing a service valve D replacing an empty cylinder 007 An opened outage valve is used to indicate excess pressure for container purging to determine when container is empty to indicate the maximum liquid level 008 Backup wrenches used A to help break free rusted fasteners B to prevent damage to propane connections C keep bolts from turning during installation D when primary tools are in use 009 When filling a propane container 25 feet is the minimum distance to the nearest building maximum distance to a fire extinguisher minimum distance to an ignition source required length of the fill hose 11 20 2011 17 70 010 When transporting a DOT propane cylinder you should install a dust cap B never place in car trunk C lay cylinder on side and block from rolling D open service valve to assure tank is empty 011 44 Fahrenheit is the temperature propane liquid freezes absolute zero maximum vapor temperature the boiling point of propane 012 What is the weight of five liquid gallons of propane A 21 pounds 42 pounds 442 ounces D 24 pounds 013 A pound of liquid propane at 60 F weighs 14 ounces contains 21 548 British Thermal Units expands
31. arallel with the power on 167 The opposition to the flow of electricity is called inductance B amperage C reluctance D resistance 168 Ohms Law states that as the resistance in a circuit increases with a fixed voltage source the current increases decreases stays the same stops in all cases gt 169 Resistance is measured in A ohms B volts C amps D farads 170 When using Ohm s law which of the following numbers would have to be converted 30mA 30 Amps 30 Ohms 35 000 Ohms 171 A device in a circuit which utilizes power from the source is called a conductor B battery C generator D load 172 A control device which opens and closes in a circuit is called a battery switch resistor D load 173 As resistance increases in a given circuit the amperage increases B decreases C reverses D remains constant 174 The power which is consumed by an AC electric toaster is called A wattage RVIA 11 20 2011 41 of 70 ohms I0 inductance 175 The function of an auto transfer switch connects all power sources together only used with battery chargers allows only one power source to the vehicle s circuit at a time move vehicle electrical control from front dash area to entertainment center 176 Proper connection of the white wire the bare copper wire
32. ator for sounds of escaping propane that would indicate an open line Silence indicates the regulator has locked up Remove a range burner and attach a manometer to the range burner spud Turn on the burner valve with the manometer and ensure the propane system is pressurized to 10 14 W C Turn off propane system at the service valve Slowly open a second range burner and reduce the operating pressure to a nominal 8 W C Turn range burner off after achieving a nominal 8 W C Monitor the manometer for a minimum of 3 minutes Locate and repair any leak s and retest until a successful test is accomplished Go to Leak Test Sign off Sheet Turn off the range burner with the manometer disconnect the manometer from the range burner spud and reconnect the range burner Return propane system to proper operation Document test results on appropriate documentation Indicate pressure time duration of test date and sign OR Time Pressure Drop Test Using a Propane System Test Apparatus The following procedure is used to connect the Propane System Test Apparatus as described in the RVIA Propane System Textbook It is provided as guidance but is not part of the Time Pressure Drop Test With all appliances turned off and the propane supply turned off disconnect the low pressure hose or piping from the regulator Connect the flex hose to the regulator Attach the low pressure hose previously attached
33. cated A outside inthe bathroom C inthe kitchen D bedroom 134 The neutral wire connected to the 120V AC shoreline power should be ungrounded in all 120V AC RV wiring only in RV s employing 3 or more branch circuits only when 30 amp service is used only in Class A motor homes Dopp 135 Current supplied by commercial power lines and RV generators is known as A Alternating Current B Direct Current C Inducted Current D Accelerating Current 136 A material that has a very high resistance and is used for supporting or separating conductors is called A an insulator a semi conductor resistor an inductor 137 A conductor is used to transfer electricity from one point to another RVIA 11 20 2011 35 of 70 resists electrical current C allow current to leak to ground D induces electricity to other wires 138 Black Hot White Neutral and Ground provide volts A 12 B 120 C 240 D 480 139 An inverter is used to change 120 AC to 12V DC 12V DC to 24V DC C 12V DC to 120V AC D 120V AC to 24V DC 140 The minimum amp breaker that could be used in line to adequately protect a 120V water heater with 1400 watt element is amp A 10 15 20 D 30 141 When stripping a wire you should strip only an area to fit in the connector 1 8 larger than the connector 1 4 larger than the connector 3 8 larger than the connecto
34. ch Meter reading will show Zero Ohms sometimes a meter will read 1 to 3 ohms due to resistance in the meter leads Open Circuit i e Wire cut in half or a switch that won t make continuity Meter reading will show infinity 1 most digital meters will read OL or OFL Grounded Circuit i e Bare wire touching ground Meter will read the same way as a short zero when the circuit is tested from a conductor to ground gt Read the indicated value Accurately diagnose and repair problems if any exist Compare the reading to component specifications RVIA 11 20 2011 68 of 70 Appendix 1 Signoff Sheets Measuring DC Voltage Amperage Resistance and Continuity Sign Off Sheet Printed Technician Name Social Security Number Address Telephone Number City State Zip Code STEP Initials Date Measuring DC Voltage Did the candidate Set VOM to DC voltage scale Ensure meter capacity is greater than expected voltage Measure DC voltage at various locations i e brake lights tail lights Connect black lead to circuit ground Connect red lead to the live side of the circuit Read the indicated value Measuring Amperage Current If using an in line series ammeter VOM Did the candidate Set VOM to DC amps scale Ensure meter capacity is greater than expected amperage Turn off power to the circuit Disconnect the circuit at the poin
35. codes A 38 B 42 C 54 D 58 273 It is recommended that when torching off a container the torch be located at least feet from the unit for fire safety A 5 B 10 15 D 20 274 A torch up to BTU is typically used to burn off the remaining LP gas vapor from a container A 200 000 B 300 000 C 400 000 D 500 000 275 One gallon of propane contains approximately 91 690 BTU s at 60 degrees F An appliance rated at 30 000 BTU will have a continuous operation time of approximately 2 hours hours hours 12 hours 11 20 2011 55 of 70 276 You have two 20 pound cylinders A pound of propane contains approximately 21 600 BTU Approximately how long will a 30 000 BTU appliance operate continuously at 60 degrees F A 19 hours B 29 hours C 39 hours D 49 hours 277 Exceeding the vaporization rate of the container is caused by A cold ambient temperature B high demand on system C low liquid level D Allof the above 278 Which of the following are types of maintenance records kept by a dealer or repair facility pre Delivery inspection forms B warranty registration forms C maintenance repair work order forms D Allof the above 279 When performing welding repairs on a vehicle that is equipped with a 12 VDC battery you should disconnect the generator disconnect the battery unplug the shore cord Do all of the above gt
