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Power Systems

Power Systems
Rankine cycle efficiency of a steam power plant is of

  60 - 80 %.
  45 - 80 %.
  20 - 30 %.
  30 - 45 %.

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Power Systems
Surge impedance loading of a 3-phase, 400 kV transmission line is 400 Ω. The surge impedance loading is

 400 MW
 200 MW
 800 MW
 1600 MW

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Power Systems
Deflectors are provided in

 Kaplan turbine.
 propeller turbine.
  Pelton wheel.
 Francis turbine.

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Power Systems
The positive (Z1), negative (Z2) and zero sequence (Z0) impedances of a transmission line follows the relation

 (Z1 = Z2) > Z0
 any of the above
 Z1 = Z2 = Z0
 (Z1 = Z2) < Z0

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Power Systems
Load frequency control is achieved by properly matching the individual machines

  reactive powers.
  generator ratings.
  generated voltages.
  turbine inputs.

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Power Systems
A power generating station has a maximum demand of 1000 MW. The annual load factor is 75% and plant capacity factor is 60%. Calculate the reserve capacity?

 750 MW
 250 MW
 500 MW
 1250 MW

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