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

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

11) The main purpose of filling oil in a circuit breaker is :

Answer is:

to suppress the sparking produced across the connector at the time of breaking a circuit.

12) In circuit breakers the device used for tripping the line in the event of short-circuit is of _____ type.

Answer is:

magnetic

13) The circuit breaker which does not contain any serviceable part is known as :

Answer is:

miniature circuit breaker (MCB)

The circuit breaker which does not contain any serviceable part is known as :

14) Short circuit protection is provided in the circuit breaker by

Answer is:

Thermal release

15) In an installation, leakage current of smaller magnitudes causes

Answer is:

excessive billing of energy