IEC YEAR 2 FINAL EXAM NEWEST
ACTUAL EXAM COMPLETE
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
For the purpose of determining the number of current-
carrying conductors in a cable or conduit, the neutral
_____ counted when the branch circuit is 120/240-volt, 1
phase, 3 wire connected to a 120/240-volt, 3 phase delta,
4 wire panelboard. Each of the two circuits carries 16
amps and serves resistive (linear) loads. Correct Answer
is not
Where a 120/240 volt, 1 phase, 3 wire multiwire branch
circuit is connected to a "split-wired" duplex receptacle in a
barber shop, the branch-circuit OCPD/disconnect is
permitted to be ______
i. two single-pole circuit breakers without handle ties
ii. two single-pole circuit breakers with identified handle
ties
iii. a 2-pole circuit breaker Correct Answer ii or iii only
Which of the following is a type of circuit condition?
i.short circuit
ii. overload Correct Answer i and ii
, A 20-amp multiwire branch circuit is connected to breakers
1 and 3 in a 120/208 volt 3 phase 4 wire panelboard.
_____ if the "hot" from breaker 3 and the neutral are
connected to a 2000-watt lighting fixture load. Correct
Answer The load will operate normally and the breaker will
not trip
When ____ touch together this is a short circuit.
-i. two ungrounded circuit conductors
- ii.an ungrounded and a grounded circuit conductor
- iii. an ungrounded circuit conductor and the metal
conduit. Correct Answer i or ii only
You are going to pull in three dedicated (individual) branch
circuits into one conduit. Each circuit supplies power to a
120-volt load. The ungrounded conductors will be
connected to breakers 2,4 and 6 in a 120/240 volt single
phase 3- wire panel board. Per the NEC, the fewest
number of neutral conductors you can install for the
branch circuit is _______. Correct Answer 2
In a run of conduit, when couplings and connectors are
loose this will ____ the amount of time required for a
circuit breaker to open when an overload occurs. Correct
Answer have no effect on
Your only available grounding electrode is the metal
underground water pipe from the water utility. You are
required by the NEC to have one other grounding
electrode for your service. Which of the following driven
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