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Power Systems

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

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

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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 mH
 2 H
 15.9 mH
 15.9 H

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Power Systems
A transmission line has an impedance of (2+j6) Ω has voltage regulation of 10% at a load power factor of 0.8 lag. Find the voltage regulation for a load of 0.6 lead

 -10%
 -6.92%
 10%
 6.92%

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Power Systems
Power transmission lines are transposed to reduce

 ferranti effect
 skin effect
 radio interference
 proximity effect

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Power Systems
Under over excitation synchronous phase modifier works as

 shunt capacitor
 shunt reactor
 any of the above
 series capacitor

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Power Systems
An over current relay, having a current setting of 125% connected to a supply circuit through a current transformer of ratio 500/5. The plug setting multiplier for a fault current of 5 kA is

 6
 2
 8
 5

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