5. What is the maximum number of#18 TEW control conductors permitted to be installed into a 6 inch rigid metal conduit? a. 196 b. 138 c. 259 d.
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1 I Practice Exam Questions :loo(p c:.e.c A construction drawing has a scale of 1:200. If a line on the drawing measured 11.5mm, what would be the actual measured length on the project? a. 2300cm b. 230mm c. 2.3 meters d mm 2. Which section in a construction set of drawings would you find information on ventilation ducts? a. structural b. mechanical c. architectural d. electrical 3. What is the maximum number of 90 bends permitted in a run of rigid PVC if installed underground? a. 2 b. 6 c. 4 d. unlimited 4. When installing branch circuit conductors underground, what is the minimum depth of the sand that must be under the conductors? a. 50mm b. 75mm c. 100mm d. 150mm 5. What is the maximum number of#18 TEW control conductors permitted to be installed into a 6 inch rigid metal conduit? a. 196 b. 138 c. 259 d What is the maximum current rating offour-1250kcmil RW-90 Al (XLPE) 600V no jacket conductors installed in a run of EMT for a volt, three phase, four wire feeder? a. 424 amps b. 516 amps c. 530 amps d. 645 amps 7. What is the maximum rating/setting of over-current device required to protect a residential branch circuit that has two baseboard heaters connected? a. 15 amps b. 20 amps c. 25 amps d. 30 amps 8. An isolation switch is required to be installed on a commercial roof-top heating/cooling unit. What is the minimum enclosure requirement in this case? a. CSA enclosure 1 b. CSA enclosure 3R c. CSA enclosure 5 d. CSA enclosure What is the minimum size of conductor permitted to be used for a class 2 circuit in a run of ENT? a.24awg b. 22 AWG c. 19 AWG d. 16 AWG
2 2 Practice Exam Ouestions 10. What is the minimum separation required between power conductors and communication conductors when they are installed in the same trench, and at the same depth? a. 150mm b. 300mm c. 600mm d. 1 meter 11. Two baseboard heaters are installed on a residential branch circuit and are connected using 14/2 NMD-90. If the heaters are 1000 watt and 1500 watt respectively, what is the maximum length of the 14/2 NMD-90 cable? a. 6.1 meters b meters c meters d meters 12. What is the minimum size of bond conductor required in a run ofpvc, that supplies a 25 Hp, 600 volt, 3-phase refrigeration compressor, that is protected using time-delay fuses, and fed using RW -90 XLPE conductors? a. #14AWG b. #12AWG c. #10AWG d. #8AWG 13. What is the purpose of a lightning arrester? a. to prevent lightning from striking an electrical installation b. to prevent transient voltages from accumulating c. to monitor how many times lightning strikes an electrical installation d. to conduct excess voltage (from a lightning strike) to ground 14. When installing auxiliary gutter, what is the maximum distance between supports? a. 1 meter b. 1.5 meters c. 2 meters d. 3 meters 15. What is the maximum amount of current that anyone conductor can carry in a 22/6 ELC cable? a. 2 amps b. 2.5 amps c. 3 amps d. 3.5 amps 16. What is the recommended tightening torque, when terminating a 750kcmil copper conductor to a lug that takes a W' hex socket? a newton-meters b newton-meters c newton-meters d newton-meters
3 3 Practice Exam Questions 17. What is the minimum dimension of "X" in the pull box shown? a. 424mm b. 504mm c. 378mm d. 318mm 18. What is the minimum ampacity of the RW-90 (XLPE) primary conductors that feed a 600 volt primary, 120/208 volt secondary, 112kV A 3-phase, Dry-Type transformer? a. #1 R W -90 (XLPE) b. #1/0 RW -90 (XLPE) c. #2/0 RW-90 (XLPE) d. #3/0 R W -90 (XLPE) 19. A 600 volt primary, 120/208 volt secondary, dry-type transformer has 70 amp time-delay fuses for it's primary over-current protection. A lighting panel is installed on the secondary side directly to the transformer with no over-current protection. Based on this information, what is the minimum rating of the lighting panel? a. 100 amps b. 200 amps c. 225 