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Power Systems

Power Systems
Making current is a------------ value?

 peak value
 any of the above
 average
 RMS

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Power Systems
A hydraulic turbine having rated speed of 250 rpm is connected to a synchronous generator. In order to produce power at 50 Hz, the numbers of pole are required in the generator

 6.
  24.
 12.
 16.

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Power Systems
Deaerative heating is done to

 heat the feed water.
  remove dissolved gases in water.
 remove dissolved.
 heat the steam.

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Power Systems
Two identical synchronous machines having same inertia constant are connected in parallel and swinging together. The effective inertia constant is 4 MJ/MVA. Then each machine has inertia constant of

 4 MJ/MVA
 8 MJ/MVA
 2 MJ/MVA
 16 MJ/MVA

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Power Systems
A thermal protection switch is used to provide protection against

 over voltage.
 temperature.
  overload.
 short circuit.

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Power Systems
In hydro power stations what is an enlarged body of water just above the intake and used as a regulating reservoir called

 Penstock.
  Fore bay.
 Reservoir.
 Spillways.

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