36. components multiplying the resistance of all components using a complex formula 051 In a battery bank where the positive terminals are connected to the negative terminals the batteries are in series series parallel C parallel parallel series 052 When multiple batteries are connected in parallel the available current equals the A lowest amp hour rating sum of all amp hour ratings C average of all amp hour ratings D highest amp hour rating 053 What is the voltage of two 6 volt batteries connected in series A 0 B 6 9 D 12 RVIA 11 20 2011 23 of 70 054 The symbol below when found on wiring diagram represents TOTO aresistor adiode C arelay D an alternator 055 The symbol below when found on a wiring diagram represents e A connected wires B SPST switch C adiode a transistor 056 To measure current drawn by a motor using a clamp on ammeter place the sensor clamp around the ground wire B black wire C white and black wire D black white and green wires 057 An open switch will electricity increase B conduct C not conduct D decrease 058 This symbol identifies a on a wiring diagram e o open switch closed switch momentary contact wire connection gt 059 A continuity test is performed with an A ammeter B Ohmmeter C wire lead D circuit tester 060 H
37. connector devices meter testing d Define common terms open short voltage drop resistance grounded polarity continuity amperage voltage e Comply with safety procedures common shock hazards battery safety and explosion hazards voltage source I Identify overcurrent protection devices fuses glass blade fusible link and T fuse slow blow breakers type 1 2 manual reset and 3 g Interpret electrical drawings pictoral drawings wiring diagram schematic diagram h Identify common symbols on wiring diagrams C AC ELECTRICAL SYSTEM 11 Demonstrate knowledge of basic AC theory and safety a Apply Ohm s law Apply Watt s law derivative of Ohm s Law Differentiate between AC and DC circuits perform visual inspection types of circuits series and parallel type of wire used stranded vs solid connector devices meter testing d Define common terms open short resistance grounded continuity polarity amperage voltage isolated neutral e Comply with safety procedures common shock hazards RVIA 11 20 2011 8 of 70 battery safety and explosion hazards voltage source f Identify overcurrent protection devices fuses breakers including HACR g Identify GFCI ground fault circu
38. d to the fill valve is called the excess flow valve service valve overfilling prevention device pressure relief valve 232 The valve designed to open at a specific pressure to prevent container rupture is called the A pressure relief valve B excess flow valve C auto stop D back flow valve 233 is the minimum time in minutes for conducting a timed pressure drop test per NFPA 1192 A 1 3 5 D 10 234 What is the nominal inches of water column pressure that must be maintained during a timed pressure drop test A 3 7 8 D 10 235 A manometer is an instrument used to measure A gas density B electrolytes volume C gas volume D gas pressure 236 A lock up test is conducted to determine the upper operating range of the regulator the lower operating range of the regulator the upper pressure of the container s output the lower pressure of the container s output gt 237 The maximum allowable lock up pressure of any water column propane system is 16 inches w c B 14 inches w c 12 inches w c D 11 inches w c 238 Which one of the following conditions must exist during a lock up test A All appliances operating B Only pilot lights lit C 50 BTU capacity RVIA 11 20 2011 49 of 70 LP demand 239 Upon completion of a regulator adjustment you should always follow up with a test lock up test time pressure dr
39. didate Prepare Documentation Perform the test using a ground monitor or circuit tester Accurately diagnose and repair problems if any exist Document Results GFCI Test Did the candidate Prepare Documentation Push the test button on the GFI outlet or breaker Test any 120VAC receptacles within 5 feet of water and all outside receptacles Use a GFCI Polarity Tester to check outlets that are GFCI protected but have no test button Accurately diagnose and repair problems if any exist Document Results RVIA 11 20 2011 65 of 70 Sign off sheet revised June 23 2008 Appendix 1 Signoff Sheets RVIA 11 20 2011 66 of 70 Sign off sheet revised June 23 2008 Appendix 1 Signoff Sheets Measuring AC Voltage Amperage Resistance and Continuity Sign Off Sheet Printed Technician Name Address City State STEP ID Number Telephone Number Zip Code Initials Measuring AC Voltage Did the candidate Set VOM to highest AC voltage scale Date Ensure meter capacity is greater than expected voltage Measure AC voltage at various locations i e AC Receptacles Connect black lead to circuit neutral Connect red lead to the live side of the circuit Switch VOM down to best range Read the indicated value Measuring Amperage Current When using an in line series ammeter or VOM
40. drawing a technician must be familiar with pictorial drawings B ladder diagrams C schematics D process flow diagram 202 When splicing a 120 VAC wire you must A use listed electrical tape use junction box both D you don t splice 120 VAC wire 203 A hydrometer is used for test volts ohms B measuring specific gravity in electrolytes C test printed circuit boards D test diode type battery electrolytes 204 The function of a multimeter is to test volts amp ohms apply variable loads to battery test diode type battery isolators measure specific gravity in electrolytes 205 If a GFCI receptacle is properly wired what condition exits A Polarity tests are not necessary B Involved circuit must have circuit breaker protection All receptacles downstream will be GFCI protected D Vehicle grounding for interior lights is not required 206 What does the electrical term watts mean A Load current B Voltage drop C Battery ampacity D Measurement of electrical power RVIA 11 20 2011 45 of 70 207 What procedure must be used when passing all conductors through bulkheads and or partitions A Employ clamp amp grommets to prevent chaffing B Wire tie all parallel wires C Add heat retardant material D Separate dissimilar wires colors 208 What should be performed when a bonding strap or bonding screw is present
41. e letters in place as you repeat this to yourself Ohm s Law is as easy as PIE It is so easy Even can Remember it Say it again several times Ohm s Law is as easy as PIE Even Remember Ohm s Law is as easy as PIE Even can Remember Write down the letters P 1 and E I R in position relative to the lines you have drawn One More Example Using Both Formulas A refrigerator is not functioning properly in electrical mode no cooling A faulty 120 VAC heating element is suspected Measuring the resistance of the heating element using a multimeter shows that it has 20 ohms of resistance To determine if this is the correct resistance without having access to a service manual locate the data plate on the refrigerator The data plate indicates that the refrigerator heating element draws 325 watts on 120 VAC Now the resistance of a properly working heating element must be determined to make a comparison To do that the resistance will have to be calculated knowing that it consumes 325 watts of power Ohm s law can be used to find the resistance in a circuit if the other two factors Electromotive Force Voltage and Inductive Flow Amperage are known In this example the voltage and the wattage are known But the resistance formula requires that the inductive flow current be expressed in amperes RVIA 11 20 2011 14 of 70 The first step will be to convert watts to amps using power fo
