Power Systems
In a power system with negligible resistance, the fault current at a point is 8.00 pu. The series reactance is to be included at the fault point to limit the short circuit. current to 5.00 pu is

  3.000 pu.
 0.125 pu.
 0.075 pu.
 0.200 pu.

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Power Systems
The draft tube is provided to

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

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