IEC YEAR 2 MID-TERM EXAM ACTUAL
EXAM COMPLETE 150 QUESTIONS AND
DETAILED CORRECT ANSWERS
(VERIFIED ANSWERS) | A+ GRADE 2024-
2025
Which of these wiring methods is NOT permitted to be
used for service-entrance conductors?
-A. RMC
-B. LFNC
-C.AC cable
_D.ENT Correct Answer AC cable
A service lateral is to be installed as direct-buried cable in
the bottom of a trench that is 42 inches below finish grade.
The trench is to be filled with dirt only. A warning ribbon is
required to be installed in the trench at a maximum depth
of ______ inches below finish grade. Correct Answer 30
Which of the following services requires that a GFPE
device be installed ?
-1. 480/277,3 Phase, 4-wire 1200 A safety seitch with 800-
A fuses.
-2. 277/480 volt, 3 phase, 4-wire switchgear with a 1000-
amp main breaker..
-3. 120/240 volt, 3 Phase, 4-wire 1200 Amp switchboard
Correct Answer 1 and 2 only
,On the BCES drawings E1.1 where ther is concealed
electrical equipment, you are required to _____. Correct
Answer provide an access door
The conduit(s) installed between the BCES' MSB and the
utility transformer is (are) trade size ______. Correct
Answer 4
______ kcmil grounded feeder conductors are installed in
the conduits that are installed between the BCES building
and the utility transformers. Correct Answer 500
For BCES, the minimum size galvanized threaded rod that
can be used to support suspended transformers is _____ -
inch Correct Answer 1/2
In a class 2 location, ventilating pipes for generators shall
be of metal not less than _______ inches in thickness or
of equally substantial noncombustible material. Correct
Answer .021 in
In a class 2, division 1 location where a raceway provides
communication between an enclosure that is required to
be dust-ignition proof and one that is not, a vertical
raceway not less than _______ feet long and extending
downward from the dust-ignition proof enclosure is a
suitable means to prevent the entrance of dust. Correct
Answer 5 ft
, A bare conductor can be used for a grounding electrode
conductor whre it is installed between a service panel and
a ground rod. T/F Correct Answer True
A bare _____ can be used as an equipment grounding
conductor.
- Busbar
-wire Correct Answer either 1 or 2
Which of the following are characteristics of THHN/THWN
insulation?
-A.- it is heat resistant
-B.- It can be installed in wet,damp, or dry locations.
-C- It is flame-retardant
-D.-It is moisture resistant Correct Answer A through D
Which 2 awg conductor has a higher resistance?
-Aluminum
-Copper Correct Answer Aluminum
What minimum size conductors are required to feed a 12.5
KW, 240-volt electric furnace operated at 240 volts? Size
the conductors per 424.3(B). The branch-circuit OCPD is a
circuit breaker that is rated for 75 degrees. Correct Answer
6
The minimum size THWN/THHN aluminum conductor
permitted to serve a 95 amp load that will operate
continuously is _____ awg. Correct Answer 1/0
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