Chris
52) What's the smallest current rating for a control switch for a neon sign transformer at the rating if the rating of the transformer is 10 amps? 1. N/A 2. 20 amps 3. 30 amps 4. 40 amps
Answer 2 REF1 600.6(B)
51) For a dry cell battery to be considered a class two power supply what's the largest allowable voltage? 1. 60 2. 30 3. 24 4. 12
Answer 2 REF1 725.121(A)(5)
58) What's the smallest wire allowed by the NEC for Class 1 power limited circuits? 1. 22 AWG 2. 18 AWG 3. 16 AWG 4. 14 AWG
Answer 2 REF1 725.49(A)
93) Areas having limited degrees that are subject to the accumulation of toxic or flammable contaminants or an oxygen deficient atmosphere are considered by OSHA to 1. Void spaces 2. Confined spaces 3. Limited spaces 4. Non-accessible spaces
Answer 2 REF1 GENERAL KNOWLEDGE
11) An electromotive force is measured in 1. Amps 2. Volts 3. Coulombo 4. Farads
Answer 2 REF1 General Knowledge
24) What's the voltage to ground on the "A" phase of a 240 volt, 3 phase, 4 wire system? 1. 0 volts 2. 120 volts 3. 208 volts 4. 240 volts
Answer 2 REF1 General Knowledge
19) A hospital has a grounding point in a critical care area adjacent to the patient vicinity. What is the smallest ground wire size allowed? 1. #14 2. #12 3. #10 4. #8
Answer 3 REF1 517.1(C)- NEC 2011 REF2 517.1(D)- NEC 2014
41) A paddle fan to be set up on a screened room ceiling support beam above an outdoor pool MUST be what smallest height above the pool water level? 1. 6 feet 2. 8 feet 3. 10 feet 4. 12 feet
Answer 4 REF1 680.22(B)(1)
59) The basic electrical unit of current flow is the 1. Ohm 2. Volt 3. Watt 4. Ampere
Answer 4 REF1 GENERAL KNOWLEDGE
71) Ampacity is the current in amperes a wire can carry continuously under the conditions of use without greater than its 1. Temperature rating 2. Voltage rating 3. Ampacity rating 4. Continuous load rating
Answer 1 REF1 100 DEF
56) Wiring to elevator or wheelchair lift door interlock conductor will be rated 1. Flame retardant and suited for temperatures of not below 200 degrees C 2. THN and rated to 170 degrees F 3. Al/Cu and rated to 100 degrees C 4. Smallest 14 AWG
Answer 1 REF1 620.11(A)
92) New raised floor set upation cables for info technology equipment may have a listing of 1. DP 2. Se 3. USE 4. NM
Answer 1 REF1 645.5(E)(6)
36) An ungrounded wire can be identified by the color 1. Black 2. Green 3. White 4. Grey
Answer 1 REF1 General Knowledge
43) What's the largest load allowed on a cord and plug connected neon sign circuit, if a 20 amp breaker is utilized? 1. 12 amps 2. 15 amps 3. 16 amps 4. 20 amps
Answer 3 REF1 210.19(A)(1)
97) What's the smallest length of a residential unit hallway for which a receptacle is REQUIRED? 1. 4 ft 2. 8 ft 3. 10 ft 4. 12 ft
Answer 3 REF1 210.52(H)
39) A farm has 240 volt, single phase, dairy set upation with a load of 18,000 VA, a second load of 16,000 VA, and a third load of 10,000 VA. What's the total load in amps? 1. 175 amps 2. 167 amps 3. 152 amps 4. 143 amps
Answer 3 REF1 220.103 REF2 (18000VA @ 100%, 12000VA @ 75%, 10000VA @ 65%) / 240V
4) If metal underground water pipe is utilized for grounding, it will have a smallest of how many feet in contact with the earth? 1. 6 Feet 2. 8 Feet 3. 10 Feet 4. There is no needment.
