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.
 0.075 pu.
 0.200 pu.
 0.125 pu.

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Power Systems
An hydro-graph indicates

 the discharge at any time during the period under consideration.
 the maximum and minimum run off during the period.
All of these
 the average run off during the period.

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