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Power Systems

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

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

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Power Systems
A network containing 100 buses in which 10 are the voltage control buses, 5 are fixed shunt capacitor buses, 20 are the reactive power support buses, 6 are the generator buses. Find the size of the Jacobian matrix?

 164 × 164
 162 × 162
 165 × 165
 163 × 163

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Power Systems
Corona is accompanied by

 power loss and interference
All of these
 hissing sound
 violet visible light

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Power Systems
Two insulator discs of identical capacitance value C make up a string for a 22 kV, 50 Hz, single phase overhead line insulation system. If pin to earth capacitance is also C, then find the string efficiency?

 50%
 90%
 75%
 86%%

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Power Systems
A thermal generating station has an installed capacity of 15 MW and supplies a daily load of 10 MW for 12 hours and 5 MW for remaining 12 hours. If the load factor is 0.8. Find the reserve capacity of the station?

 10 MW
 9 MW
 5 MW
 18 MW

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Power Systems
Which of the following is/are the desirable properties of a insulator material?

 High ratio of puncture strength to flash over.
 Low ratio of puncture strength to flash over.
 High relative permittivity
 Both 1 and 2

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