Power Systems
The draft tube is provided to

None of these
 raise the water surface of the stream to create an artificial head.
 reduce the effect of water hammer.
  increase the acting head on the water wheel.

ANSWER DOWNLOAD EXAMIANS APP

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

ANSWER DOWNLOAD EXAMIANS APP