amps d. 400 amps 20. What is the minimum number of conductors required to connect the metallic gradient control mat to the switch operating handle grounding conductor, for a high-voltage gang-operated switch? a. two b. one c. three d. four 21. What is the minimum size of copper conductor required to supply a control circuit of 5 amps at 600 volts if using 2 parallel runs? a. #1/0 AWG b. #12AWG c. #14AWG d. #18 AWG 22. Using the diagram below, what is the minimum number of conductors required in the conduit marked "X"? Sta Sta two b. three c. four d. five Start/Sto Station Motor 0 Starter rt/stop tio 1 I Conduit "X" I
4 4 Practice Exam Ouestions 23. Which of-the following types of cables meet the minimum flame spread requirements for buildings of non-combustible construction without additional fire protection? a. jacketed and unmarked armoured cable b. NMW-U c. NMD-90 d. AC Where would you find information on hazardous materials in a commercial establishment? a. posted in the main office b. on WHMIS information sheets c. on safety material handling sheets d. on material safety data sheets 25. In which of the following is it permitted to install high voltage conductors? a. wlreway b. EMT c. rigid PVC d. elevator shaft 26. What is the purpose of installing GFCI protection? a. to monitor neutral current b. to monitor current in the ungrounded conductor c. to monitor leakage current d. to monitor current in the bond conductor 27. What does the symbol to the right indicate? a. a check valve b. a filter c. a receiver d. a pneumatic valve 28. Three cable trays are to be installed in a tier. What is the minimum space between cable trays? a. 600mm b.450mm c. 300mm d. 150mm 29. A 40 HP, 600 volt, 3-phase synchronous motor has a marked service factor of 1.1 and is protected with time-delay fuses. What is the minimum size of bond conductor required in the flexible metal conduit that supplies this motor, if RW-90 (XLPE, 600 volt, unjacketed) conductors are used? a. #12AWG b. #loawg c. #8 AWG d. #6AWG
5 5 30. What is the maximum rating/setting of the over-current device used to protect fluorescent lighting fixtures in a commercial building if the fixtures are fed with #12/2 AC-90 cables? a. 15 amps b. 20 amps c. 25 amps d. 30 amps 31. What is the maximum ampacity of a #10/4 SOW flexible cord that is used to feed a 3-phase, 600 volt pump motor? a. 60 amps b. 45 amps c. 30 amps d. 25 amps 32. A line voltage switch is to be installed in an elevator machine room, what is the minimum enclosure type necessary for this installation? a. CSA enclosure type 1 b. CSA enclosure type 2 c. CSA enclosure type 5 d. CSA enclosure type What is the maximum distance from a panelboard to the first support, on a run of27mm EMT installed in a commercial building? a. 3.0 meters b. 2.0 meters c. 1.5 meters d. 1.0 meters 34. You have just installed four baseboard heaters on the same branch circuit in a dwelling unit. If the circuit is fed using #8/2 NMD-90, what is the maximum rating/setting of the over-current device protecting this circuit? a. 15 amps b. 20 amps c. 30 amps d. 40 amps 35. When installing insulated conductors in the same raceway that have different voltage ratings, how is the overall voltage rating determined? a. by using a voltage correction factor b. by using the lowest voltage rating c. by using the highest voltage rating d. by using the average voltage rating 36. What is the proper procedure for terminating stranded aluminum conductors? a. apply compound over the conductor and connector after installation b. apply compound over the conductor and connector before installation c. apply compound over the conductor and wipe off the excess before installation d. clean the conductor and connector, then apply compound over both before installation
