Power Systems
Zero voltage regulation is possible only for

 unity power factor
 lagging power factor
 leading power factor
All of these

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Power Systems
The modern trend in electric power generation

 to have large size thermal plants near load centre.
 to have large size thermal plant located near coal fields.
  none of above.
 to have large number of small size thermal plants located at different places.

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Power Systems
Gross head of an hydroelectric power station is

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

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