Journeyman Electrician Practice Test 35

Question 1: What is the maximum overall length of the power supply cord for mobile homes?

• 36 1/2 feet
• 21 feet
• 28 1/2 feet
• 20 feet

NEC Reference: NEC 550.10(D)

Question 2: For circuits and equipment operating at less than 50 volts, the receptacle rating shall be not less than ……………..

• 15 amperes
• 10 amperes
• 20 amperes
• 5 amperes

NEC Reference: NEC 720.6

Question 3: Which of the following position the circuit breaker enclosures must be mounted?

• vertical
• horizontal

NEC Reference: NEC 240.33

Question 4: What is the minimum receptacle outlet rating for lighting other than general illumination?

• 180 VA
• 320 VA
• 120 VA
• 240 VA

Question 5: What is the corrected ampacity of a 1/0 THWN conductor in wet location, if the ambient temperature of location is 40⁰ C?

• 123 Amperes
• 132 Amperes
• 150 Amperes
• 141 Amperes

NEC Reference: NEC Table 310.16

Question 6: Under certain conditions equipment grounding conductors are considered as current carrying conductors.

• True
• False

NEC Reference: NEC 310.15(B)(5)

Question 7: How many minimum number of branch circuits are required for dwelling unit laundry receptacle outlet?

• one 20 ampere branch circuit
• one 15 ampere branch circuit
• Two 20 ampere branch circuits
• Two 15 ampere branch circuits

NEC Reference: NEC 210.52(G)

Question 8: Per NEC 701.12, a legally required standby system used to supply power to legally required loads (such as heating systems, communications, ventilation, and sewage disposal) must restore power within _____ after normal service fails.

• 30
• 60
• 75
• 45

NEC Reference: NEC 701.12

Question 9: Which of the following is the smallest size wire permitted for a feeder circuit?

• No 10 AWG
• No 8 AWG
• No 12 AWG
• No 14 AWG

Question 10: What is the unit load in volt ampere per square foot for a hotel?

• 3 VA
• 2 VA
• 1 VA
• 5 VA

NEC Reference: NEC 220.12

Question 11: Per NEC 314.28(A)(1), for a straight pull through a pull box (where conduit enters and exits from the same wall), the minimum length of the box shall be at least _____ times the trade size of the largest conduit entering.

• 4 times
• 6 times
• 8 times
• 10 times

NEC Reference: NEC 314.28(A)(1)

Question 12: Per NEC 210.12(A), arc-fault circuit-interrupter (AFCI) protection is required for all 120-volt, 15- and 20-ampere branch circuits supplying outlets in _____ of a dwelling unit.

• Kitchens and bathrooms only
• Bedrooms, living rooms, kitchens, hallways, and similar dwelling areas
• Garages and unfinished basements
• Only bedrooms

NEC Reference: NEC 210.12(A)

Question 13: Per NEC 240.4(D), the maximum overcurrent protection device (OCPD) rating for a branch circuit wired with No. 14 AWG copper conductors (THWN) is _____ .

• 20 amperes
• 15 amperes
• 25 amperes
• 30 amperes

NEC Reference: NEC 240.4(D)

Question 14: Per NEC 110.26(A)(2), the minimum width of working space in front of electrical equipment shall be _____ , or the width of the equipment, whichever is greater.

• 18 inches
• 24 inches
• 30 inches
• 36 inches

NEC Reference: NEC 110.26(A)(2)

Question 15: In a purely capacitive AC circuit, what is the phase relationship between current and voltage?

• Voltage leads current by 90°
• Current leads voltage by 90°
• Current and voltage are in phase
• Current lags voltage by 90°

Question 16: Per NEC 300.3(B), all conductors of the same circuit shall be contained within the same _____ .

• Different conduits to reduce heat buildup
• Cable, raceway, trench, or cord
• At least two separate cables for safety
• The same panel or load center

NEC Reference: NEC 300.3(B)

Question 17: Per NEC 250.50, when more than one grounding electrode is present at a building or structure, all grounding electrodes must be _____ .

• Left separate to provide independent fault paths
• Bonded together as part of the grounding electrode system
• Connected only to the water pipe electrode
• Installed at least 10 feet apart from each other

NEC Reference: NEC 250.50

Question 18: Per NEC 300.15(A), a box or conduit body shall be installed at each point in a wiring system where _____ .

