ISRO Technician-B Electrician Question Paper - 2017 (Set - 1) with Answer Key

ISRO Technician-B Electrician Question Paper - 2017 (Set - 1) with Answer Key

31) What precaution to be taken while disconnecting the ammeter from terminals of CT (Current Transformer)?

Answer is:

Short circuiting the terminal of the CT before disconnecting the ammeter

32) What is the purpose of providing a mirror behind the pointer in a measuring instrument?

Answer is:

To make the reading free from an error by removing parallax between the pointer and its image

33) The minimum conductor area of a copper conductor used in power sub circuit should be

Answer is:

1.5 square millimeter

34) An industry has 200 numbers of 200 W light load. How many numbers of sub circuits are required?

Answer is:

50

35) In domestic wiring neutral line is typically identified with a colour of

Answer is:

Black

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