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Power Systems

Power Systems
Reflector nuclear reactor are made of

 steel.
 boron.
  beryllium.
 cast iron.

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Power Systems
Graphite is use din nuclear plant as a / an

  moderator.
 fuel.
 coolant.
 electrode.

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Power Systems
Corona is accompanied by

 power loss and interference
 violet visible light
 hissing sound
All of these

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Power Systems
In a thermal power plants, pressure in the working fluid cycle is developed by

 superheater.
 turbine.
  feed water pump.
 condenser.

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Power Systems
If the frequency is increased, then skin effect will

 any of the above
 increases
 decreases
 remains unaffected

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Power Systems
The positive, negative and zero sequence impedances of a transmission line are 0.5,0.5 and 1.1 pu respectively. The self (Zs) and mutual (Zm) impedances of the line will be given by

 Zs = 0.7 pu, Zm =0.2 pu
 Zs = 0.5 pu, Zm =0.6 pu
 Zs = 0.6 pu, Zm =0.5 pu
 Zs = 0.2 pu, Zm =0.7 pu

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