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Power Systems

Power Systems
Cheapest plant in operation and maintenance is

  hydroelectric.
  nuclear.
  diesel power.
  steam power.

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

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

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Power Systems
The insulation of the modern EHV lines is designed based on

 R × I.
  the switch voltage.
 corona.
 the lighting voltage.

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Power Systems
The positive sequence reactance will be equal to negative sequence if the equipment is

  transformer and transmission lines.
  motor.
  none of these.
  generator.

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

 1 pu
 0.25 pu
 5 pu
 0.2 pu

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Power Systems
In hydro power stations what is an enlarged body of water just above the intake and used as a regulating reservoir called

  Fore bay.
 Spillways.
 Reservoir.
 Penstock.

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