6 6 Practice Exam Ouestions 37. When using solid state devices, which of the following is a code requirement? a. must be used to isolate equipment for maintenance b. must prevent any voltage feedback c. must NOT be used for computer equipment d. must provide an additional disconnecting means 38. Where can a bare high-voltage bus be installed? a. in an electrical equipment vault b. indoors in an electrical equipment room c. on the ceiling of an industrial plant d. above an overhead crane 39. When can a final inspection be done on the electrical installation of a single residential dwelling by the inspection department? a. after the rough-in and service inspection b. after the service has been energized c. after the roof and windows have been installed d. after the entire electrical installation is complete 40. A type B & C fire extinguisher has what chemicals inside? a. halon, C02, and oxygen b. co2 and oxygen c. water and baking soda d. halon and C An electrician is required to use a powder actuated tool to fasten materials to a structure. Which of the following materials could the powder actuated tool be used to safely fasten? a. steel to wood b. concrete to wood c. wood to concrete d. wood to wood 42. What is the maximum current rating of code fuses? a. 600 amps b. 400 amps c. 225 amps d. 30 amps 43. When can an electrician rough-in the electrical wiring of a single family dwelling? a. before the mechanical trades b. after the mechanical trades c. before the plumber d. after the plumber
7 7 Practice Exam Questions 44. What is the maximum distance that an auxiliary gutter can extend from the equipment that it is connected to? a. 3 m beyond the equipment b. 4.5 m beyond the equipment c. 6 m beyond the equipment d. 7.5 m beyond the equipment 45. When is it permissible to splice a service neutral conductor? a. in a meter base b. in the service lateral conduit/raceway c. underground d. at the service entrance head 46. What is the maximum voltage rating of a # 3 TW -75 aluminum conductor? a. 300 volts b. 600 volts c volts d volts 47. What size of single conductor RW-75 aluminum conductors (installed in free air) are required to supply a single-phase, 240 volt, non-continuous load of amps, if the conductors are present and in contact with each other? a. #1 AWG b. #2AWG c. #1I0AWG d. #3/0 AWG 48. Which of the following systems is NOT required to be grounded? a. 347 volt lighting systems b. 347/600 volt services c. 208 volt electric heating systems d. electric arc furnaces 49. Which of the following conditions can rigid PVC conduit be used? a. in a class III hazardous location b. in fiberglass insulation c. in grade level concrete slabs d. in a paint spray booth 50. Where must the V-ground slot be located of 5-15R receptacles used in the bedroom area of a dwelling unit, if they are installed in a vertical plane? a. uppermost b. lowermost c. doesn't matter d. the receptacles cannot be mounted on a vertical plane
8 8 ' Practice Exam Questions 51. Which of the following boxes can be used in masonry construction? a LA b L c d. MBD l 52. What is the largest size of solid conductor that is permitted to be laid into a raceway? a. #12AWG b. #loawg c. #8AWG d. #6AWG 53. What is the minimum size of single conductor RW-90 XLPE 600 volt (no jacket) run arielly between buildings, required to supply a circuit with a 35 amp continuous load? a. #12AWG b. #loawg c. #8AWG d. #6AWG 54. There are three-14/3 NMD~90 cables that run through a wooden support beam that is 750mm thick. What is the maximum amount of non-continuous load that can be connected to each insulated wire of these cables? a. 15 amps b. 12 amps c amps d. 18 amps 55. What is the allowable ampacity of#l AWG type NS-75 Aluminum triplex cable that feeds a residential overhead service? a. 125 amps b. 140 amps c. 160 amps d. 185 amps 56. What is the minimum size ofrw-90 XLPE 600 volt (no jacket) aluminum conductors that are required to supply a 200 amp, 120/240 volt, single-phase residential service? a. #4/0AWG b. #250 kcmil c. #3/0 AWG d. #2/0AWG 57. What is the minimum size of copper ground conductor that is permitted to be run on the surface of wood joists without the use of mechanical protection? a. #10AWG b. #8 AWG c. #6AWG d. #4AWG