Answer 3 REF1 250.52(A)(1)
14) What's the largest size branch circuit allowed to feed the line side of a transformer for a 30-volt lighting system? 1. 15 amperes 2. 20 amperes 3. 25 amperes 4. 30 amperes
Answer 3 REF1 411.2
26) Other than class II conductor, lighting systems operating at 24 volts will have their transformer secondary current limited to a largest of 1. 15 amperes 2. 20 amperes 3. 25 amperes 4. 30 amperes
Answer 3 REF1 411.2
60) What's the approximate voltage drop of a 540 foot run of coated 4/0 copper at 480 volts, single phase with a load of 200 amps 1. 6.5 volts 2. 8.5 volts 3. 11.5 volts 4. 13.5 volts
Answer 4 REF1 CHPT. 9 TBL 8
72) When boring a hole through a wood framing member, what dimensional space MUST be maintained from the nearest edge of the member? 1. 1 inch 2. 1 ¼ inch 3. 1 ½ inch 4. 1 ⅝ inch
Answer 2 REF1 300.4(A)(1)
66) A class 1 power limited circuit has a largest voltage of 1. 10 volts 2. 20 volts 3. 30 volts 4. 40 volts
Answer 3 REF1 725.41(A)
86) The smallest working space headroom height form new set upations for service equipment and switchboards is 1. 56 in. 2. 66 in. 3. 78 in. 4. 96 in.
Answer 3 REF1 110.26(A)(3)
61) When are unutilized openings in boxes or raceways resultively closed? 1. If listed material that has equivalent thickness is utilized to close the opening of a box or raceway 2. If electrical tape of double thickness is applied to both sides of the opening 3. If approved and listed fire caulk is utilized 4. Openings cannot be sealed. The box or raceway must be replaced.
Answer 1 REF1 110.12(A)
22) What color is utilized to mark the wire having the higher voltage to ground for a switch board or panel board supplied from a 3-phase, 4 wire delta system? 1. Orange 2. White 3. Green 4. Black
Answer 1 REF1 110.15
42) Enclosures controlled by lock and key will be considered accessible to 1. Qualified persons only 2. Anyone with a key and the owner's permission 3. Local building and fire inspectors 4. Alternate trade personnel
Answer 1 REF1 110.31(A)(4) REF2 110.26(F)
15) A bedroom in a residential will have a 15 amp or 20 amp receptacle set up in every wall space 1. 2 foot or more in width 2. 3 foot or more in width 3. 4 foot or more in width 4. 6 foot or more in width
Answer 1 REF1 210.52(A)(2)(1)
90) Branch circuits that supply inductive lighting loads (ballasts, transformers, or auto-transformers) are calculated by the 1. Total ampere rating of the units 2. Total wattage of the lamps 3. 80% demand factor 4. 100% demand factor
Answer 1 REF1 220.18(B)
46) If surge arrester grounding wires are set up in metal (magnetic) raceways that are not continuous, they must be 1. Bonded at both ends 2. Grounded at both ends 3. Isolated at both ends 4. Insulated at both ends
Answer 1 REF1 280.25 REF2 250.64(E)
5) There are six current-carrying wires in a conduit. The bonding wire is 1. Not counted in the adjustment fit factor 2. Counted in the adjustment factor 3. Eliminated from the run 4. Paralled to compensate
Answer 1 REF1 310.15(B)(6)
6) What's the largest over current protection for a branch circuit that supplies a single non-motor operated utilization equipment in an occupancy? The utilization rating of 20 amps. 1. 20 amperes 2. 30 amperes 3. 40 amperes 4. 50 amperes
Answer 1 REF1 422.11(E)(1) REF2 240.4/240.6
30) A 3 phase motor controller is also the disconnect it is REQUIRED to open 1. All 3 phases 2. Only the "A" phase 3. Only the "B" and "C" phases 4. The neutral
Answer 1 REF1 430.11(A)
64) A transformer vault has an automatic sprinkler system supplying fire protection. The vault door will have a smallest fire rating of how many hours? 1. 1 hour 2. 2 hours 3. 3 hours 4. 4 hours
Answer 1 REF1 450.43(A) EX.
