Module 11 - Residential Electrical Services Exam Questions and Answers 100% Accurate
A small residence has a floor area of 900 square feet. What is its general lighting load? - ANSWER-2,700VA
Per NEC Table 220.54, a household with two dryers has a demand factor of __________. - ANSWER-100%
If a dwelling has two kitchen areas, then the total small appliance branch circuits required would be __________. - ANSWER-four at 1,500VA each
A lighting load of 2,700VA at 120V has an amperage of __________. - ANSWER-22.5A
When used as a grounding electrode, a ground ring must be at least __________. - ANSWER-20' (6.0 m) long
When a screw is used as a main bonding jumper, it must be colored __________. - ANSWER-green
Information on equipment grounding for computers is found in __________. - ANSWER-NEC Section 250.114
Per NEC Section 230.24(B), if the service conductors pass over residential property and
driveways or commercial property that is not subject to truck traffic, the conductors must
be at least __________. - ANSWER-15' (4.5 m) above the ground
A residence has conductors installed under a 1" (25 mm) slab. According to NEC Section 230.6, these conductors are considered __________. - ANSWER-inside the house, and a disconnect is required at the meter base
In three-wire NM cable, the color code of the conductors is __________. - ANSWER-
black, white, and red, with a bare or green grounding conductor
Which of the following areas of a residence would most likely use conductors run in conduit? - ANSWER-unfinished basements A branch circuit that supplies a storage-type water heater with a capacity of 120 gallons (450 L) or less and a nameplate rating of 20A must be rated at a minimum of __________. - ANSWER-25A
A branch circuit for lighting has a capacity of 1,800VA. It should be loaded to no more than __________. - ANSWER-1,440VA
A metallic outlet box for two No. 12 AWG conductors with a ground wire, cable clamp, a switch, and a looped conductor over 12" (300 mm) would count as __________. - ANSWER-eight conductors
The brass screw on a receptacle connects to the __________. - ANSWER-ungrounded conductor
The correct operation of a four-way switch requires at least __________. - ANSWER-
two three-way switches
When installing a hot tub, at least one GFCI-protected receptacle must be located no more than __________. - ANSWER-10' (3.0 m) away from the inside wall of the hot tub
The minimum number of small appliance circuits required by the NEC in a kitchen area is _____. - ANSWER-2
When sizing electrical services, at which percentage is the first 3,000VA is rated at __________. - ANSWER-100%
According to NEC Section 220.53, a demand factor of 75% may be applied to __________. - ANSWER-fixed appliance loads
The minimum service disconnecting means for a one-family dwelling is __________. - ANSWER-100A
The general lighting load in a residence is 3,600VA at 120V. What is the amperage? - ANSWER-30A
A single-pole GFCI breaker is rated at __________. - ANSWER-120VAC
Exposed noncurrent-carrying metal parts of fixed equipment must be grounded if the equipment operates with any terminal over - ANSWER-150V to ground
Service drop conductors must be located at a minimum height of __________. - ANSWER-10' above the ground or other accessible surface
Which section of the NEC requires that fittings be identified for use with service masts? - ANSWER-NEC Section 230.28
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