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Power Systems

Power Systems
In a 3-phase, 5 kV, 5 MVA system, what is the base impedance?

 5 ohms
 50 ohms
 500 ohms
 0.5 ohm

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Power Systems
Corona is accompanied by

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

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Power Systems
Which of the following is/are advantages of N-R method?

 Time taken for each iteration is less
 Number of iterations are less
 both 1 and 2
 Applicable for large power system network

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Power Systems
The maximum efficiency of modern coal fired steam steam raising thermal power plants is restricted to about 0.35( a low value), mainly because of

 low steam turbine mechanical efficiency
 high energy loss in boilers
 high energy loss in condenser
 low alternator efficiency

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Power Systems
A diesel power station has fuel consumption of 0.28 Kg per kWh. The calorific value of fuel is being 10000 KCal / kg. Determine the overall efficiency

  30.26 %.
 40 %.
 40.85 %.
  30.7 %.

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Power Systems
The conversion ratio of breeder reactor are

 1.
  greater than 1.
 none of above.
 less than 1.

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