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Power Systems

Power Systems
Condition for zero voltage regulation is

 tanφ = X/R
 cosφ = X/R
 cosφ = R/X
 tanφ = R/X

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Power Systems
A transmission line has surge impedance of 400 Ω, operating at Vs = Vr = 400 kV line is compensated with a shunt capacitance of 30%. Find the surge impedance loading with compensation?

 456 MW
 478 MW
 386 MW
 400 MW

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Power Systems
Which of the following power planets is the least reliable

  Wind.
 Geothermal.
 Tidal.
 Solar.

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Power Systems
The function of reflector is to

 stop the chain reaction.
 reduce the speed of the neutrons.
  bounce back most of the neutrons that escape from the fuel core.
 none of above.

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Power Systems
A power station has a maximum demand of 15000 kW. The annual load factor is 50% and plant capacity factor is 40%. What is the reserve capacity of the plant?

 7500 kW
 3000 kW
 6000 kW
 3750 kW

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Power Systems
The rate of rise of restricting voltage depends upon the

 Inductance of the system.
 Capacitance of the system.
 Type of CB.
  Inductance and capacitance of the system.

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