42. e reasoning You must know the correct facts For instance a propane regulator locks up at what pressure A list of required RV Technician facts begins on page 16 Learn them there is no other way Resource list The following resources are available to help you prepare for the Registered Technician Test The Textbooks and publications are available through the RVIA Store at www rvia org Many technicians have found the basic electrical portion of the test to be difficult Electricity DeMystified by Stan Gibilisco is easy to read and presented a non technical format A number of the questions on the test cover electrical theory and this book will help anyone better understand the basic concepts The Electrical Systems textbook focuses more on the RV Electrical Systems and does not go into great detail regarding basic electrical theory For that reason we recommend that you study the concepts presented in the Gibilisco book to prepare for the test This book is not available through the RVIA Store but can be purchased at retail outlets RVIA 11 20 2011 4 of 70 including Amazon com and others There are many other good books and on line resources cover basic electricity which are not listed here Introduction to RV Service RVIA Textbook Pre Delivery Inspection RVIA Textbook Electrical Systems RVIA Textbook Propane Systems Textbook Preventive Maintenance RVIA Textbook Electricity DeMy
43. e third in this example amps or I Notice that solving for leaves RVIA 11 20 2011 13 of 70 over The equation would be E R or 1 1 and one divided by one equals The definition above states one amp so yes indeed the formula did work The example is simple because all values are one But it works the same no matter what values are used II the problem specifics 6 ohms and 12 volts we can put in those values to get 12 6 2 amps The two values we know be 5 amps at 120 volts which gives us the equation R 120 5 or the Resistance 24 ohms The other Ohm s Law equation that Service Technicians work with is often called the Power Formula or Watt s Law This formula can be manipulated in exactly the same way Let say you have 1500 120 volt AC water heater element and want to know how many amps it will draw P E Plugging in the numbers 1500 120 or 12 5 amps Never Miss an Ohm s Law Problem You have learned how to recognize the letters and manipulate the formulas but how do you remember them You may have realized that the triangles only work when the letters are put into the correct order The very first thing you should do when sitting for the Registered Technician Test or encountering any Ohm s Law problem is to draw the horizontal and vertical lines you can imagine the triangle or circle no need to draw it on a piece of scratch paper Put th
44. ehensive certification path Am interested in obtaining Master Certification These questions and more will need to be pondered in choosing the correct path in fulfilling your career goals RVIA 11 20 2011 2 of 70 If your quest is to become Master Certified which can be obtained by using either path the decision will be one based your personal abilities as well as the time and resources you can devote to the process On the comprehensive path the score on the test will need to be high enough to be granted Master status On the specialty path the technician must earn all five specialties to become Master To acquire Master status by either path the technician must have at least 5 years of experience as a technician If the technician has less than the required 5 years he will hold a Certified status until the time in service requirement has been completed Following the comprehensive path the technician will need to study the entire body of knowledge and take a 3 hour 200 question test Those receiving a score above 76 5 will become Certified Those receiving a score of 90 or above will become Master Certified pending time in service Certification status is granted for 5 years To maintain Certified Technician status 40 hours of continuing education credit is required with 80 of the credit hours being earned in the last 3 years of the certification period There is a 100 fee for this recertification The fee for the generalist test is
45. essure systems D distance 266 Any propane cylinder due for re certification can be recertified by a master technician can not be filled or used can be used only on pre 1985 RVs must have the service valve replaced Jow 267 When removing and replacing an ASME tank mounting bolts should be replaced with bolts larger size and stronger equal size and strength equal size and stronger equal size and longer 268 A technician can determine the grade of a by A the shape of the bolt head B the color of the bolt C the type of nut used RVIA 11 20 2011 54 of 70 marking its head 269 A high pressure flexible connector pigtail is limited to a maximum length of feet A 3 B 5 10 D 15 270 If a high or low pressure propane hose needs a new fitting you should replace the entire hose assembly use duct tape swag a new fitting on the hose replace with barbed fitting with a hose clamp 271 solenoid valve propane system is a normally closed valve What does this mean The valve is closed manually to allow the gas to flow Power to the valve is needed to keep the valve open Power to the valve is needed to keep the valve closed The valve is closed manually to stop the flow of gas gt 272 Blowing unburned propane vapor into the atmosphere though an orifice larger than a drill is against fire safety and or environmental
46. hing to do with Ohm s Law it is purely mathematics Service Technicians will only have to deal with two different Ohm s Law equations But these two equations can be manipulated into six different formulas Combine that with the different letters representing the variables and it is easy to see why the subject is confusing It is not within our scope to teach technicians fractions and basic algebra However we can show you how to manipulate the one type of equation that you will encounter Let s use the letters a b so we don t confuse this part with Ohm s Law The type of simple equation that you will encounter is a bc If you manipulate the equation to solve the problem for b or c you will have RVIA 11 20 2011 12 of 70 b a c and c a b This is one equation that when solved for a b and appear to be three different equations when it is really the same equation that has been manipulated First we have to understand the nomenclature a bc means a equals b times c or a equals b multiplied by c b a c means b equals a over c or b equals a divided by c As you can see we are simply multiplying or dividing depending on where the letters are positioned The idea here is that the position of the letters determine whether the numbers are multiplied or divided Without learning any math there is a very simple method for this type of equation It is often referred to as the magic triangle You begin by imagining a t
