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Power Systems

Power Systems
Uses of diesel power stations

All of these
 standby plants.
  peak load plant.
  emergency plants.

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Power Systems
Which of the following represents the sag(S) of a transmission line?

 S = wl²/16T
 S = wl²/2T
 S = wl²/4T
 S = wl²/8T

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Power Systems
A transmission line is operating under no load has ABCD parameters B = 100∠90° has a phase shift of 0.2 rad, how much shunt reactor is required for compensation of ferranti effect?

 2 H
 15.9 mH
 2 mH
 15.9 H

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Power Systems
The rating of fuse wire is always expressed in

  ampere-volts.
  kWh.
  amperes.
  ampere-hours.

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Power Systems
A coal fired steam power station working at a plant factor of 80% has one 500 MW generating unit. If the heat content of coal is 2 kWh/kg, the overall plant efficiency is 40% and a train load of coal is 2000 metric tons, then the number of trains required daily for the plant is

 16
 6
 2
 10

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Power Systems
Capacitance voltage transformer ( CVT ) is used to

 connect instruments on the LT side.
 reduce losses in a transmission line.
  improve the power factor of the transmission.
 none of these.

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