Exam (elaborations)
IEC FINAL EXAM YEAR TEST
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IEC FINAL EXAM YEAR TEST
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IEC FINAL EXAM YEAR TESTFINATTTTTTTTTTTTTTTTTTTT
1. What is the result if the neutral wire becomes open on a multiwire circuit
v v v v v v v v v v v v v v
having unequal loads? v v
a.
The load of higher resistance would overheat and probably be damaged. b
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.
The load of lesser resistance would overheat and probably be damaged. c
v v v v v v v v v v v
.
No effect until one load is turned off or opens. d.
v v v v v v v v v v
No effect.: a.
v v
The load of higher resistance would overheat and probably be damaged.
v v v v v v v v v v
2. Circuits 7 and 9 share a neutral. This is a multiwire branch circuit. If Ckt. 7 is
v v v v v v v v v v v v v v v v
vdrawing 13 amps and Ckt. 9 is drawing 16 amps, how much current is flowing i
v v v v v v v v v v v v v v v
n the neutral?
v v
a.3 v
b.13
c.2
v
9
d.16: 3 Amps v v
3. The Code reference that specifies the type of disconnectin v v v v v v v v
g means (circuit breaker for example) that can be used on a multiwire branch ci
v v v v v v v v v v v v v v
rcuit that feeds devices mounted on the same yoke [a stack switch or a duplex
v v v v v v v v v v v v v v v
receptacle for example] is .Note: Select N/
v v v v v
A (not applicable) if there is not an NEC requirement.
v v v v v v v v v
a.Article 100 b v v
.240.15(B)
(1) c.404.8(A)
v
1v/v16
, IEC FINAL EXAM YEAR TEST
d.N/A: b. 240.15(B)(1)
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v v
4.Voltmeters are connected in with the load when used to measure voltage acr
v v v v v v v v v v v v
oss a load in a circuit.: Parallel
v v v v v v
5. The neutral has been removed from the neutral bar in the circuit shown in Fi
v v v v v v v v v v v v v v
gure 128.407. Lamp 3 is connected in with Lamps 1 and 2.: Series
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(3 wire parallel circuits turn to series when the neutral is disconnected f
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rom the neutral bar)
v v v
6. What is the minimum number of receptacles required in an unfinished
v v v v v v v v v v
basement?
v
a.2
2v/v16
, IEC FINAL EXAM YEAR TEST
b.4 FINATTTTTTTTTTTTTTTTTTTT
c.1
d.0: c. 1 v v
7. The overall diameter (including insulation) of a 250 kcmil v v v v v v v v v
THHN/THWN cop- per conductor is inches? v v v v
a..082
b..397
c..765
d..711 e..575 v
: d. 711
v v
NEC Chapter 9 Table 5 pg 701
v v v v v v
8. What part of the NEC is a reference for calculating conduit fill where all
v v v v v v v v v v v v v v
conductors are the same size? v v v v
a.Article 100 v
b.Table 310.15(B)(16) v
c.Annex C v
d.Table 314.16(A): c. Annex C v v v v
9. What is the minimum trade size Schedule 80 PVC required to contain four
v v v v v v v v v v v v v
8 AWG THHN/THWN copper conductors?
v v v v
a.1 b. v
3/4 c. v
11/4 d v
.11/2
e.none of these: b. 3/4 v v v v
NEC Annex C v v
10. Eleven #12, f v v
ive #10, and six #6 THHN/
v v v v v
THWN conductors will be installed in a run of EMT. The smallest trade size EM
v v v v v v v v v v v v v v
T you can use is
v v v v .
a.11/2
vb.21/
2 c.11 v
/4 d.2 v
3v/v16
, IEC FINAL EXAM YEAR TEST
e.1: c. 11/4
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v v
4v/v16
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