47. ication test With the launch of the Career Ladder there are now two paths to certification There is the traditional path through the existing RV Service Technician Certification Test and an alternate path through achieving Specialty Certifications Optional Paths The certification process begins with the Candidate level which provides a basic orientation to the RV Service Technician career Next comes the Registered Technician level where the core knowledge of propane basic electrical and other kills are mastered The technician Certified Certification can then move on to one of two Test Specialties paths He can choose to take the comprehensive test which covers all subjects required for certification or master certification or he can choose to move through the individual specialties Candidate e Appliances i Body Career Ladder e Electrical Systems e Plumbing Once a technician holds all five Specialties or passes the full certification test at the master level and meets the time in service requirement he becomes a Master Certified RV Technician Which Path is Right for You When you become involved in lifelong training and decide to seek accreditation as a Certified RV Service Technician some decisions still need to be made Do want to follow the right side of the career ladder and get specialty certifications or should to the left side and take the compr
48. it interrupter receptacles circuit breakers h Interpret eletrical drawings pictoral drawings wiring diagram schematic diagram i Identify common symbols on wiring diagrams J INTERIOR COMPONENTS 65 Inspect install maintain safety equipment Install maintain replace smoke detectors CO alarm propane detector Install inspect fire extinguishers Check operation of emergency exits Interior glass and mirrors must comply with ANSI 297 1 Exterior glass must comply with ANSI 226 L TECHNICAL SKILLS 70 Install accessories interior and exterior b Identify impact of adding accessories on chassis weight and distribution e Comply with regulations regarding adding accessories maximum widths heights lengths weights Federal weight label compliance 71 Perform preventative maintenance Check propane systems Service and adjust appliances Test Winterize coach and de winterize Check safety items Check and lubricate doors Check exterior lights Check window roof molding seals Change oil and filter on power plants Check wiper blades Visually inspect fluid levels Service batteries Inspect belts and hoses Change chassis oil and filter and lube chassis Change transmission oil filter and gasket Visually inspect chassis Check lug nuts and tire pressure Flush and refill cooling system Test drive Drain and flush water and waste systems
49. l records time sheets etc Record and sign for work performed and declined on appropriate form timed pressure drop test results document date start and stop time pressure maintained etc Record all parts and inventory used f Record time in and time out for service 5 3 gt 11 20 2011 10 70 Record serial number production number hours of operation and model of all appliances addressed Record mileage motorized units and serial number of coach 75 Identify types of RVs a Motor homes class and and Super C s b Towables travel trailers hybrids 5th wheels folding camping trailer Truck camper d Toy hauler Using and Remembering Ohm s Law Formulas Although many technicians find the Ohm s Law test questions difficult in reality they are some of the easiest to answer correctly By understanding a couple of key concepts and employing simple memory aids you will always be able to calculate the correct answers on the test and for years to come Technicians have told us it is not necessary to memorize the formulas because they are not often used and when they are needed they can just look them up on a chart While that is true
50. liquid from getting into propane a piping liquid expansion regulator damage and propane vapor release Use proper tools Maintain safe distance from ignition sources to avoid explosion and fire e Wear proper protective clothing goggles specialized gloves hard soled shoes I Properly store propane cylinders to avoid vapor build up open ventilated space proper orientation with valves closed and safety dust caps installed RVIA 11 20 2011 5 of 70 9 Transport cylinders properly 2 Demonstrate general knowledge of propane a Demonstrate knowledge of propane theory efficiency of propane based on ambient temperature and rate of vaporization area of wetted surface expansion rate of propane limits of combustibility to ensure proper air mixture container refrigeration b Identify properties of propane boiling point specific gravity of vapor weight per gallon btu s per gallon chemical make up odor Understand Boyle s Law and Pascal s Laws general definition d Define common terms and identify components cylinder tank container butane propane inches of water column w c 519 water capacity w c other terms in glossary e Demonstrate knowledge of RV codes related to propane NFPA 1192 CSA 2240 3 Inspect maintain replace
51. lts on appropriate documentation indicating observed pressure time duration of the test date and sign RVIA 11 20 2011 62 of 70 Sign off sheet revised June 23 2008 Appendix 1 Signoff Sheets System Operating Pressure Test Leak Test Regulator Adjustment amp Lock Up Tests Sign Off Sheet Printed Technician Name ID Number Address Telephone Number City State Zip Code STEP Initials Date System Operating Pressure Test The following procedures apply using test apparatus as described shown in the RVIA Propane Systems Textbook Did the candidate Prepare document work order PDI form etc to record test results Ensure the propane system is turned off at the container service valve Turn off all appliances Disconnect the propane low pressure hose from the regulator use backup wrench Connect test apparatus to the regulator Connect the Propane low pressure hose to the test apparatus Install manometer to the apparatus Open service valve on the container Open gas cock on test apparatus simulates 50 flow Measure inches of water column WC on manometer 10 5 11 5 WC Adjust regulator if measured WC is incorrect Document test results Propane Regulator Adjustment If Propane pressure is greater than 11 5 WC Did the candidate Prepare documentation Remove dust cap Adjust by turning the adjustment screw counte
52. mponent designed to protect RV users from electrical shock in a wet location is called a A ground fault circuit interrupter B double insulated circuit breaker C non contact switch D fused power strip 071 How is voltage determined Ohms divided by watts Amps times ohms Watts times amps Watts divided by amps gt 072 The mathematical equation is named after German physicist Georg Ohm English chemist and physicist Michael Faraday German physicist Gustav Robert Kirchhoff Scottish engineer James Watt gt 073 The narrow blade of a three prong 120 plug is connected to live hot conductor B neutral wire C ground connection D insulating wire 074 How do you determine how often a fire extinguisher needs to be checked A Look at the inspection tag located on the extinguisher B Consult RVIA textbook C Review local codes D Read the manufacturer s instructions 075 Testing procedures for propane alarms can be found inside the alarm housing B inthe RV owner s manual manufactures instructions RVIA 11 20 2011 26 of 70 inthe textbook 076 The working of a propane alarm is A 1 year 5 years 10 years specified by the manufacturer 077 ACO alarm is tested monthly annually after every activation per manufactures instructions 078 After sealing unit s exterior
