Power Systems
Pump storage schemes are used to improve

  the plant capacity factor as well as the load factor of the power system.
 the load factor.
 the diversity factor.
 the power factor.

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Power Systems
In a biased differential relay the bias is defined as the ratio of

  number of turns of restraining and operating coil.
  operating coil current and restraining coil current.
  fault current and operating coil current.
  fault current and restraining coil current.

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