Power Systems
In a short circuit test circuit breaker, time to reach the peak re-striking voltage 60 microsecond & the peak re-striking voltage 120 kV. Determine average RRRV (Rate of rise re-striking voltage)?

  3 × 106 kV / sec.
 1 × 106 kV / sec.
  2 × 106 kV / sec.
 3.5 × 106 kV / sec.

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Power Systems
A thermal power station needs space

 less than that required by atomic power station of the same output.
 less than that required by a gas turbine power plant of same output.
 less than that required by the diesel power station of same output.
  less than that required by hydro-power station of same capacity.

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