Power Systems
An over current relay, having a current setting of 125% connected to a supply circuit through a current transformer of ratio 500/5. The plug setting multiplier for a fault current of 5 kA is

 5
 2
 8
 6

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Power Systems
The draft tube is provided to

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

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Power Systems
Half life is defined as

 the time required for full of atoms in a specimen disintegrate.
 none of above.
  the time required for one half of isotope to decay.
 the time required to spiliting of a heavy nucleus.

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