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Power Systems

Power Systems
Galvanised steel is generally used as

 earth wire.
All of these
 stray wire.
 structural components.

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Power Systems
A fault occurring at the terminals of an unloaded synchronous generator operating at its rated voltage has resulted in the following values of currents and voltages. IR0 = j 2.37 pu IR1 = -j 3.05 pu IR2 = j 0.68 pu VR0 = VR1 = VR2 = 0.237 pu. Which of the following faults has occurred?

 LL
 LLG
 LLL
 LG

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Power Systems
Bundled conductors in EHV transmission lines

 increase inductance
 decrease inducatance
 decrease capacitance
 increase capacitance

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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

  30.7 %.
 40 %.
 40.85 %.
  30.26 %.

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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

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

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Power Systems
Which of the following buses is/are not PV buses?

 voltage control buses
 fixed shunt capacitor buses
 both 1 and 2
 reactive power support buses

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