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JE 2019 || Day 29 || Estimation & Costing Quiz 2

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Question 1

The breaking capacity of SF₆ circuit breaker is not affected by

Question 2

A circuit breaker is rated as 1500 A, 1000 MVA, 33 kV, 3-second, 3-phase oil circuit breaker, the rated symmetrical breaking current is

Question 3

The type of protection that does not respond to faults occurring beyond its zone even though the fault current may pass thro’ the zone is:

Question 4

What is the dimension of the copper strips used for the strip earthing?

Question 5

A directional overcurrent protection consists of

Question 6

For very long high voltage transmission lines, the system of overcurrent protection used is

Question 7

A fuse is always connected in

Question 8

If the fault current is 2000 A, the relay setting 50% and C.T. ratio is 400/5 A, the P.S.M. is

Question 9

Capacitive current breaking results in

Question 10

An isolator is designed to open a circuit under

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Jun 29ESE & GATE EE