Power Systems
The power output from an hydroelectric plants depend on

  discharge, system efficiency.
 type of turbine, type of dam and type of catchment area.
 type of dam, head, system efficiency.
 type of dam, type of catchment area and discharge.

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

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Power Systems
Critical mass is

 a mass of fissionable material required to stop a chain reaction.
 maximum mass of fissionable material required to sustain a chain reaction.
  minimum mass of fissionable material required to sustain chain reaction.
 none of these.

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