53. n 60 of container outlet differentiate between schedule 40 and schedule 80 pipe including proper use Purge containers per NPG standards Fill containers per NPG standards Transfer propane from one container to another container Burn off propane in a container Comply with safety procedures 5 Perform propane system tests a Perform container and fitting leak tests use appropriate leak detector solution operate electronic gas leak detector b Perform system tests timed pressure drop test leak test ACME pigtail connection backflow device cylinders only lock up test system operating demand pressure test regulator adjustment test d Perform propane detector system test Calibrate manometer gauge and U tube f Complete proper documentation of test results 1 gt 5 6 Troubleshoot propane system faults I Diagnose and Repair container filling problems g Diagnose and Repair container refrigeration situation B DC ELECTRICAL SYSTEMS 7 Demonstrate knowledge of basic DC electricity and safety a Apply Ohm s law Apply Watt s law derivative of Ohm s Law Differentiate between AC and DC current perform visual inspection types of circuits series and parallel 11 20 2011 7 of 70 type of wire used stranded vs solid
54. ng Time Pressure Drop Test 8 times their weight the amount of force required to hold propane containers 10 psi 1st stage regulator pressure 11 W C propane system operating pressure 14 W C maximum propane system pressure regulator lock up pressure 25 feet distance from ignition source when handling propane 44 F boiling temperature of propane 50 propane demand during System Operating Pressure Test 80 fill capacity of propane containers 21 548 BTUs in a pound of propane ASME American Society of Mechanical Engineers DOT Department of Transportation GCWR Gross Combined Weight Rating GVWR Gross Vehicle Weight Rating Sample Questions 001 What percentage of propane tank capacity is reserved to prevent overpressure from expansion A 10 B 20 C 50 D 80 RVIA 11 20 2011 16 of 70 002 What test must be performed each time a system is opened E System Leak F Propane Delivery G Time Pressure Drop H Regulator Lockup 003 When purging a 20 propane cylinder what is the minimum distance to an ignition source A 5 feet B 15 feet C 25 feet D 35 feet 004 A service shut off valve should be only be closed with A adjustable wrench asocket wrench C hands D ashort lever 005 A Type I CGA 791 valve should A never be fitted with a dust cap B never be closed with a POL plastic plug be used when filling an ASME t
55. off sheets can be downloaded from the RV Learning Center s web site www rvlearningcenter com Print the sign off sheets and perform the tests Practice the tests until you are sure that you have thoroughly learned each one 1 Propane Time Pressure Drop 2 Propane System Tests a Operating Pressure b Regulator Adjustment c Regulator Lockup d Leak 3 AC Electrical Systems Tests a Hot Skin b Polarity 4 AC Electrical Tests a Voltage b Amperage 5 DC Electrical Tests a Voltage b Amperage c Continuity RVIA 11 20 2011 15 of 70 Key Facts to Remember There will be some questions on the test that require memorization of certain facts or figures Listed below are some of the facts that a Registered Technician will need to know for the test The textbooks and instructional materials outlined in this study guide will explain each of these items in context If you don t know what an entry means or how it is used look it up in the reference materials and be sure you understand each one before attempting the test 1290 amount propane expands for every 10 degrees it is warmed 1 5 times weight of propane as compared to air 2 15 to 9 6 ratio of propane air mix for combustion limits of combustibility 3 minutes time for pressure drop and regulator lockup tests 4 2 lbs weight of one gallon of propane 5mA amount of current to trip a 8 W C system pressure duri
56. op test operating pressure test atmospheric test gt 240 The two ingredients that are prohibited in liquid leak detectors are Ammonia and chlorine Chlorine and hydrogen Ammonia and hydrogen Alcohol and nitrogen 241 The process of displacing air and contaminants from a propane container using propane vapor or vacuum is refrigeration B purging C priming D regeneration 242 After purging a propane container at sea level there will still be pressure inside the container because of atmospheric pressure A 14 7 psi 12 psi 10 psi D 8psi 243 Contaminants in propane containers can lead to rust false container pressure odor fade All of the above gt 244 It is required that you change the fill valve mounted ASME tank safely remove propane from the tank you will A open the outage valve and drain the liquid B remove the fill valve with the cap on C burn off the propane with a suitable torch D open the service valve until the vapor is gone 245 Pinhole leaks in used containers can usually be detected by the presence of A awhite mist B an oily spot C arust spot an oxidized spot RVIA 11 20 2011 50 of 70 246 What is the propane gallon capacity of a properly filled ASME tank 60 F with water capacity of 28 6 A 15 0 B 20 5 C 22 9 D 248 A 15 B 30 40 D 45 248 The correct level that
57. ort across battery terminal to ground to discharge convertor filters 126 12 volt DC blower motors are protected split B thermally C moisture D AC 127 The battery disconnect system in a vehicle is primarily used to A change the batteries B prevent premature battery discharge C balance the voltage between batteries D beaconstant source of AC voltage 128 According to Ohm s law to find amperage you must multiply volts by resistance divide amperage by resistance multiply volts by amperage divide volts by resistance gt 129 A diode should have continuity in one direction B two directions RVIA 11 20 2011 34 of 70 three directions D four directions 130 If a customer complains of receiving shocks from his her vehicle when plugged in the first test should be a polarity check of the shore cord polarity check of the battery system voltage check converter voltage check Jow 131 When working on a 120V AC electrical circuit power should be applied only as necessary to measure current and voltage measure resistance of components change or replace components parts charge the capacitors in a circuit 132 When reading voltage with a voltmeter you should always start with the lowest voltage scale B lowest ohmmeter scale C highest voltage scale D highest ohmmeter scale 133 Wet location covers are required on all AC receptacles lo
58. ow many AC cycles are represented by the drawing below RVIA 11 20 2011 24 of 70 061 What type of breaker is used in the air conditioner circuit Slow blow Auto reset gt 062 What type of over current protection is not used in 120V circuits A Slow blow fuse C HACR D Circuit breaker 063 What is an obvious difference in 120V AC vs 12V DC RV wiring Color of insulation Size of wire Stranded wire versus solid Ampacity 064 polarity tester is used to A determine correct battery hookup B test the 12 volt DC system C determine magnet poles D test the 120 volt AC system 065 What is the proper multimeter dial setting when testing AC voltage B DCV ACV D Hz 066 To test DC voltage connect the test lead colored black to A aground B the white wire C to the battery terminal D a fused test wire 067 The volt meter indicates 12 volts and the ammeter indicates 500mA What is the resistance 024 ohms RVIA 11 20 2011 25 of 70 24 ohms C 2 4 ohms D 24 ohms 068 Current flow is measure in A ohms B volts C amperes D RMS 069 What is 5 mA A 500 amps B The amount of current required to recharge a 12 volt battery Leakage level needed to trip a GFCI D Amount of amperage that may cause death 070 A co
