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Power Systems

Power Systems
The insulator thickness on the conductor, in cables depends upon

 current
 reactive power
 voltage
 power factor

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Power Systems
The line current IR flowing into balanced delta connected load is - j5 - 3 A. If the phase sequence is RYB the phase current IYB is

  5.
 20.
 10.
 55.1.

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Power Systems
The rating of fuse wire is always expressed in

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

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Power Systems
Communications lines are treated as

 medium transmission lines
 long transmission lines
 any of the above
 short transmission lines

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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?

 1.13
 0.882
 1
 0.93

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Power Systems
Which of the following materials is/are used as moderators?

 heavy water
 graphite
All of these
 beryllium

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