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Power Systems

Power Systems
In thermal plant most of the energy is wasted in

 condenser
 turbines
 ESP
 boiler

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Power Systems
The function of draft tube is reaction turbine is to

 reduce water hammer.
  convert kinetic energy of water.
 all of above.
 increase flow rate of water.

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

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

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Power Systems
If the fault is very nearer to the generator, the fault current is

 any of the above
 zero
 larger
 less

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Power Systems
In a 400 kV power network, 360 kV is recorded at 400 kV bus. The reactive power absorbed by a shunt reactor for 50 MVAr, 400 kV connected at the bus is

 45.0 MVAr.
  40.5 MVAr.
 61.73 MVAr.
 55.56 MVAr.

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Power Systems
Consider a long, two wire line composed of solid round conductors. The radius of both conductors is 0.25 cm and distance between their centers is 100 cm. If this distance is doubled, then the inductance per unit length.

 Halves.
 Decrease but does not halves.
  Increase but does not doubled.
 Doubled.

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