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Power Systems

Power Systems
Pin insulators are used up to

 11 kV
 33 kV
 120 kV
 any voltage level

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Power Systems
One million cubic meters of water is stored in a reservoir feeding a water turbine. The density of water is 993 kg/m³. If the centre of mass of water is 50 meters above the turbine and losses are negligible, the energy produced by that volume of water is

 130.2 MWhr
 140 MWhr
 120 MWhr
 135.3 MWhr

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Power Systems
Under excited Synchronous phase modifier works as

 series capacitor
 shunt capacitor
 any of the above
 shunt reactor

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Power Systems
If the fault current is 2000 A, the relay setting is 50% and CT ratio is 400 : 5, then plug setting multiplier will be

 15.
 25.
 50.
 10.

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Power Systems
If we increase the spacing between the phase conductors, the line capacitance

 remains unaffected
None of these
 increases
 decreases

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Power Systems
The charging current of a 400 kV line is more than that of a 220 kV line of the same length?

 either 1 or 2
None of these
 False
 True

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