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Power Systems

Power Systems
Which of following materials can be used as coolant

 CO2.
 Heavy water.
  Any of above.
 Helium.

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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
Graphite is use din nuclear plant as a / an

 electrode.
 coolant.
 fuel.
  moderator.

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Power Systems
Rating of fuse wire is expressed in

  Mho.
  Watts.
 ÃŽÂ©.
  Ampere.

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Power Systems
Peterson coil is used in case of transmission line for

 compensation of arcing grounds
 increase the voltage level
 reduce ferranti effect
 improve power factor

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Power Systems
The characteristic impedance of a transmission line is

 Independent of its length.
 Directly proportional to its length.
 Directly proportional to square root of its length.
 Inversely proportional to square root of its length.

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