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Power Systems

Power Systems
The per unit value of a 2 ohm resistor at 100 MVA and 10 kV base voltage is

 2 pu
 4 pu
 0.5 pu
 0.2 pu

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Power Systems
The rating of fuse wire is always expressed in

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

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Power Systems
Reflector nuclear reactor are made of

 steel.
  beryllium.
 cast iron.
 boron.

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Power Systems
Two identical synchronous machines having same inertia constant are connected in parallel and swinging together. The effective inertia constant is 4 MJ/MVA. Then each machine has inertia constant of

 8 MJ/MVA
 16 MJ/MVA
 2 MJ/MVA
 4 MJ/MVA

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Power Systems
What is the correct expression for the electrical power developed by

 ( 7 / 75 ) × WQHη.
 ( 75 / 0.736 ) × WQHη.
 75 × 0.736 × WQHη.
  ( 0.763 / 75 ) × WQHη.

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Power Systems
Keeping in view the cost and overall effectiveness, the following circuit breaker is best suited for capacitor bank switching?

 Oil CB.
  Vacuum CB.
 SF6 CB.
 Air blast CB.

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