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Power Systems

Power Systems
A 10 MVA generator has reactance of 0.2 pu. Find the new reactance value for 50 MVA base?

 0.2 pu
 1 pu
 0.25 pu
 5 pu

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Power Systems
Reflector nuclear reactor are made of

 steel.
  beryllium.
 cast iron.
 boron.

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Power Systems
For 132 kV system, the reactance and capacitance up to the location of the CB is 3 Ω and 0.015 μF respectively. The maximum value of RRRV is

 2.0 kV / μs.
  9.01 kV / μs.
 10.01 kV / μs.
 12.2 kV / μs.

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Power Systems
If a fault occurs on any feeder, the fault current is

  equal to unsectional bus bar.
  none of these.
  much lower than with unsectional bus bar.
  much higher than with unsectional bus bar.

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Power Systems
Which of the following contributes to the Rankine cycle efficiency improvement in a thermal power plant

 Reheat of steam an intermediate stages.
All of these
 Use of high pressure.
 Use of steam for heating of boiler feed water.

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Power Systems
A transmission line has a reactance of 1 Pu is operating at Vs = Vr = 1 Pu. The generator is connected at source end which is delivering 0.5 Pu of active power. Find the load angle?

 30°
 60°
 35°
 45°

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