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Power Systems

Power Systems
Proximity effect is more in case of

 power cables
None of these
 same in both cases
 over head lines

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Power Systems
Reflector nuclear reactor are made of

 cast iron.
 steel.
  beryllium.
 boron.

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Power Systems
Stock bridge dampers are used in case hill areas to over come the which problem?

All of these
 increase string efficiency
 increase power factor
 unequal ice loading

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Power Systems
Skin effect depends on

 relative permeability
All of these
 frequency
 conductivity

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Power Systems
Mechanical energy is supplied to a DC generator at the rate of 4200 J / S. The generator delivers 32.2 Amp at 120 V. How much energy is cost per minute of operation

  20060 J.
 23060 J.
  20160 J.
 25060 J.

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Power Systems
Which of the following is/are the desirable properties of a insulator material?

 High ratio of puncture strength to flash over.
 High relative permittivity
 Both 1 and 2
 Low ratio of puncture strength to flash over.

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