59. present those four components different textbooks you will find different letters It would be nice if everyone used the same letters but that is not going to change so learn to deal with the differences because it is not that difficult Power is the amount of current times the voltage level measured in wattage or watts The common symbols for Power are P or W RVIA 11 20 2011 11 of 70 Voltage is the electromotive force or EMF that is required to make current flow Voltage applied across a load or resistance is required to make electrons flow The common symbols for voltage are V or E Resistance is the opposition to the flow of electrons If the resistance of a load is increased and a constant voltage applied is maintained the current flow will decrease Similarly if the resistance is lowered the current flow will become greater The common symbols for resistance are R or Q Current is the directional flow of electrons along a conductor The common symbols for current are or A The point to all of this is that there are eight letters to represent four components and which one is equal to which this is the most difficult thing to remember Let s take them one at a time P or W Think of a light bulb How powerful is it 60 watts 100 watts Power is expressed in watts When you see the letter P in a formula it can only represent one of four components Only one starts with P and that is the word Power Power is expressed in
60. r gt 142 When making 120V AC connection to screw the wire should be circled around the screw post connection direction A counter clockwise B left hand C clockwise D opposite 143 As you lower the wattage of a 120V AC heating element its amperage draw will increase B remain the same C decrease D decrease 1 amp for every 10 watts 144 The current flowing through a 120V AC heating element at 1200 watts is 5 amps B amps C 5 0 amps D 10 0 amps 145 What symbol indicates connected wires RVIA 11 20 2011 36 of 70 gt 146 What symbol indicates a ground connection gt gt gt 147 capacitor is a device temporarily stores electrical energy is used to check electrical pressure indicates direction of a magnetic field measures electrostatic force between charged particles gt 148 Frequency is also known as columns amplitude hertz capacitance gt 149 To properly test that protection exists for any receptacle down line of a protection device you should RVIA 11 20 2011 37 of 70 turn off the main breaker unplug the refrigerator use a fault creation tester push the test button on the breaker gt 150 What is carbon monoxide an inert welding gas a gas found in propane
61. r clockwise until proper pressure is achieved Reinstall dust cap Document results If Propane pressure is less than 10 5 WC Did candidate Remove dust Adjust by turning the adjustment screw clockwise until proper pressure is achieved Reinstall dust cap Document results Propane Regulator Lockup Test Upon completion of the Operating Pressure Test and Regulator Adjustment Did the candidate Close the cock on apparatus RVIA 11 20 2011 63 of 70 Sign off sheet revised June 23 2008 Appendix 1 Signoff Sheets STEP Initials Date Monitor propane pressure on manometer for 3 minutes If pressure exceeds 14 WC replace regulator Turn off Propane at the service valve at the container Remove test apparatus Reconnect low pressure hose to regulator use backup wrench Conduct a leak test on any fittings that were disconnected Return system back to proper operation Document results Propane Leak Test This test must be preformed any time a propane line is opened or a leak is indicated during a timed pressure test Perform either of the following methods Using an electronic leak detector Did the candidate Prepare documentation Open service valve to pressurize propane system Turn off all appliances Turn on the electronic leak detector Tes
62. riangle that looks like this Then add the letters starting at the top IC Determine which letter to solve problem for then note the position of the other two letters to know whether to multiply or divide To solve for letter a look at the remaining letters b and c Note they are side by side separated by a vertical line When the letters are side by side they are multiplied together a b times c or a bc To solve for letter b notice that the remaining letters are stacked above one another separated by a horizontal line therefore b a divided by c or b a c In the same way c a divided by b orc a b You have just taken one equation and manipulated it to solve for three different variables a bc b a c and c a b Manipulating the Ohm s Law equations works in exactly the same way Ohm s Law Equations It was mentioned above that Service Techs will only have to know two different Ohm s Law equations Ohm s Law states one ohm is the resistance value through which one volt will maintain a current of one ampere Putting the commonly used letters into the magic triangle we will see Using the definition above we can put in the values and see if this works The definition states one ohm is the resistance value through which one volt will maintain a current of From this part of the definition the value of r and known and equal to one It is always the case if we know two values we can solve for th
63. rmulas from Ohm s Law The power is 325 watts and the voltage is 120 VAC Which is the power formula The one that has the letter in it for power Manipulating that formula to solve for amps gives P E The answer is 2 7 amps which was calculated by dividing 325 Watts by 120 Volts Now that the amperage is known Ohm s law is used again to determine the resistance Manipulate the formula to solve for resistance R The answer is 44 4 ohms which was calculated by dividing 120 Volts by 2 7 Amps The tolerance for heating element resistance is 10 of the specified resistance You will learn this later from the RV Refrigerator textbook Therefore the acceptable resistance range is 40 to 49 ohms 44 ohms 10 The measured resistance of the heating element is 20 ohms Since 20 ohms falls outside of the acceptable range the heating element should be replaced Ohm s law questions do not get any more difficult than this If you can follow the logic above and remember that Ohm s Law is as easy as PIE and Even can Remember you will not miss a single Ohm s Law question Ever Sign off Sheet Required Knowledge There are five sign off sheets associated with the Registered Technician career level which are made up of 13 separate tests You must know how to do each test and in what order the steps are performed The five sign off sheets are included in Appendix at the end of this study guide The entire group of 14 sign
