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Power Systems

Power Systems
For load flow studies, What are the quantities specified at load bus are

 δ and Q
 P and Q
 P and V
 V and δ

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Power Systems
For complete protection of 3-phase system from the short circuit faults minimum number of relays required are

 six
 three
 one
 two

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Power Systems
The power output of a nuclear power station is proportional to

 none of above.
 square root of the rate at which fission reaction occurs.
  the rate at which fission reaction occurs.
 square of the rate at which fission reaction occurs.

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Power Systems
A fuse wire of circular cross-section has a radius of 0.8 mm. The wire blows off at an current of 8 Amp. Calculate the radius of wire that will blow off at an current of 1 amp?

 4 mm.
 0.4 mm.
  0.2 mm.
 2 mm.

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Power Systems
In which of the following frequency control method tie line may be overloaded?

 flat tie line control
 parallel frequency
 flat frequency control
All of these

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Power Systems
For variable heads of near about but less than 30 m, which type of turbines is used hydro power plant

 None of above.
  Kaplan.
 Francis.
 Pelton.

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