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Power Systems

Power Systems
The amount of ash content in Indian coal

  45 %.
 20 %.
  60 %.
 35 %.

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Power Systems
How much KWh energy is produced by fission of 1 gm of uranium U235

  24000 kWh.
  24 kWh.
 2400 kWh.
 240 kWh.

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Power Systems
Proximity effect depends on

All of these
 distance between the conductors
 relative permeability
 frequency

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Power Systems
What is the approximate efficiency of a normal thermal power station?

 20-25%
 60-70%
 45-55%
 30-40%

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Power Systems
Power system network has a total power of 5000 MW at 50 Hz supplying to the different consumers. Frequency is varying at 1.5% per change of 2% load. Assume R =0.004 Hz/MW. Find the steady state frequency deviation if a sudden loss of 200 MW occur due to tripping of one of the transmission line?

 0.52 Hz
 -0.52 Hz
 0.48 Hz
 50 Hz

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Power Systems
The specific speed ( NS ) of turbine is given by

  N√( P ) / H1.25.
 none of these.
 P√( N ) / H3/2.
 N√( P ) / H2/3.

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