64. rom a conductor to ground Read the indicated value Accurately diagnose and repair problems if any exist Compare the reading to component specifications RVIA 11 20 2011 70 of 70 RVDA The National RV Dealers Association Powered by Dealers RVDA The National RV Dealers Association 3930 University Drive Fairfax VA 22030 2515 Tel 703 591 7130 Fax 703 359 0152 www rvda org RVIA Recreation Vehicle Industry Association 1896 Preston White Drive Reston VA 20191 4363 Tel 703 620 6003 Fax 703 620 5071 www rvia org RVDA The National RV Dealers Association Powered by Dealers RVDA The National RV Dealers Association 3930 University Drive Fairfax VA 22030 2515 Tel 703 591 7130 Fax 703 359 0152 www rvda org RVIA Recreation Vehicle Industry Association 1896 Preston White Drive Reston VA 20191 4363 Tel 703 620 6003 Fax 703 620 5071 www rvia org
65. s 086 At what interval are ASME tanks required to be recertified A Every five years B Every ten years C There is no requirement to recertify D Whenever the service valve or other appurtenance is replaced 087 RVIA sanctions what propane tests A Combustibility B Container pressure C Regulator lockup D Vaporization rate 088 Correct installation of a propane regulator requires setting the diaphragm position positioning vent downward within 45 of the vertical plane using lubricant on the threads testing the OPD for proper operation gow 089 What percentage of propane flow is required when performing a propane Regulator Lock up Test A 0 B 25 C 50 D 75 090 Foreign material in a propane regulator may cause increasing system pressure after lock up liquid propane to be introduced into the piping system oily residue at or near the vent leaking past the diaphragm gow 091 Which type of propane connection requires sealant A Flared B Pipe threaded C ACME threaded D POL fitting RVIA 11 20 2011 28 of 70 092 A propane timed pressure drop test may be invalid if run for longer than 3 minutes initial system pressure is reduced to 8 water column a U tube monometer is used piping temperature increases during test 093 Corrosion be created propane piping system by leak detector solutions containing ammonia B the
66. sistance 041 A circuit must be de energized to measure resistance B voltage C amperage D wattage 042 A fusible link is designed to protect a DC circuit from incorrect directional current flow B too much voltage C too much amperage All of the above 043 A complete circuit consists of A source conductor and load B battery switch and light C conductor switch and power using device D power supply wire and conductor 044 An RV 120V supply panel must have A breakers B the neutral bus grounded to the panelboard C main and secondary breakers D anisolated neutral 045 Resistance x Voltage A Current B Ohms C Impedance D Wattage 046 In a simple circuit consisting of a battery load and conductor if the voltage decreases slightly the amperage A decreases slightly B increases slightly C does not change D fluctuates 047 ATC mini and maxi refer to what type of fuse A Cylinder B Slow blow C Blade D Auto reset 048 Which symbol represents a chassis ground RVIA 11 20 2011 22 of 70 gt D gt 049 Which symbol represents DPST o olo oe o A B C D gt 00 gt 050 When components having resistance are connected in parallel the composite resistance can be calculated by adding the resistance of all components averaging the resistance of all
67. stified Stan Gibilisco Electrical and Propane Sign off Sheets Taking the test Get plenty of rest the night before so you will be alert and efficient Arrive early enough to find the building and testing room Be sure to bring your test center admission ticket and current photo 1 0 The proctor will instruct you in filling out the answer booklet if taking the written test or how to log on to the computer if you are taking the on line test Once testing has begun keep track of time Do not spend too long on any single question Be sure to read each question carefully so you understand exactly what is being asked Do not mark answers in the test booklet if taking the written test they must be marked on the answer sheet Your test will not be scored if your answers are not on the answer sheet If a question is difficult mark the answer that you think is correct and put a check by it in the test booklet Computer based tests allow you to do this on screen Then go on to the next question If you finish before time is up you may go back to the question that you have checked It is to your advantage to answer every question Do not leave any answers blank Your score will be based only on the number of correct answers you give RV Registered Technician Core Standards Chart A PROPANE SYSTEMS 1 Comply with propane safety procedures Avoid propane contact with skin to prevent tissue damage Avoid overfilling containers to prevent
68. t the electronic leak detector using a butane lighter Operate the electronic leak detector per the manufactures recommendation Repair or tighten connections using backup wrenches Document results Using non corrosive leak detector solution Did the candidate Open service valve to pressurize propane system Turn off all appliances Cover each connection with the solution Monitor for bubbles if leak is present Repair or tighten connections using backup wrenches Document results RVIA 11 20 2011 64 of 70 Sign off sheet revised June 23 2008 Appendix 1 Signoff Sheets AC Electrical System Tests Sign Off Sheet Printed Technician Name ID Number Address Telephone Number City State Zip Code STEP Initials Date Hot Skin Test Did the candidate Prepare Documentation Make sure shore line is plugged into 120VAC source Set VOM to AC voltage scale Place one probe on a bare metal surface of the RV i e Door frame Chassis Place the other probe to an earth ground source i e water pipe Repeat the test at least twice changing the placement of the probe If there is no voltage reading present the skin is not hot Any voltage reading indicates an electrical short or reverse polarity Accurately diagnose and repair problems if any exist Document Results Polarity Test Did the can
69. t where the current is to be measured Install the VOM leads in series between the source of current and the device being measured Turn on the power to the device being measured Read the indicated value Turn off power to the circuit Return the circuit to its original condition Measuring Resistance Ohms Did the candidate il Turn off electrical power Isolate the component from the circuit Set the VOM to the proper Ohms scale Read results on the meter RVIA 11 20 2011 69 of 70 Sign off sheet revised June 23 2008 Appendix 1 Signoff Sheets Sign off sheet revised June 23 2008 STEP Initials Date Checking Continuity Did the candidate il Turn off all VDC power Isolate the component to be checked by disconnecting all the wires Set the VOM to the Ohms scale Place one probe on each terminal of the item to be checked Shorted Circuit 1 Two wires touching or a closed switch Meter reading will show Zero Ohms sometimes a meter will read 1 to 3 ohms due to resistance in the meter leads Open Circuit 1 Wire cut in half or a switch that wont make continuity Meter reading will show infinity 1 most digital meters will read OL OFL Grounded Circuit i e Bare wire touching ground Meter will read the same way as a short zero when the circuit is tested f
