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SSC JE 2017: Switch-Gear & Protection Rankers Quiz 4

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Question 1

In a motor starter, the electromechanical contractor provides inherent protection against

Question 2

Supplier’s fuse, which is provided in domestic wiring system is

Question 3

The normal current in a power line is 100 A. If a short-circuit fault occurs on the line, then one can expect the short-circuit current to be

Question 4

As compared to station equipment (e.g. alternators, transformers etc), the chances of faults on overhead lines are

Question 5

Which among following options are correct in case of operating an isolator circuit breakers and earthing switch in a circuit?

Question 6

A distance relay with inherent directional property is known as

Question 7

Consider the following circuit breakers for 220 kV substations:
1) Air
2) SF₆
3) Vacuum
Which of the above circuit breakers can be used in an indoor substation?

Question 8

To protect the power transformer (Y-Y with neutral grounded ) against fault, what type of connection do the CTs have?

Question 9

The Making and Breaking currents of 3 phase AC Circuit Breakers in Power system are respectively :

Question 10

The restriking voltage is measured in

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ESE & GATE EE Power Systems

Jun 15ESE & GATE EE