65) A 60 HP motor is set up in a Class 1 Zone 2 atmosphere. The approved bonding technique is 1. Motor to ground 2. Rigid conduit to motor must be grounded 3. The armature must be bonded 4. All motor sections must be bonded and run to ground
Answer 1 REF1 501.30(1)(a)
85) As a general rule, open wires of Class II and III signaling circuits will be separated by AT LEAST how many in from wires of any electrical light? 1. 2 in 2. 4 in 3. 6 in 4. 8 in
Answer 1 REF1 725.136(I)
18) One advantage a 24 volt device has over a 12 volt device is that it 1. Has a lower current draw 2. Is less expensive 3. Is readily available 4. Is smaller in size
Answer 1 REF1 General Knowledge
75) All of the subsequent are necessary by OSHA when debris is dropped through a hole in the floor without the use of chutes, except 1. Heavy plastic sheeting hanging within the boundaries of the drop area to the floor above to contain the dust and loose debris 2. Barricades a smallest of 42 in. high and not below 6 FT back from the projected edge of the opening above 3. Signs posted at each level warning of the hazards of falling materials from above 4. No removal of debris from below until debris handling from above has ceased
Answer 1 REF1 OSHA 1926
3) All of the subsequent are acceptable forms of hearing protection EXCEPT 1. Cotton inserted in the ear 2. Reusable foam ear plugs banded under the chin 3. Earmuffs mounted to a hard hat 4. Disposable foam ear plugs
Answer 1 REF1 OSHA 1926.101 C
96) What's the largest cord-and-plug connected load that can be supplied by a 15-ampere duplex receptacle on a general-purpose 15- or 20- ampere branch cord? 1. 12 amperes 2. 15 amperes 3. 16 amperes 4. 20 amperes
Answer 1 REF1 T. 210.21(B)(2)
100) Given this scenario: A residential with a 3-wire, single-phase, 120/240-volt service has a total load of 35,000 VA after all demand factors have been considered. The smallest size THWN copper wires needed for an underground service is how 1. 1 2. 1/0 3. 2/0 4. 3/0
Answer 1 REF1 T. 310.15(B)(7) REF2 I = 35000VA / 240 = 145.83 = 150A
69) Unless specifically listed otherwise, what's the largest spacing between supports for 4-inch rigid non-metallic conduit? 1. 7 ft 2. 8 ft 3. 10 ft 4. 20 ft
Answer 1 REF1 T. 352.30
84) The feeder demand factor for elevators is applied 1. To multiple elevators served by the same feeder 2. To calculate the largest amperage all elevators will draw simultaneously 3. Is utilized to size the traveler cable to the elevator car 4. To multiply banks of elevators served by different feeder wires
Answer 1 REF1 T. 620.14
28) A jewelry store has two 15 foot show windows, one on either side of the entrance way. What's the smallest number of receptacles necessary to service these windows 1. 1 per window 2. 2 per window 3. 3 per window 4. 1 above and 1 below each window
Answer 2 REF1 220.43
13) What will be the smallest space between multiple rods or piped grounding electrodes? 1. 3 foot 2. 6 foot 3. 9 foot 4. 12 foot
Answer 2 REF1 250.53(A)(3) REF2 250.53(B)
73) Where ungrounded wires enter a raceway in a cabinet, the wire will be protected by an insulating bushing if the wires are of what smallest size? 1. #2 2. #4 3. #6 4. #8
Answer 2 REF1 300.4(G)
10) What's the largest ampacity/breaker size for an aluminum AWG type TW #10? 1. 15 2. 25 3. 40 4. 50
Answer 2 REF1 310.15(B)(16) REF2 240.4(D)(6)
