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Power Systems

Power Systems
Galvanised steel is generally used as

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

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Power Systems
Which of the following faults is/are treated as external faults?

 Failure of prime mover of the generator
 Failure of excitation
All of these
 Over voltage

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Power Systems
The per unit impedance of a circuit element is 0.30. If the base kV and base MVA are halved, then the new value of the per unit impedance of the circuit element will be

 0.30
 0.60
 0.0060
 0.0030

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Power Systems
In a thermal power plants, pressure in the working fluid cycle is developed by

  feed water pump.
 superheater.
 turbine.
 condenser.

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Power Systems
If the percentage reactance of an element is 20 % and the full load current is 50 Amp, the short circuit current will be

  250 Amp.
 350 Amp.
 300 Amp.
 200 Amp.

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Power Systems
Apart from the skin effect the non uniformity of the current distribution is also caused by

 bundled conductors
 ferranti effect
 proximity effect
All of these

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