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Power Systems

Power Systems
Ideal plant load cfactor is

 less than 1
 greater than 1
 1
 0

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Power Systems
Which of the following statements is/are true? Due to corona,

 power loss increases
 charging current increases
 interference increases
All of these

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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)?

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

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Power Systems
If the fault is very nearer to the generator, the fault current is

 larger
 less
 zero
 any of the above

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Power Systems
A transmission line has a surge impedance of 400 Ω is connected with the cable having surge impedance of 40 Ω, a surge magnitude of 100 kV is travelling from the transmission line towards the cable. Find the transmitted voltage?

 100 kV
 36. 36 kV
 30.6 Kv
 18.18 kV

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Power Systems
Zero sequence currents can flow from a line into a transformer bank if the windings are in

 star / grounded star.
  ground star / delta.
 delta / star.
 delta / delta.

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