• The conduit changes direction by 45° or more
• Conductors are spliced, connected to a device, or require access
• The conduit run exceeds 50 feet
• More than 3 current-carrying conductors are present

NEC Reference: NEC 300.15(A)

Question 19: Per NEC 404.7, for snap switches in a vertical position (toggle switches mounted on a standard outlet box), the switch handle should be in the _____ position when the circuit is energized (ON).

• Down
• Up
• Horizontal (left)
• Either position is acceptable

NEC Reference: NEC 404.7

Question 20: Per NEC 210.11(C)(3), at least one 20-ampere branch circuit shall be provided for the bathroom(s) of a dwelling unit. This circuit shall supply ONLY _____ .

• Bathroom receptacles and lighting outlets
• Only bathroom receptacle outlets (no other outlets permitted)
• Bathroom outlets and one bedroom receptacle
• Any outlets in the bathroom and adjacent hallway

NEC Reference: NEC 210.11(C)(3)

Question 21: A transformer has 100 turns on the primary winding and 400 turns on the secondary winding. If 120 volts is applied to the primary, what is the secondary output voltage and what type of transformer is this?

• 30 volts; a step-down transformer
• 480 volts; a step-up transformer
• 480 volts; a step-down transformer
• 240 volts; an isolation transformer

Question 22: Per NEC 334.10(A), Type NM cable (non-metallic sheathed cable, "Romex") shall be permitted for use in which of the following locations?

• Embedded in concrete slabs
• Dry locations inside one- and two-family dwellings
• Exposed runs in commercial garages
• Direct burial underground

NEC Reference: NEC 334.10(A)

Question 23: Per NEC 430.6(A)(1), when sizing motor branch circuit conductors and overcurrent protective devices, the full-load current (FLC) value to use shall come from _____ .

• The motor nameplate full-load amperes (FLA)
• NEC Tables 430.247, 430.248, 430.249, or 430.250
• The motor nameplate locked-rotor current
• The utility bill average current readings

NEC Reference: NEC 430.6(A)(1)

Question 24: Per NEC 422.16(B)(2), a listed household range hood may be connected by a cord and plug if the receptacle is accessible and the cord is _____ feet or less in length.

• 18 inches (1.5 feet)
• 36 inches (3 feet)
• 48 inches (4 feet)
• 72 inches (6 feet)

NEC Reference: NEC 422.16(B)(2)

Question 25: Per NEC 680.26(B), all metallic parts of a permanently installed swimming pool — including the pool structure, water, and metallic equipment and fittings — must be bonded together using a solid copper conductor not smaller than _____ AWG.

• No. 12 AWG
• No. 10 AWG
• No. 8 AWG
• No. 6 AWG

NEC Reference: NEC 680.26(B)

Question 26: Per NEC Table 220.12, when calculating general lighting load for a dwelling unit, the load is based on _____ volt-amperes per square foot of floor area.

• 1.5 VA per square foot
• 2 VA per square foot
• 3 VA per square foot
• 4 VA per square foot

NEC Reference: NEC 220.12

Question 27: Per NEC 250.119(A), an equipment grounding conductor (EGC) of No. 6 AWG or smaller shall be identified by which of the following methods?

• White or gray insulation
• Bare, green, or green with one or more yellow stripes
• Red insulation for hot legs only
• Black with a green stripe

NEC Reference: NEC 250.119(A)

Question 28: Per NEC 230.42(A)(1), the ampacity of service entrance conductors shall be not less than the _____ calculated in accordance with Part III or IV of Article 220.

• 125% of the largest connected load
• Load calculated in accordance with Part III or IV of Article 220
• 200% of the feeder load
• 100 amperes minimum for any residential service

NEC Reference: NEC 230.42(A)(1)

Question 29: Per NEC 450.9, dry-type transformers shall be installed so that the _____ required for cooling purposes is not blocked or obstructed.

• High-voltage primary winding
• Ventilation required for cooling
• Conduit knockout opening
• Grounding terminal

NEC Reference: NEC 450.9

Question 30: In a parallel circuit with multiple branches, which of the following is true?

• The same current flows through all branches
• The voltage across each branch equals the supply voltage
• Total resistance is greater than the largest branch resistance
• Adding more branches increases total resistance