Residential Electrician Exam #2

In walls or ceilings with a surface of concrete, tile, gypsum, plaster, or other noncombustible material, boxes employing a flush-type cover or faceplate shall be installed so that the front edge of the box will not set back of the finished surface more than _____. a) 1/4 inch b) 1/2 inch c) 3/8 inch d) 3/4 inch

A: 1/4 inch Ref: 314.20

Underwater luminaires installed in swimming pools are required to have GFCI protection if they operate at a voltage greater than _____. a) 15 volts b) 50 volts c) 120 volts d) 150 volts

A: 15 volts Ref: 680.23(A)(3)

When calculating the demand load for a one-family dwelling, what total MINIMUM volt-amperes (VA) must be included in the calculation for the small-appliance and laundry circuit loads? a) 4,500 VA b) 3,000 VA c) 1,500 VA d) 6,000 VA

A: 4,500 VA Ref: 210.11(C)(1) and (2); 220.52(A) and (B)

A GFCI protected receptacle outlet that provides power to a permanently installed swimming pool recirculating pump motor, shall be permitted not closer than _____ feet from the inside wall of the pool. a) 6 b) 5 c) 12 d) 15

A: 6 Ref: 680.22(A)(1)

The NEC mandates the ampacity of UF cable shall be that of _____ conductors. a) 60 degrees C rated b) 75 degrees C rated c) 86 degrees F rated d) 90 degrees C rated

A: 60 degrees C rated Ref: 340.80

The front edge of a switch box installed in a wall constructed of wood, shall be _____ from the surface of the wall. a) flush with or projected out b) set back a maximum of 1⁄4 inch c) set back a maximum of 1⁄2 inch d) set back a maximum of 3⁄8 inch

A: flush with or projected out Ref: 314.20

The MAXIMUM number of grounded conductors allowed to be terminated in an individual terminal, if conductors are not paralled, in the neutral bus of a panelboard is _____. a) one b) two c) three d) four

A: one Ref: 110.14(A)

For dwelling units, a branch-circuit supplying _____ receptacle outlets is permitted to also supply receptacle outlets in an attached garage. a) outdoor b) bathroom c) laundry room d) kitchen small-appliance

A: outdoor Ref: 210.52(B)(2); 210.11(C)(2) and (3)

Disregarding exceptions, when installing electrical metallic tubing (EMT), the run of tubing is required to be securely fastened at LEAST every _____. a) 6 feet b) 10 feet c) 15 feet d) 20 feet

B: 10 feet Ref: 358.30(A)

Any one cord-and-plug-connected utilization equipment connected to a 120-volt, 20-ampere rated branch-circuit shall have a MAXIMUM rating of _____. a) 10 amperes b) 16 amperes c) 20 amperes d) 25 amperes

B: 16 amperes Ref: 210.23(A)(1) Sol: 20 amperes x 80 percent = 16 amperes

Where a mobile home has the main service disconnecting means installed outdoors, the disconnecting means shall be installed, so the bottom of the enclosure is NOT less than _____ above finished grade. a) 1 foot b) 2 feet c) 3 feet d) 4 feet

B: 2 feet Ref: 550.32(F)

Given: the ungrounded service-entrance conductors for a one family residence are size 3/0 AWG THWN copper conductors. A copper grounding electrode conductor attached to the concrete encased steel reinforcing bars used as the grounding electrode shall not be smaller than size _____. a) 2 AWG b) 4 AWG c) 6 AWG d) 8 AWG

B: 4 AWG Ref: Tbl. 250.66

For dwelling units, where 125 volt, single-phase, 15 and 20 ampere receptacle outlets are installed within at LEAST _____ of the outside edge of a sink in a laundry room, GFCI protection must be provided. a) 4 feet b) 6 feet c) 8 feet d) 10 feet

B: 6 feet Ref: 210.8(A)(7)

When applying the general method of calculation for a dwelling unit, what is the feeder and service demand load, in kW, for one 8 KW rated residential electric range? a) 8.0 kW b) 6.4 kW c) 7.0 kW d) 12.0 kW

B: 6.4 kW Ref: Tbl. 220.55, Col. B Sol: 8 kW (connected load) x 80 percent = 6.4 kW demand load

A 120-volt receptacle is installed on a dwelling unit kitchen island countertop that is 8 feet from the kitchen sink. Which one of the following statements, if any, is correct? a) GFCI protection is not required because the receptacle is not within 6 feet of the sink. b) GFCI protection is required for all countertop kitchen receptacles. c) GFCI protection is not required on receptacles installed on kitchen islands. d) None of the above is correct.

B: GFCI protection is required for all countertop kitchen receptacles. Ref: 210.8(A)(6)

When doing box fill calculations, a fixture stud in a ceiling mounted outlet box is an equivalent to _____ conductor(s). a) zero b) one c) two d) three

B: one Ref: 314.16(B)(3)

A metal underground water pipe may serve as a grounding electrode if it is in direct contact with the earth for at LEAST _____ feet or more. a) 6 b) 8 c) 10 d) 12

C: 10 Ref: 250.52(A)(1)

For a one-family dwelling, the service disconnecting means shall have a rating of not less than _____ amperes when supplied with a 120/240-volt, single-phase service drop. a) 30 b) 60 c) 100 d) 200

C: 100 Ref: 230.79(C)

Service equipment for a mobile home shall be rated not less than _____ at 120/240 volts, single-phase. a) 50 amperes b) 60 amperes c) 100 amperes d) 150 amperes

C: 100 amperes Ref: 550.32(C)

The MAXIMUM height that kitchen countertop receptacle outlets may be installed above the countertop shall be _____. a) 12 inches b) 18 inches c) 20 inches d) 24 inches

C: 20 inches Ref: 210.52(C)(5)

A branch-circuit supplying more than one electric baseboard heater in a residential occupancy shall be rated a MAXIMUM of _____. a) 15 amperes b) 20 amperes c) 30 amperes d) 50 amperes

C: 30 amperes Ref: 424.3(A)

What is the MAXIMUM period allowed for temporary outdoor Christmas decoration lighting for residences? a) 30 days b) 60 days c) 90 days d) 4 months

C: 90 days Ref: 590.3(B)

Flexible cord is considered as protected by a 20 ampere branch circuit breaker if it is _____ and approved for use with a specific listed appliance. a) not less than 6 feet in length b) size 20 AWG or larger c) size 18 AWG or larger d) size 16 AWG or larger

C: size 18 AWG or larger Ref: 240.5(B)(2)

For dwelling units, panelboards are permitted to be located in all the areas listed EXCEPT _____. a) hallways b) garages c) kitchens d) bathrooms

D: bathrooms Ref: 240.24(E)

The grounding contacts of branch-circuit receptacle outlets shall be grounded by connection to the _____ conductor. a) bonding b) neutral c) grounded d) equipment grounding

D: equipment grounding Ref: 406.3(C)