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Power Systems

Power Systems
The angular moment of 10 MVA generator is 0.2. Find the new value of angular moment for 20 MVA base?

 0.1 pu
 0.2 pu
 0.4 pu
 0.25 pu

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Power Systems
Which of the following statements is/are true? Corona is reduced by

All of these
 increasing the distance between the conductor
 increasing the radius of the conductor
 decreasing the supply frequency

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Power Systems
Taking the density of water to be 1000 kg/m³, how much power would be developed by a hydro electric generator unit, assume 100% efficiency, with 1 m head and 1 m³/s discharge?

 9.81 kW
 4.45 kW
 19.60 kW
 2.90 kW

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Power Systems
A 3 core cable gives on test a capacitance of 3.7 µF between two cores. Find the line charging current of the cable when it is connected to 11 kV, 50 Hz system?

 14.7 mA.
  14.76 A.
 1.476 A.
 1 A.

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Power Systems
Percentage of carbon is highest in

  lignite coal.
  bituminous coal.
  anthracite coal.
  coal gas.

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Power Systems
The conversion ratio of a breeder reactor is

  equal to unity.
 none of above.
  more than unity.
 less than unity.

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