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Power Systems

Power Systems
In kaplan runner, the number of blades is generally of the order of

 12 - 16.
  16 - 24.
  3 - 6.
 1 - 2.

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Power Systems
The pu parameters for a 500 MVA machine on its own base are: Inertia, H = 20 pu; reactance X = 2 pu. The pu values of inertia and reactance on 100 MVA common base, respectively, are

 100, 0.4
 4, 10
 4, 0.4
 100, 10

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Power Systems
Which turbine is ideally suited to pumped storage plants

  Kaplan.
 Impeller.
 Francis.
 Pelton.

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Power Systems
The area under a flow duration curve represents

 total power available.
 maximum rate of run-off during the period.
 total of units of energy available.
  total quantity of run-off during that period.

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

 average
 RMS
 any of the above
 maximum

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Power Systems
Making and breaking currents of 3 phase AC circuit breakers in power system are respectively in what form?

 any of the above
 RMS and RMS value
 RMS and Instantaneous value
 Instantaneous and RMS value

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