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IEC year 1 final exam Questions and Answers 2024
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IEC year 1 final exam
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IEC year 1 final examWhat is the result if the neutral wire becomes open on a multiwire circuit having unequal
loads?
Select one:
a.
The load of higher resistance would overheat and probably be damaged.
b.
The load of lesser resistance would overheat and probably be damaged.
c.
No effect until one load is turned off or opens.
d.
No effect. - answerThe load of higher resistance would overheat and probably be
damaged.
Refer to Figure 128.202. ___ volts are applied across the water heater element.
Select one:
a.
120
b.
240
c.
0
d.
480 - answer240
Circuits 7 and 9 share a neutral. This is a multiwire branch circuit. If Ckt. 7 is drawing 13
amps and Ckt. 9 is drawing 16 amps, how much current is flowing in the neutral?
Select one:
a.
3
,b.
13
c.
29
d.
16 - answer3
The Code reference that specifies the type of disconnecting means (circuit breaker for
example) that can be used on a multiwire branch circuit that feeds devices mounted on
the same yoke [a stack switch or a duplex receptacle for example] is ___.
Note: Select N/A (not applicable) if there is not an NEC® requirement.
Select one:
a.
Article 100
b.
240.15(B)(1)
c.
404.8(A)
d.
N/A - answer240.15(B)(1)
Voltmeters are connected in ___ with the load when used to measure voltage across a
load in a circuit.
Select one:
a.
parallel
b.
series - answerParallel
The neutral has been broken in the circuit shown in Figure 128.418. The current through
Lamp F (IF) with the neutral opened is ___ amps.
Select one:
a.
6
, b.
1
c.
2
d.
8
e.
3 - answer1
Refer to Figure 128.523. Each battery puts out 12 volts. The voltage applied to the load
is ___ volts.
Select one:
a.
48
b.
0
c.
24
d.
36
e.
12 - answer24
What is the minimum number of receptacles required in an unfinished basement?
Select one:
a.
2
b.
4
c.
1
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