Power Systems
An over current relay, having a current setting of 125% connected to a supply circuit through a current transformer of ratio 400/5. The pick up value is

 15 A
 6.25 A
 12.5 A
 10 A

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Power Systems
An hydro-graph indicates

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

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Power Systems
The factor affecting run off are

  all of above.
 rain fall pattern, shape and size of catchment area.
 amount of vegetation and weather condition in the catchment area.
 the topography and nature of soil in the catchment area.

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