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Power Systems

Power Systems
For complete protection of 3-phase system from the short circuit faults minimum number of relays required are

 three
 one
 six
 two

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Power Systems
The power output of a nuclear power station is proportional to

 square of the rate at which fission reaction occurs.
 square root of the rate at which fission reaction occurs.
 none of above.
  the rate at which fission reaction occurs.

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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 incident current?

 100 A
 2500 A
 200 A
 250 A

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Power Systems
Inductance of transmission line will decrease when

 GMD increase and GMR decrease
 both GMD and GMR decrease
 GMD decrease and GMR increase
 both GMD and GMR increase

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Power Systems
A hydraulic turbine having rated speed of 250 rpm is connected to a synchronous generator. In order to produce power at 50 Hz, the numbers of pole are required in the generator

 6.
 12.
 16.
  24.

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Power Systems
Find the propagation constant, if impedance is 10Ω and admittance is 10 â„§?

 100
 1
 10
 5

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