Which portion of the power system is least prone to faults?

A. Alternator.
B. Transformer.
C. Overhead lines.
D. Underground cable.

Answer 
C. Overhead lines.

Explanation 
  • The Overhead lines have more prone to fault than other equipment and it is 50 %  
  • The Alternator has least  prone to fault 
  • Majorly alternator affected by the internal fault like overloading, reverse power, Negative phase sequence
  • The alternator is protected by the use of  "Merz prize differential relay ''


Power System MCQs With Explanation 

 


Transformer MCQs With Explanation 






Synchronous Motor MCQs With Explanation 



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