9 9 Practice Exam Questions 58. What is the outside diameter of a #8 RW-90 XLPE aluminum conductor? a mm b mm c. 5.99mm d mm 59. When is bonding equipment to the grounded system neutral conductor permitted? a. anywhere in the system b. when a system is resistance grounded c. for a pole-top lighting system d. on the supply side of the main service switch 60. What is the maximum load in watts that is permitted to be connected to a 20 amp, 2-pole, circuit breaker that is fed from a 120/240 volt, single-phase, three-wire service if#10/2 AC-90 cable is used as the conductors? a watts b watts c watts d watts 61. What type of wiring method does a portable cord-connected, 2000 watt, 240 volt, electric heater require to connect it to an electrical supply? a. AC-90 b. SO c. NMD-90 d. RA When is an inspection application to be filed with the inspection department? a. within 48 hours of beginning electrical work on a commercial installation b. at the same time that the permit is taken out c. at the same time as work commences on the installation d. within one week of commencing work on the installation 63. Your boss sends you to purchase some NMW-U cable to make-up a string of temporary lights for a construction site. What is the minimum size of conductor that you must purchase? a. #16 AWG copper b. #14 AWG copper c. #12 AWG copper d. #10 AWG copper 64. What is the minimum distance from the outer surface of metal studs, joists or other similar metal members, when running armoured cables through them, before mechanical protection is required? a. 50mm b. 30mm c. 25mm d.32mm
10 10 Practice Exam Ouestions 65. How far around a wire binding screw must an aluminum conductor extend to be properly terminated? a. half-way b. two-thirds c. three-quarters d. all the way around 66. When mounting a device box to a metal stud, what is the maximum distance from the back or end of the box that the mounting screws can project into the box? a. 3.2mm b. 6.4mm c mm d. 25 mm 67. What is the minimum thickness of boards when used to support a 4-gang switch box to wooden studs in a residential installation? a. 13 mm b. 19mm c. 25 mm d. 40mm 68. What is the minimum bending radius for AC-90 cables? a. six times the internal diameter b. ten times the external diameter c. ten times the internal diameter d. six times the external diameter 69. What is the maximum volume of box that can be supported by a raceway? a ml b ml c ml d ml 70. A heat pump rated 40 amps, 120 volts, single-phase is installed 40 meters away from the source of supply. What is the minimum size ofr-90 XLPE conductors that are required to keep the voltage drop within code requirements? a. #10 R-90 XLPE b. #8 R-90 XLPE c. #6 R-90 XLPE d. #4 R-90 XLPE 71. There is a 24 volt emergency lighting circuit with a rating of 60 amp-hours at a maximum of 200 watts of connected load. What length of time can this system operate at maximum capacity? a. 6.0 hours b. 6.5 hours c. 7.0 hours d. 7.2 hours
11 11 Practice Exam Questions 72. A split-phase AC motor has three leads. The leads are marked A, Band C. If the resistance readings between A and B = 5250, A and C = 7750, and Band C = 2500, which leads belong to the run winding? a. AandB b. AandC c. B andc d. C and A 73. A 3-phase capacitor bank is rated at 60 amps at 600 volts. What is the minimum size of 3-wire Teck-90 cable that can be used to supply this capacitor bank? a. #8/3 Teck-90 b. #4/3 Teck-90 c. #2/3 Teck-90 d. #00/3 Teck What is the maximum rating ofthe overload relays that are used to protect a 40 Hp, 600 volt, 3- phase refrigeration compressor? a amps b amps c amps d amps 75. Where is the proper location of the disconnecting means for an un-interruptible power supply to be when used to isolate the UPS from the building's power system? a. on the supply side of the UPS b. between the UPS and the load c. not required d. on the load side of the transfer switch 76. What is the minimum size of conductor that is permitted to be installed in a run of PVC for a fire alarm system? a. #12 TW-75 b. #14 R90 XLPE c. #16TEW d. #18 GTF 77. When performing preventative maintenance on a reversing motor starter, you notice that a contactor is humming very loudly. What is the likely cause? a. the input voltage is too high b. the input voltage is too low c. the contactor has loose laminations d. the shaded pole is broken or missing
