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Power Systems

Power Systems
Fault calculations using computer are usually done by

 Z bus method
 either 1 or 2
None of these
 Y bus method

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Power Systems
Telecommunication lines are transposed to reduce the

 efficiency
 radio interference in communication lines
 voltage level
All of these

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Power Systems
A power station has a maximum demand of 15000 kW. The annual load factor is 50% and plant capacity factor is 40%. What is the reserve capacity of the plant?

 3750 kW
 7500 kW
 6000 kW
 3000 kW

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Power Systems
The shape of the disc of an induction disc relay is

  circular.
  none of these.
  elliptical.
  spiral.

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Power Systems
In a long transmission line, if we increase the length of the line, the parameters A and B respectively

 decreases and decreases
 increases and decreases
 decreases and increases
 increases and increases

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Power Systems
The corona loss on a particular system at 60 Hz is 1 kW/km per phase. What is the corona loss at 50 Hz in kW/km per phase?

 1
 0.882
 1.13
 0.93

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