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Power Systems

Power Systems
If the time of operation of a relay for unity TMS is 10 sec. the time of operation of 0.5 TMS will be _______________ secs.

 20.
  5.
 7.
 3.

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Power Systems
In kaplan runner, the number of blades is generally of the order of

  3 - 6.
 1 - 2.
 12 - 16.
  16 - 24.

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Power Systems
A thermal protection switch is used to provide protection against

 short circuit.
 temperature.
  overload.
 over voltage.

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Power Systems
Which of the following statements is/are true? In case of parallel transmission lines

 stability increases
 fault current reduces
 both 1 and 3
 fault current increases

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Power Systems
A thermal generating station has an installed capacity of 15 MW and supplies a daily load of 10 MW for 12 hours and 5 MW for remaining 12 hours. The plant capacity factor for the station is

 1
 0.75
 0.6
 0.5

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Power Systems
If the inertia constant H = 10 MJ/MVA for a 50 MVA generator, the stored energy is

 10 MJ
 5 MJ
 50 MJ
 500 MJ

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