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Power Systems

Power Systems
Galvanised steel is generally used as

 earth wire.
 stray wire.
 structural components.
All of these

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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

 50.
 15.
 10.
 25.

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Power Systems
Bundled conductors in EHV transmission lines

 decrease capacitance
 decrease inducatance
 increase capacitance
 increase inductance

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Power Systems
A loss less transmission line has a length of 600 km, find the phase shift of voltage signal?

 42°
 45°
 36°
 90°

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Power Systems
For 66 kV lines the number of insulator discs of each 11 kV used are

 12
 3
 5
 6

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Power Systems
A thermal protection relay provides protection against what?

 any of the above
 Short circuit
 Temperature
 Over load

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