Circuit Breakers MCQ - Electrician (Set-1) with Answers

Circuit Breakers MCQ - Electrician (Set-1) with Answers

6) Main purpose of oil in OCB is to

Answer is:

quenching arc

7) In a minimum oil circuit breaker, the oil is used

Answer is:

to act as circuit breaking medium only

8) What is the preferred type of "circuit breaker" to be installed in extra high voltage A.C. System ?

Answer is:

Sulphur hexafluoride circuit breaker

9) Which of the following circuit breakers has high reliability and negligible maintenance ?

Answer is:

Sulphur hexafluoride circuit breaker

10) Which of the following circuit breakers take minimum time in installation ?

Answer is:

Sulphur hexafluoride