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Electrician
Electrician Set-1
Circuit Breakers
14

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

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

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

frequent tripping of ELCB

electric shock

fire hazard

excessive billing of energy

Answer is:

excessive billing of energy

16) Miniature circuit breaker (MCB) are used in domestic and commercial installations for control and protection. What is the range of current rating of single pole MCBs commercially available ?

2.0 to 6 amps.

0.5 to 60 amps.

1.0 to 62 amps.

6.0 to 32 amps.

Answer is:

0.5 to 60 amps.

Miniature circuit breaker (MCB) are used in domestic and commercial installations for control and protection. What is the range of current rating of single pole MCBs commercially available ?

17) Miniature circuit breaker (MCB) are used in domestic and commercial installations for control and protection. The current rating of double pole and triple pole MCB is

2.0 to 6 amperes

0.5 to 60 amperes

5.0 to 60 amperes

6.0 to 100 amperes

Answer is:

5.0 to 60 amperes

Miniature circuit breaker (MCB) are used in domestic and commercial installations for control and protection. The current rating of double pole and triple pole MCB is

18) Current rating of MCB selected for an air conditioner of 1 ton is

10/15 amperes

15/20 amperes

10/20 amperes

15/30 amperes

Answer is:

10/15 amperes

Current rating of MCB selected for an air conditioner of 1 ton is

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

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