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Power Systems

Power Systems
Find the propagation constant, if impedance is 10Ω and admittance is 10 â„§?

 1
 100
 10
 5

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Power Systems
If R = 84 ohm/Km, G = 10-6 mho/Km, H = 0.01 H/Km, C = 0.061 μ F/Km and frequency = 1000 Hz, then what is the value of propagation constant of the transmission line

 None of them.
 0.018 per Km.
 0.01 + j 0.02 per Km.
 0.09 + j 0.018 per Km.

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Power Systems
In a 3-phase transmission line, each phase is supported by 3 insulated discs, maximum voltage of each disc is 20 kV. Find the operating voltage of the transmission line per phase if efficiency of string is 80.6%.

 20 kV
 83.76 kV
 48.36 kV
 52.84 kV

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Power Systems
Reflector of a nuclear reactor are made up of

 steel.
  boron.
 cast iron.
  beryllium.

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Power Systems
Alternate formation and breakage of bubbles are called

  water hamming.
All of these
  cavitations.
  surgfication.

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Power Systems
For variable heads of near about but less than 30 m, which type of turbines is used hydro power plant

 Pelton.
  Kaplan.
 Francis.
 None of above.

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