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Electrician Set-1
Circuit Breakers
10

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

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

Air blast

Minimum oil

Bulk oil

Sulphur hexafluoride

Answer is:

Sulphur hexafluoride

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

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

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

to produce insulation effect

to stop the ionisation of the surrounding air

to ensure the operation of the device at a low temperature

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

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.

magnetic

thermal

magnetic and thermal

low voltage

Answer is:

magnetic

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

oil circuit breaker (OCB)

miniature circuit breaker (MCB)

air circuit breaker (ACB)

air blast circuit breaker (ABCB)

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

Magnetic and thermal release

Thermal release

Magnetic release

Low voltage release

Answer is:

Thermal release

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

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