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

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

21) Which device can be used as switch and as well as protective device ?

Answer is:

Miniature circuit breaker

22) ELCB stands for

Answer is:

Earth Leakage Circuit Breaker

23) Earth Leakage Circuit Breaker (ELCB) works on the principle of

Answer is:

residual current

24) The ELCB expansion form is

Answer is:

Earth Leakage Circuit Breaker

25) An ELCB must always be connected in the circuit

Answer is:

at the entry of supply to load after energy meter

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