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Power Systems

Power Systems
Condition for maximum voltage regulation

 tanφ = X/R
 cosφ = X/R
 tanφ = R/X
 cosφ = R/X

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

 turbine.
  feed water pump.
 condenser.
 superheater.

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

 δ and Q
 V and δ
 P and Q
 P and V

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Power Systems
Ferranti effect will not occur in which of the following transmission lines

All of these
 medium transmission lines
 long transmission lines
 short transmission lines

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Power Systems
Which cooling is preferred for large turbine generator

  Oxygen cooling.
  Nitrogen cooling.
  Hydrogen cooling.
  None of these.

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

 peak value
 any of the above
 average
 RMS

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