44) Exposed electrical non metallic tubing is allowed in any building NOT greater than how many floors above grade? 1. 2 2. 3 3. 4 4. 5
Answer 2 REF1 362.10(1)(a)
47) Each panel board will be individually protected on the supply side by NOT above how many circuit breakers? 1. 1 2. 2 3. 3 4. 6
Answer 2 REF1 408.36 EX. 2
48) An electric discharge fixture having a mogul base lamp holders is connected to a 30 ampere branch circuit by a cord and plug connection, the rating of the connector will NOT be below what percent of the fixture load current? 1. 130% 2. 125% 3. 115% 4. 100%
Answer 2 REF1 410.62(C)(2)
95) The load for the REQUIRED branch circuit set up for the supply of incandescent signs be computed at a largest of how many amperes? 1. 15 2. 20 3. 30 4. 35
Answer 2 REF1 600.5(B)(2)
81) A device for measuring current is called 1. An ohmmeter 2. An ammeter 3. A voltmeter 4. An oscilloscope
Answer 2 REF1 GENERAL KNOWLEDGE
8) Alternating current means the direction 1. Is one way only 2. Reverses at intervals 3. Does not exist 4. Pulses intermittently
Answer 2 REF1 General Knowledge
27) A transformer has a 75-kva rating, and is 460 volts, 3 phase with an efficiency of 90 degrees. What's the ampacity necessary for the primary wire? 1. 94.2 amps 2. 104.6 amps 3. 107.2 amps 4. 109.5 amps
Answer 2 REF1 OHMS Law - Ugly's book REF2 A = (75*1000)/(1.732*460*90%)
2) A 24-volt system needs a smallest working depth of 1. 2 Feet 2. 3 Feet 3. 4 Feet 4. 5 Feet
Answer 2 REF1 T. 110.26(A)(1)
31) A 480/277 volt feeder futillized at 400 amps is run from building 1 of building 2. The branch circuits originate in the 2nd building and serce mostly motor loads in that building. What's the smallest size copper grounding wire allowed to be run in the 2nd building? 1. #6 AWG 2. #3 AWG 3. #2 AWG 4. #1/0 AWG
Answer 2 REF1 T. 250.122
68) The largest ungrounded service entrance wire for an AC system is 350 kcmil copper. What's the smallest size copper wire that can the sole connection to a concrete-encased electrode? 1. 1/0 2. #2 3. #4 4. #5
Answer 2 REF1 T. 250.66
16) What's the smallest depth for a direct burial cable operating at 600 volts or less in all un-specified locations? 1. 18 inches 2. 24 inches 3. 30 inches 4. 42 inches
Answer 2 REF1 T. 300.5
77) A 10-hp, 3-phase squirrel cage motor will draw how many amperes at 208 volts? 1. 28.0 2. 30.8 3. 32.2 4. 33.4
Answer 2 REF1 T. 430.250
34) A 600 volt, 20 amp transformer will have an individual overcurrent device on the primary side rated at a largest of how many amps? No overcurrent protection is utilized on the secondary side of the transformer. 1. 20 amps 2. 25 amps 3. 30 amps 4. 35 amps
Answer 2 REF1 T. 450.3(B)
99) A 3-phase, 480-volt delta system is balanced with a 30-kVA load per phase. What is the line current, given an actual 80,000-VA total load? 1. 62.50 amperes 2. 96.22 amperes 3. 108.25 amperes 4. 166.66 amperes
Answer 2 REF1 UGLY'S REF2 I = 80000VA / (1.732*480) = 96.22
50) A single phase, 1.5 horsepower motor nameplate voltage is 120 volts single phase at 90% efficiency rating assume a power factor of 85%. What's the full load current rating for this motor? 1. 10.7 amps 2. 12.2 amps 3. 13.8 amps 4. 14.7 amps
Answer 2 REF1 UGLY'S REF2 I = (746*HP) / (E * eff * Pf)
89) Transformer vaults REQUIRE a sill or curb surrounding the vault that is the smallest height of 1. 2 in. 2. 3 in. 3. 4 in. 4. 5 in.
