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Power Systems

Power Systems
Reflector of a nuclear reactor are made up of

  beryllium.
 cast iron.
 steel.
  boron.

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Power Systems
Find the relation between sub transient (X"), transient (X') and synchronous reactance (X) ?

 X" < X' > X
 X" < X' < X
 X" > X' >X
 X" > X' < X

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Power Systems
In which power plant, the thermal efficiency is quite low

  Nuclear power plant.
  Steam power plant.
  Hydro power plant.
  Diesel power plant.

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Power Systems
The insulation of the modern EHV lines is designed based on

 corona.
 R × I.
 the lighting voltage.
  the switch voltage.

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Power Systems
The inertia constant of 100 MVA, 50 Hz, 4 pole generator is 10 MJ/MVA. If the mechanical input to the machine is suddenly raised from 50 MW to 75 MW, the rotor acceleration will be equal to

 225 electrical degrees/s²
 22.5 electrical degrees/s²
 125 electrical degrees/s²
 12.5 electrical degrees/s²

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Power Systems
Bonding is done at the both ends of the cable to reduce the

 sheath loss
 copper loss
None of these
 iron loss

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