12 1 2 Practice Exam Ouestions 78. What would be the result of your weld, if the mold you were using for a thermit-weld was damp or wet? a. the weld would be very shinny b. the weld would be porous c. the weld would be very smooth d. the weld would be normal 79. If the peak voltage is volts, what will an AC voltmeter read? a volts b. 110 volts c. 120 volts d volts 80. AN electrical connection needs to be made to a portable motor, which type of equipment wire is required? a. type S b. festoon c. type GTF d. type SJ 81. The correct wiring method to be used for electrical equipment in a class 1 Zone 1 location must be: a. rigid PVC b. threaded metal conduit c. NMW-U d. festoon 82. A welder has a duty cycle of 70% and an FLA of 32 amps. Calculate the minimum ampacity of the supply conductors for this welder as per code. a. 40 amps b. 32 amps c amps d amps 83. Three-way switches are required to control the light in a residential stairway: a. ifthere is a doorway in the basement b. if there are 4 or more risers on the stairway c. if the switch is located more than 3.5 meters from the door d. only if the stairway leads to another level in the house 84. What is the minimum ampacity of the conductors required to supply a 60 amp fusible switch from a 400 amp splitter if the tap conductor length is 4.5 meters? a. 400 amps b. 135 amps c. 100 amps d. 60 amps
13 13 Practice Exam Questions 85. What is the minimum distance that the termination point of the supply conductors must be, from any part of a 150 Hp motor? a mm b. 900mm c. 600mm d. 450mm 86. What is the minimum temperature rating of the supply conductors for a 75 Hp, 575 volt, 3- phase, class "F", totally enclosed non-ventilated, squirrel cage induction motor, connected 4Y? a. 110 C b. 90 C c. 75 C d. 125 C 87. What would happen if the centrifugal switch in a split-phase, I-phase, capacitor start motor was stuck in the open position? a. the motor would start slowly in reverse b. the motor would not start but current would flow to the run winding c. the starting torque would be greatly reduced d. the motor would start but no current would flow to the start winding 88. What is the proper type of insulating tape to be used for overhead services, when making connections at the service head? a. rubber splicing tape b. self-sealing thermoplastic tape c. standard vinyl electrical tape d. weather-resistant epoxy coated tape 89. What is the CSA configuration for a residential dryer receptacle? a. 5-15R b. 5-30R c R d. 6-30R 90. What is the minimum size of RW-90 XLPE (600 volt, unjacketed) conductors that are required for a 1000 amp, 120/208 volt, 3-phase service, if they are installed using detail 3 of Diagram B4-4? a. 350 kcmil RW-90 b. 500 kcmil RW-90 c. 600 kcmil RW-90 d. 750 kcmil RW Which of the following is not a requirement when installing deck boxes in close proximity to inground pools? a. must be installed above the normal water level of the pool b. must have provisions for 3 bond wires inside the box and 1-#6 AWG outside c. must be installed on GFCI protected circuits only d. must be installed so that the top of the box is level with the pool deck
14 14 Practice Exam Ouestions 92. When grounding a high-voltage outdoor station, what is the minimum number of ground rod electrodes necessary to complete the station ground electrode? a. one rod, 3 m long and 19 mm diameter b. four rods, 3 m long and 15.8 mm diameter c. two rods, 3 m long and 19 mm diameter d. four rods, 3 m long and 19 mm diameter 93. What is the minimum size of ground wire required to connect the non-current carrying metal parts of a pothead to the station ground electrode? a. #2/0 A WG copper b. #3/0 A WG copper c. #6 AWG copper d. #4 AWG copper 94. What is the main purpose of the semi-conducting tape used