RESIDENTIAL ELECTRICIAN CERTIFICATION EXAM 1-6 | QUESTIONS AND ANSWERS | VERIFIED ANSWERS GRADED A+ | LATEST EXAM UPDATE

RESIDENTIAL ELECTRICIAN CERTIFICATION EXAM 1-6 |
QUESTIONS AND ANSWERS | VERIFIED ANSWERS GRADED A+ |
LATEST EXAM UPDATE




EXAM 1
Ferrous metal enclosures for grounding electrode conductors shall be .
a) electrically continuous
b) electrically isolated
c) not permitted
d) rigid metal conduit (RMC) only - CORRECT ANSWER - A: electrically
continuous
Ref: 250.64(E)


Unless listed for the control of other loads, general use dimmer switches shall
only be used to control .
a) switched receptacles for cord-connected incandescent luminaires
b) permanently installed incandescent luminaires
c) ceiling fans with luminaires
d) holiday decorative lighting - CORRECT ANSWER - B: permanently
installed incandescent luminaires
Ref: 404.14(E)


All 125-volt, single-phase, 15- and 20-ampere receptacles installed in
residential garages shall be .
I) protected by a listed arc-fault interrupter
II) provided with ground-fault circuit-interrupter protection
a) I only

,b) II only
c) both I and II
d) neither I nor II - CORRECT ANSWER - B: II only
Ref: 210.8(A)(2); 210.12(B)


The MAXIMUM allowable ampacity of size 18 AWG fixture wire is
amperes.
a) 12
b) 10
c) 8
d) 6 - CORRECT ANSWER - D: 6
Ref: Tbl. 402.5


A receptacle outlet installed for a gas or electric clothes dryer in the laundry
room of a dwelling unit must be installed within at LEAST feet of the
intended location of the dryer.
a) 6
b) 4
c) 10
d) 3 - CORRECT ANSWER - A: 6
Ref: 210.50(C)


Which of the following listed conductors are required to have overcurrent
protection on a residential electric service?
a) grounding conductors
b) bonding conductors
c) identified conductors
d) ungrounded conductors - CORRECT ANSWER - D: ungrounded
conductors

,Ref: 290.9


Given: a 40-gallon electric water heater has a nameplate rating of 4,500 watts at
240 volts. What is the MAXIMUM standard size circuit breaker the NEC
permits to protect the water heater?
a) 20 amperes
b) 25 amperes
c) 30 amperes
d) 45 amperes - CORRECT ANSWER - C: 30 amperes
Ref: 422.11(E)(3); 240.6(A); Current Formula
Sol:
I = P/E
I = 4500 va / 240 volts
I = 18.75 amps x 150 percent
I = 28.1 amperes


If a cable or raceway enters an enclosure such as a meter base, above
uninsulated live parts in a wet location, the fittings used to connect the
enclosure must be for wet locations.
a) identified
b) marked
c) suitable
d) listed - CORRECT ANSWER - D: listed
Ref: 312.2(A)


In general, the power supply cord to a mobile home shall have a MAXIMUM
rating of .
a) 50 amperes
b) 60 amperes

, c) 100 amperes
d) 125 amperes - CORRECT ANSWER - A: 50 amperes
Ref: 550.10(A)


A 150 kVA, single-phase transformer having a secondary voltage of 120/240 is
to be installed at a multi-family dwelling. The current available at the secondary
is amperes.
a) 329
b) 421
c) 625
d) 729 - CORRECT ANSWER - C: 625
Sol:
I = P/E
I = 150,000 va / 240 volts
I = 625 amperes


When the heating, air-conditioning, or refrigeration equipment is installed on
the roof of an apartment complex, a 125-volt, 15- or 20-ampere rated receptacle
outlet .
a) is not required by the NEC
b) may be connected to the line side of the equipment disconnecting means, if
the outlet is GFCI protected
c) shall be located on the same level and within 25 feet of the heating, air-
conditioning, or refrigeration equipment
d) shall be installed on the roof where the equipment is located and not more
than 75 feet from each unit - CORRECT ANSWER - C: shall be located on the
same level and within 25 feet of the heating, air-conditioning, or refrigeration
equipment
Ref: 210.63