Answer 3 REF1 450.43(B)
12) The ampacity of a 15-foot feeder tap wire that supplies a panel board must be a minimum of 1. ⅛ the ampacity of the feeder 2. ¼ the ampacity of the feeder 3. ⅓ the ampacity of the feeder 4. ½ the ampacity of the feeder
Answer 3 REF1 240.21(B)(2)
38) What's the smallest length of a rod or pipe electrode? 1. 5 feet 2. 6 feet 3. 8 feet 4. 10 feet
Answer 3 REF1 250.53(G)
23) Metal conduits entering service equipment enclosure with concentric or eccentric knock outs containing service wires will have 1. Double lock nuts 2. Single lock nuts 3. Bonding bushings and jumpers 4. Lock nut and bushing
Answer 3 REF1 250.92(B)(1)-(4)
40) What are the REQUIRED number of surge arresters for a 4 wire wye-connected grounded system for a industrial plant where thunderstorms are frequent? 1. 1 2. 2 3. 3 4. 4
Answer 3 REF1 280.3
98) Given the scenario: Four 8 AWG ungrounded wires, two 8 AWG grounding wires, and one clamp inside the box. The smallest size device box the NEC allowed is ________ cu. In. 1. 12 2. 15 3. 18 4. 21
Answer 3 REF1 314.16(A)(1),(2),(5)
91) A 4-inch rigid metal conduit that is to enclose type THW wires, will have a bending radius of NOT below how many in? 1. 12 2. 18 3. 24 4. 30
Answer 3 REF1 344.24
74) Branch circuit wires are to be run through an end-to-end assembly of fluorescent fixtures. The wires will be closer than 3 in. to the ballast. What's the LOWEST temperature rating allowed for the branch circuit wire insulation? 1. 60 degrees C 2. 75 degrees C 3. 90 degrees C 4. 125 degrees C
Answer 3 REF1 410.68
63) A thermostatically controlled switching device is to serve the disconnecting means for fixed electric space heating equipment. The switch MUST meet what condition t be utilized for this purpose? 1. It must directly close all underground wires placed in the off position. 2. It must operate remote control circuits 3. It must have a marked "off" position 4. It must automatically energize the system after the device has been manually placed in the "off" position
Answer 3 REF1 424.20(A)(1)
7) An underwater junction box for a 12-volt lighting system for a swimming pool is connected with a PVC conduit, it is a flush deck box to meet the NEC it MUST 1. Have a screw cover 2. Have extra hubs 3. Be filled with potting compound 4. Be gasketed
Answer 3 REF1 680.24(A)(2)(c)(1)
88) What's the smallest separation between non-power limited and power limited wire? 1. 6 in. 2. 4 in. 3. 2 in. 4. 1 in.
Answer 3 REF1 760.136(G)
80) Where are tags placed to identify that equipment is being worked on and must NOT be operated? 1. The point where the main source of energy is connected. 2. All places where the equipment touches the ground 3. All points where the equipment can be energized 4. The place where the equipment is being worked on
Answer 3 REF1 GENERAL KNOWLEDGE
33) What's the ampacity of three 1 AWG THW copper wires in a raceway at an ambient temperature of 86 degrees F? 1. 100 amperes 2. 115 amperes 3. 130 amperes 4. 150 amperes
Answer 3 REF1 T 310.15(B)(16) THEN T. 310.15(B)(2)(a)
57) An industrial (loft) assembly area is 100' x 300'. What's the general lighting load? 1. 30,000 VA 2. 45,000 VA 3. 60,000 VA 4. 90,000 VA
Answer 3 REF1 T. 220.12
32) A non metallic sheathed cable of 60 degree rated wires feeds a panel that needs grounding. It is futillized at 60 amperes. What size copper equipment grounding wire is REQUIRED? 1. #6 2. #8 3. #10 4. #12
Answer 3 REF1 T. 250.122
35) A main distribution panel supplies power to a sub panel that has a 500 amp overcurrent protective device as its disconnecting means. What's the smallest size copper grounding wire for this subpanel? 1. #6 2. #4 3. #2 4. #1
Answer 3 REF1 T. 250.122
54) What's the largest allowable fill area for a 9-inch-wide cable tray where all cables are smaller than 4/0 AWG? 1. 7.0 square in. 2. 8.0 square in. 3. 10.5 square in. 4. 14.0 square in.
