Power Systems
The factor affecting run off are

 rain fall pattern, shape and size of catchment area.
 the topography and nature of soil in the catchment area.
 amount of vegetation and weather condition in the catchment area.
  all of above.

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

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

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Power Systems
Gas coolled reactor

  both B and C.
 use heavy water as coolant as well as moderator.
 use coolant at pressure of 14-28 Kg/cm2 and at temperature of 700°-800° c.
 use CO2. or helium as coolant and graphite the moderator.

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