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Electrician
Electrician Set-2
Transmission and Distribution
11

Circuit Breakers and Relays MCQ with Answers

11) What is the defect in an air circuit breaker, if trips intermittently on loading?

Incorrect setting of relay

Excessive heat

Insufficient air pressure

Line voltage is too high

Answer is:

Incorrect setting of relay

Circuit Breakers and Relays MCQ with Answers

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Related Circuit Breakers and Relays MCQ with Answers

12) What is the defect in a oil circuit breaker if the oil heats up excessively

Line voltage is too high

Excessive load

Poor dielectric strength

Defective tripping mechanism

Answer is:

Poor dielectric strength

13) What is the cause for the defect if phase to ground fault on the transmission line?

Components failure

Insulation failure

Human error

Fuse failure

Answer is:

Insulation failure

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