Answer 3 REF1 T. 392.22(A)
45) According to the NEC, what's the necessary number of running overload relays on a 3-phase motor that is not protected by another approved means? 1. None 2. 2 3. 3 4. 4
Answer 3 REF1 T. 430.37
79) What's the smallest head room for service equipment that is 5 ft. in height and its operating at 600 volts or less? 1. 4 ft 2. 4 ½ ft 3. 5 ft 4. 6 ½ ft
Answer 4 REF1 110.26(A)(3)
70) The voltage rating of electrical equipment utilized on a circuit to which it is connected will NOT be below 1. 120/240 volts 2. 240/480 volts 3. 600 volts 4. The nominal voltage of the circuit
Answer 4 REF1 110.4
55) A branch circuit that provides a 15-amp, 125-volt circuit to a residential bedroom will be protected by 1. A 15-amp circuit breaker 2. A 20-amp circuit breaker 3. GFCI protection 4. Arc fault protection
Answer 4 REF1 210.12
62) Lighting receptacles for indoor residential unit stairways MUST be controlled by a wall switch at each floor level where the difference between floor levels is 1. Two or more steps 2. Three or more steps 3. Four or more steps 4. Six or more steps
Answer 4 REF1 210.70(A)(2)
83) Double lock nuts MUST be utilized on rigid metal conduits when voltages exceed how many volts to ground? 1. 120 2. 150 3. 240 4. 250
Answer 4 REF1 250.97 EX. 2
1) Wiring located within the cavity of a fire-rated ceiling assembly, but NOT considered part of the fire-related assembly, is allowed to be 1. Secured to the ceiling assembly 2. Supported by the ceiling assembly 3. Secured to the support wires of the ceiling assembly 4. Supported by independent support wires
Answer 4 REF1 300.11(A)(1)
25) A 2 inch conduit enters the east side of a pull box and exits on the west side of the same box. The smallest space from the east wall to the west wall of the pull box is how many inches 1. 6 inches 2. 8 inches 3. 12 inches 4. 16 inches
Answer 4 REF1 314.28(A)(1)
67) For enclosures of wires of over 600 volts a metal underground box cover MUST weigh a smallest of how many pounds to meet the needments that all enclosures be lock 1. 35 pounds 2. 50 pounds 3. 60 pounds 4. 100 pounds
Answer 4 REF1 314.30(D)
94) Where can flat cable assemblies be utilized? 1. Feeder circuits 2. Receptacle circuits 3. Switching circuits 4. Branch circuits
Answer 4 REF1 322.10(I)
49) Cable splices made in a cable trays will be 1. Within sight 2. Butt tight 3. Copper 4. Accessible
Answer 4 REF1 392.56
20) Surface-mounted fixtures which contain ballast are to be mounted on a low density cellulose fiber board ceiling. They MUST be a minimum of how far from the surface of the fiber board 1. ½ inch 2. 1 inch 3. 1 ¼ inch 4. 1 ½ inch
Answer 4 REF1 410.136(B)
21) What's the largest allowed branch circuit overcurrent protection for a 240 volt, 4500 watt, 50 gallon water heater 1. 15 amps 2. 18 amps 3. 20 amps 4. 25 amps
Answer 4 REF1 422.13 THEN 240.6 REF2 4500VA/240V=18.75A * 125%(continuous load)= 23.75A thus 25A per 240.6 standard size OCP
78) What's the largest length flexible cord that can be utilized to connect an electrically-operated kitchen waste disposal? 1. 18 in. 2. 24 in. 3. 30 in. 4. 36 in.
Answer 4 REF1 422.16(B)(1)(2)
29) When using threaded fittings, in a class 1 division 1 areas a minimum of how many threads must be engaged? 1. 2 2. 3 3. 4 4. 5
Answer 4 REF1 500.8(E)(1)
76) Portable lamp holders utilized in a Class 1 commercial garage will NOT have plugs or 1. A hook 2. Insulation 3. A handle 4. A switch
Answer 4 REF1 511.4(B)(2)
87) An open fluorescent lighting fixture in a Class 1 commercial garage is set up over lanes through which vehicles are commonly driven. The fixture MUST BE AT LEAST how far above the floor? 1. 7 ft 2. 8 ft 3. 10 ft 4. 12 ft
Answer 4 REF1 511.7(B)(1)(b)
82) An underground service sub-feed to an outbuilding runs parallel to a pool. The smallest horizontal space from a pool is 1. 2 ft 2. 3 ft 3. 4 ft 4. 5 ft
Answer 4 REF1 680.1
9) A pool has an underwater speaker system. The PVC conduit runs to the forming shells must have an insulated copper wire sized at 1. #14 2. #12 3. #10 4. #8
Answer 4 REF1 680.27(A)(2)
37) Power limited wire MUST be what smallest height above the floor? 1. 12 feet 2. 10 feet 3. 8 feet 4. 7 feet
Answer 4 REF1 760.130(B)(1)
53) Mandatory rules of the NEC are characterized by the use of the terms 1. "Will" or "Will not" 2. "Can" or "cannot" 3. "May" or "may not" 4. "Shall" or "shall not"
Answer 4 REF1 90.5
17) A single family residential has a net calculation load of 22,800 VA. Voltage is 240 volts, single phase. The feeder load is 1. 50 amps 2. 75 amps 3. 80 amps 4. 95 amps
Answer 4 REF1 General Knowledge REF2 220.4
