Power Systems
In an induction relay for a particular current setting the operating time 4 sec. When the time multiplier setting is 0.8 if the time multiplier setting is rest to 1 the operating time is

  1.
 5.
 10.
  un changed.

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Power Systems
An hydro-graph indicates

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

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