IEC YEAR 1 FINAL EXAM STUDY 2024 WITH 100% CORRECT ANSWERS LATEST UPDATE
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Iec
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Iec
What 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...
IEC Final Exam Year 1.pdf file:///C:/Users/HP/Desktop/pppppp/IEC%20Final%20Exam%20Year
IEC Final Exam Year 1
1. What is the result if the neutral wire becomes open on a multiwire circuithaving
unequal loads?
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.
ANS a.
The load of higher resistance would overheat and probably be damaged.
2. Circuits 7 and 9 share a neutral.This is a multiwire branch circuit. If Ckt. 7 isdrawing 13
amps and Ckt. 9 is drawing 16 amps, how much current is flowingin the neutral?
a.3
b.13
c.29
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,IEC Final Exam Year 1.pdf file:///C:/Users/HP/Desktop/pppppp/IEC%20Final%20Exam%20Year
d.16
ANS 3 Amps
3. The Code reference that specifies the type of disconnecting means (circuitbreaker for
example) that can be used on a multiwire branch circuit that feedsdevices 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.
a.Article 100
b.240.15(B)(1)
c.404.8(A)
d.N/A
ANS b. 240.15(B)(1)
4. Voltmeters are connected in with the load when used to measure voltageacross a load in
a circuit.
ANS Parallel
5. The neutral has been removed from the neutral bar in the circuit shown in Figure
128.407. Lamp 3 is connected in with Lamps 1 and 2.
ANS Series
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(3 wire parallel circuits turn to series when the neutral is disconnected from theneutral
bar)
6. What is the minimum number of receptacles required in an unfinishedbasement?
a.2
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b.4
c.1
d.0
ANS c. 1
7. The overall diameter (including insulation) of a 250 kcmil THHN/THWN cop-per
conductor is inches?
a..082
b..397
c..765
d..711 e..575
ANS d. 711
NEC Chapter 9 Table 5 pg 701
8. What part of the NEC is a reference for calculating conduit fill where allconductors
are the same size?
a.Article 100
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