in a high-voltage stress cone? a. to bleed excess voltage to ground b. to determine the voltage rating of the stress cone c. to insulate the termination from the ground lead connection d. to relieve mechanical stress at the termination 95. What is the minimum size of ground wire required for the proper installation of a 1500 watt, 125 volt, heated livestock watering bowl in a feedlot? a. #14AWG b. #12AWG c. #10AWG d. #6AWG 96. Which of the following luminaires are permitted to be installed in a multi-purpose gymnasium? a. standard 4' 2-lamp T8 fluorescent wrap b. 500 watt incandescent potlight c. 400 watt HPS fixture with thermal protection d. standard 8' 2 lamp T12 fluorescent with metal cage 97. What is the minimum number of open breaker spaces that must be left for future use in a 100 amp, 120/240 volt, I-phase residential panel? a. one b. two c. three d. four 98. What is the minimum width and thickness of a copper bonding strap, when used to bond a metal transformer enclosure? a. 19 mm wide and 1.4 mm thick b. 12 mm wide and 1.2 mm thick c. 16 mm wide and 1.6 mm thick d. 19 mm wide and 1.2 mm thick
15 e. f. Practice Exam Ouestions When installing a 5-15R receptacle (single-phase 3-wire circuit) on a recreational vehicle lot, what should be the configuration of the ground pin (if the receptacle is mounted on a vertical plane)? a. uppermost b. lowermost c. doesn't matter d. cannot be installed on a vertical plane 100. Which of the following methods should be used when drying the windings of a distribution transformer? a. short the secondary, apply primary voltage b. short the primary, apply secondary voltage c. apply an appropriate amount of DC to the primary, short the secondary d. short the secondary, apply secondary voltage to the primary 101. Based on the readings given in the diagram to the right, what is the problem? a. line 3 fuse is blown b. line2 fuse is blown c. line 1 fuse is blown d. all three fuses are blown )'~.'.~.,.. "\ Volts rl /':>;7\ Volts 102. Using the diagram to the right, what is the minimum number of control wires that must be installed in conduit "A" to control a hoist? The hoist can only move in the direction on the control station when the pushbutton is held closed. a. three up Down b. five c. seven d. nine agrllp.t,k t.t~, Ea.~t r- \tv't'~t I, 103. What is the maximum rating/setting of the overload devices that can be used to protect a 30Hp, 460 volt, 3-phase synchronous motor/generator with a marked service factor of 1.2? a amps b amps c amps d amps
16 g. Practice Exam Ouestions Using the drawing to the right, which set of contacts should be closed in order for the wound rotor motor to reach its maximum speed? a. contact set "A" c b. contact set "B" c. contact set "C" d. contact set "D" D 105. A single-phase commercial store service at 120/240 volts has an ammeter reading of 170 amps and a wattmeter reading of36000 watts. What is the power factor of this service? a. 94% b.88% c. 82% d.70% 106. Four, 600 volt, 3-phase induction motors are connected to a splitter. What is the minimum size of RW-90 XLPE conductors that fed the splitter if the motors have ratings of20 Hp, 20 Hp, 15 Hp and 10 Hp respectively? a. #6AWG b. #4AWG c. #3 AWG d. #2 AWG 107. What is the maximum number of consumer services in abuilding that may be supplied from one 347/600 volt, 3-phase supply service? a. only one b. two c. four d. five 108. Using the diagram below, which voltmeter will read 120 volts when the gas burner is deenergized? a. VM # 7 b. VM # 2 c. VM # 3 d. VM # 1
17 1 7 OPractice Exam Questions 109. What is the minimum ground depth that an intermediate post must have when part of a fence installation around electrical equipment? a. 1.0 meters b. 1.1 meters c. 1.5 meters d. 2.0 meters 110. What is the minimum size of2 conductor AC-90 that must be used to supply 84 watts of remote heads for a 12 volt DC emergency lighting system, if the cable runs a distance of 50 meters? a. #10AWG b. #8AWG c. #6AWG d. #4AWG
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