70. to 36 38 cu ft of vapor is under 196 psi pressure in a closed container gt 014 What is the maximum percentage of propane vapor in the atmosphere that will ignite A 2 15 9 6 11 0 D 100 015 The chemical that gives propane its odor is butane ethylene magnesium sulfate ethel mercaptan 016 Temperature of a propane container affects the flow of vapor from the container number of BTU s available range of combustibility boiling point gt 017 14 inches water column is the A minimum propane system pressure B maximum depth of liquid within container C first stage regulator pressure D maximum lock up regulator pressure 018 What reduces propane container pressure to 10 PSI RVIA 11 20 2011 18 of 70 First stage of a regulator Second stage of a regulator Maximum flow valve Pressure relief valve gt 019 For each 10 degrees propane is warmed its volume decreases 10 decreases 1 5 increases 1 5 increases 10 gt 020 Approximate number of BTUs in a 20 propane cylinder A 150 000 B 275 000 C 345 000 D 960 000 021 Propane gas is twice as light as air 5 times heavier than air C equal in weight to air D 1 5 times heavier than air 022 When the pressure in a container is near zero as a result of cooling from use it has outrun the rate of vaporization B
71. to the regulator to the test apparatus Attach the manometer hose to hose barb on the test apparatus making sure the gas cock is closed Slowly turn the propane supply back on at the service valve Conduct a leak test to ensure all connections are leak free RVIA 11 20 2011 61 of 70 Sign off sheet revised June 23 2008 Appendix 1 Signoff Sheets STEP Initials Date Did the Candidate Prepare documentation work order PDI form etc to record the Time Pressure Drop Test results Ensure the temperature of both air and piping was approximately the same Ensure a uniform temperature was maintained throughout the test procedure Ensure the propane system is turned off at the service valve Ensure all appliances are turned off Ensure all open pilot lights are turned off Turn propane system on slowly at the service valve to bring pressure to between 7 5 and 8 5 W C Turn propane off at the service valve Monitor the manometer for a period of three minutes Locate and repair leak s and retest until a successful test no pressure drop is accomplished See Leak Test sign off sheet Bleed the propane pressure from the system using the gas cock on the Test Kit Remove the Test Kit from the system and reattach the low pressure hose or piping Turn propane system on at the service valve Leak test the low pressure hose or piping connection Document test resu
72. ution 215 The diode tester is designed to test diodes found in fan and limit switches B relay coils C battery isolators and converter systems D audio sound systems 216 When connecting or disconnecting a propane line at an appliance you should use channel locks B adjustable wrenches C pliers D two open end wrenches 217 Which of the following two resources are the source of propane gas in the refining process A Natural gas and kerosene B Natural gas and crude oil C Crude oil and kerosene D Crude oil and oxygen 218 What is the boiling temperature of propane at sea level 15 9 C 12 F 24 C 22 30 C 44 42 219 When temperature increases propane will freeze B expand C contract D not respond 220 Whenever you transport or store disconnected propane containers you should always A use a plug or cap in the service opening B remove propane from the container C lay the containers down for increased stability D transport the containers in groups of at least five 221 List the typical safety equipment and clothing that a technician should use and wear while purging a propane container A Protective eye wear B Heavy gloves C Protective footwear D All of the above 222 The minimum clearance from any source of ignition when purging is feet A 10 B 15 RVIA 11 20 2011 47 of 70 223 A DOT c
73. ve 159 If the needle of an analog voltmeter deflects to the right and off the scale you should change to a higher voltage scale change to a lower voltage scale reverse the test leads use a test light oop 160 When using a DC ammeter to measure current the meter must be connected in in series with the circuit across the component across the circuit in parallel with the circuit gt 161 When actually measuring the current in a circuit A the power must be turned off for safety reasons B the power must be turned on C the power must be filtered with a shunt D the two leads must be parallel with the load 162 When using an ohmmeter to measure the resistance of a component in a circuit one lead of the component should be A disconnected B grounded to acommon ground C shored to another component lead D one load of the meter must be grounded to a common ground 163 What current is drawn from a 120V source by a 3 KW heating element 36 67 267 30 3 67A D 25A 164 What is the current through a 4 7k ohm at 13 5 volts 3mA B 2 9mA C 2 0 D 2 4mA 165 Chemically created electricity is commonly produced from A 110 volt outlets B generators C batteries D gasoline 166 When measuring the amperage of a circuit the meter must be connected A in parallel RVIA 11 20 2011 40 of 70 8 with power off C inseries in p
74. ween 3 and 4 approximately 20 between 35 and 40 gt 257 The first stage of a two stage regulator is designed to reduce pressure in the first stage to 6 8 ounces 10 12 pounds per square inch 14 16 water column 20 22 pounds per square inch gt 258 An LP regulator must have rated capacity equal to or greater than 2 diameter if round and 2 x 4 if rectangular the BTU input of the largest appliance the wetted surface potential of the smallest tank the total BTU input of all appliances gt 259 Water capacity of an ASME tank is in A quarts B gallons C pounds D ounces 260 Using the Table below what is the maximum allowable depth for a dent 2 7 8 in diameter DOT cylinder RVIA 11 20 2011 52 of 70 Maximum Allowable Dent Depth for DOT TC Cylinders NLPFA 4003 Table Ea Dent Dent Dent Diameter Diameter Diameter Inches Inches Inches 2 432 4 8 86 a4 7 44 12 478 11 8 58 9 144 54 0 13 8 53 8 938 1 2 55 2 15 8 558 _ 13 4 53 4 gt 178 578 2 2 8 21 4 122 644 044 2 23 6 24 638 1 04 1 2 2
75. ylinder utilizes a single valve designed for 3 functions filling shut off and regulation B purging C relief D by pass 224 A DOT cylinder vent stem dip tube A is usually the same length on different size cylinders B has its length stamped on the valve guard C is easily removed by unscrewing the liquid level outage valve D needs to replaced before recertifying the cylinder 225 In closing a propane container service valve you should use only A socket wrenches B two open end wrenches C hands D two adjustable wrenches 226 Which of the following is NOT a propane container Fill valve B High pressure pigtail C Liquid level gauge D Service valve 227 Which of the following valves is the primary valve on a DOT cylinder Excess flow valve B Liquid level outage valve C Service valve D Fill valve 228 A device used to withdraw propane vapor from the tank s service valve is called a A suction hose B low pressure hose C decompression tube D vapor withdrawal tube 229 The POL valve has right handed threads acme threads no threads left handed threads gt 230 The main supply on off valve for the propane system is the service valve shutoff valve assembly fill valve excess flow valve auto stop valve gt 11 20 2011 48 of 70 231 The internal float device that is connecte

Download Pdf Manuals

Related Search

Related Contents

USER'S MANUAL OF VECTOR5  3Com Door TECHD-0000000050 Owner's Manual  Corolla Wagon 2002- - Toyota  ASSEMBLY INSTRUCTIONS  Eurofase 16622-012 Installation Guide  Dépose é Aspirer 1 `hui1e hydrau1ique avec V.A.G 1 358 A  Tiger Lights Out Cube 7-592 User's Manual  Frigidaire FPCP07D7MS Product Specifications Sheet    value timer water softener installation manual  

Copyright © All rights reserved. Failed to retrieve file