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Power Systems

Power Systems
Which of the following quantities are to be calculated for generator bus?

 P and V
 P and Q
 Q and δ
 δ and V

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Power Systems
A 25 MVA, 11 kV alternator is supplying full load at a point of 0.75 lagging. Determine the percentage increase in earning capacity when it is operated at improved power factor of 0.96 lagging.

  28 %.
  56 %.
  None of above
  14 %.

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Power Systems
MCB stands for

  maximum capacity breaker.
  miniature circuit breaker.
  minimum capacity breaker.
  molded circuit breaker.

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Power Systems
In a 3-phase transmission line, each phase is supported by 3 insulated discs, maximum voltage of each disc is 20 kV. Find the operating voltage of the transmission line per phase if efficiency of string is 80.6%.

 83.76 kV
 52.84 kV
 20 kV
 48.36 kV

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Power Systems
Which turbine is ideally suited to pumped storage plants

 Pelton.
 Impeller.
  Kaplan.
 Francis.

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Power Systems
Which material is used in controlling chain reaction in a nuclear reactor

 Heavy water.
 Beryllium.
 Thorium.
  Boron.

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