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Power Systems

Power Systems
The annual depreciation of hydro power plant is about

 15 - 20 %.
  0.5 - 1.5 %.
 20 - 25 %.
 10 - 15 %.

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Power Systems
The zero sequence current of a generator for line to ground fault is j3 pu. Then the current through the neutral during the fault is

 j3 pu
 j1 pu
 j9 pu
 j6 pu

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

  Boron.
 Thorium.
 Heavy water.
 Beryllium.

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Power Systems
The ratio of reset to pick up current for an induction cup relay is approximately

 0.75.
  0.99.
 1.35.
 1.0.

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Power Systems
Load frequency control is achieved by properly matching the individual machines

  reactive powers.
  generator ratings.
  generated voltages.
  turbine inputs.

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Power Systems
A transmission line is operating under no load has ABCD parameters B = 100∠90° has a phase shift of 0.2 rad, how much shunt reactor is required for compensation of ferranti effect?

 2 H
 15.9 H
 2 mH
 15.9 mH

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