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Power Systems

Power Systems
A 10 MVA generator has reactance of 0.2 pu. Find the new reactance value for 50 MVA base?

 1 pu
 0.25 pu
 5 pu
 0.2 pu

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Power Systems
Critical visual voltage is the voltage at which

 corona is visible with blue or violet colour
 corona is just initiated
None of these
 both 1 and 2

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Power Systems
A sort line with R/X ratio 1, the zero regulation is obtained when the power factor of the load is

 0.5
 0 leading
 unity
 0.707 leading

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Power Systems
Generation of of one watt needs about ______________ fission per second

  3.1 × 1010.
 3.1.
 3.1 × 106.
 3.1 × 107.

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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 %.
  30.7 %.
 40.85 %.

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Power Systems
Find the number of insulator discs required in string insulator, if operating voltage is 220 kV and maximum voltage of each disc is 11 kV?

 20
 13
 10
 21

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