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Power Systems

Power Systems
Which of the following materials is/are used as moderators?

 graphite
All of these
 beryllium
 heavy water

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Power Systems
Surge impedance loading (SIL) is represented by

 both 1 and 2
 Vph²/Zs
 Vl²*√(C/L)
 Vl²/Zs

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Power Systems
A 3-phase transmission line operating at Vs = 400 kV and has ABCD parameters A= D = 0.8∠0°, B = 100∠90° Ω, C = 0.5*10-6∠90° â„§. Find the no load receiving end voltage?

 500 kV
 400 kV
 320 kv
 600 kV

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Power Systems
A 25 MVA, 11 kV alternator is supplying full load at a point of 0.75 lagging. Determine the percentage increase in earning capacity when it is operated at improved power factor of 0.96 lagging.

  56 %.
  28 %.
  None of above
  14 %.

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Power Systems
The annual depreciation of hydro power plant is about

 20 - 25 %.
 10 - 15 %.
 15 - 20 %.
  0.5 - 1.5 %.

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Power Systems
In triangular configuration, inductance and capacitance values are ------ and ------ respectively

 higher, less
 higher, higher
 less, less
 less, higher

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