Power Systems
Alternate formation and breakage of bubbles are called

  surgfication.
All of these
  water hamming.
  cavitations.

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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
The power level of nuclear reactor can be increase by ( K = multiplication factor )

 raising the value of K above 1 and keeping it at raised value.
 lowering the value of K below and keeping at that lowered value.
 lowering the value of K below 1 but later bringing it back to K = 1.
  raising the value of K above 1, but later bringing it back to K = 1.

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