IEC YEAR 1 FINAL EXAM QUESTIONS | TESTED AND TRIED ANSWERS | LATEST UPDATE 2024/2025 100% (GRADE A+)

IEC YEAR 1 FINAL EXAM QUESTIONS | TESTED
AND TRIED ANSWERS | LATEST UPDATE
2024/2025 100% (GRADE A+)
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 opens.


d.


No effect.


Ans>> The 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:




1

,a.


120


b.


240


c.


0


d.


480


Ans>> 240




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




2

,b.


13




c.


29




d.


16


Ans>> 3




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.


3

, Article 100




b.


240.15(B)(1)




c.


404.8(A)




d.


N/A


Ans>> 240.15(B)(1)




Voltmeters are connected in ___ with the load when used to measure voltage across a load in a

circuit.




Select one:




a.

4