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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 EEGeneralAug 9ESE & GATE EE