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JE 2019 || Day 28 || Estimation & Costing Quiz 1

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Question 1

The trip coil of a circuit breaker is connected through a C.T. of ratio 50:1. If the normal line current is 160 A and the circuit breaker is to operate at 125% of normal line current, the trip mechanism should be set to operate at a trip current of

Question 2

In case of frosted GLS lamps, frosting is done by

Question 3

In which of the following flame Oxygen is in same proportion with acetylene –

Question 4

In the power system, the resonance rarely occurs at the supply frequency because

Question 5

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

Question 6

In case of slow developing faults transformer, the Buchholz relay

Question 7

The earth fault current is generally ……….. than the short-circuit current.

Question 8

The most dangerous fault in an alternator is

Question 9

In 132 kV system, the phase to ground capacitance is 0.01 μA, and inductance is 6H. The voltage that appears across the contacts of circuit breaker if a magnetizing current of 10 A is interrupted is

Question 10

A fuse wire of circular cross-section has a radius of 0.8 mm. The wire blows off at a current of 8A. The radius of the wire that will blow off at a current of 1A is

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ESE & GATE EE General

Aug 9ESE & GATE EE