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Electrician Set-2
Basic wiring practice
33

Basic wiring practice MCQ with Answers

33) Calculate the earth fault loop impedance, if the ELCB tripping current is 30 mA?

166 Ohm

1666 Ohm

16.66 Ohm

16666 Ohm

Answer is:

1666 Ohm

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Related Basic wiring practice MCQ with Answers

34) What is length of thread on rigid conduits as per BIS?

9mm - 20mm

11mm - 27mm

13mm - 25mm

15mm - 30mm

Answer is:

11mm - 27mm

35) Which type of conduit used for gas tight explosive installation?

Flexible conduits

Rigid steel conduits

Rigid non-metallic conduits

Flexible non-metallic conduits

Answer is:

Rigid steel conduits

36) What is the function of circuit breaker?

Making contact at normal condition

Making contact at abnormal condition

Breaking automatically at abnormal condition

Physical breaking contact at abnormal condition

Answer is:

Breaking automatically at abnormal condition

37) What is the function of bimetallic strip in MCB ?

Over load protection

Short circuit protection

Over voltage protection

Earth leakage protection

Answer is:

Over load protection

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