IEC FINAL EXAM YEAR 1, 2, 3 AND 4 EXAMS |
ALL QUESTIONS AND CORRECT ANSWERS |
ALREADY GRADED A+ | LATEST VERSION |
VERIFIED ANSWERS
IEC FINAL EXAM YEAR 1
,For a 125-Amp, 120/240-V, 3W residential service, ___ AWG copper
THHN/THWN conductors are the smallest permitted for the ungrounded
conductors.
a.1
b.4
c.3
d.2
e.none of these ------CORRECT ANSWER---------------d. 2
NEC Table 310.12
Loads, such as heating and air conditioning, that do not operate at the
same time are said to be noncoincident loads. While separate circuits must
be designed to serve each load, when calculating service load only the ___
of two noncoincident loads needs to be included.
What is the result if the neutral wire becomes open on a multiwire circuit
having 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. ------CORRECT ANSWER---------------a.
The load of higher resistance would overheat and probably be damaged.
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?
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.
Voltmeters are connected in ___ with the load when used to measure
voltage across a load in a circuit. ------CORRECT ANSWER---------------
Parallel
, 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. ------
CORRECT ANSWER---------------Series
(3 wire parallel circuits turn to series when the neutral is disconnected from
the neutral bar)
What is the minimum number of receptacles required in an unfinished
basement?
What part of the NEC® is a reference for calculating conduit fill where all
conductors are the same size?
a.Article 100
b.Table 310.15(B)(16)
c.Annex C
d.Table 314.16(A) ------CORRECT ANSWER---------------c. Annex C
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