Power Systems
The power output of a nuclear power station is proportional to

 none of above.
 square root of the rate at which fission reaction occurs.
 square of the rate at which fission reaction occurs.
  the rate at which fission reaction occurs.

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Power Systems
Gross head of an hydroelectric power station is

 the height of water level in the river where the storage is provided.
  the difference of water level between the level in storage and tail race.
 all of above.
 the height of water level in the river where the tail race is provided.

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