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Power Systems

Power Systems
Percentage of carbon is highest in

  coal gas.
  lignite coal.
  anthracite coal.
  bituminous coal.

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Power Systems
The power output of a nuclear power station is proportional to

 none of above.
 square of the rate at which fission reaction occurs.
 square root of the rate at which fission reaction occurs.
  the rate at which fission reaction occurs.

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Power Systems
Efficiency of thermal power plant can be taken as

  turbine efficiency.
  product of efficiencies of all stages.
  generator efficiency.
  efficiency of thermal cycle.

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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

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

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Power Systems
When a transformer is loaded, the secondary terminal voltage gains. That means power factor is

 zero.
 lagging.
 unity.
  leading.

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Power Systems
If we increase the spacing between the phase conductors, the line capacitance

 decreases
None of these
 increases
 remains unaffected

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