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Power Systems

Power Systems
Uses of diesel power stations

 standby plants.
  peak load plant.
All of these
  emergency plants.

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Power Systems
If a 500 MVA, 11 kV 3-phase generator at 50 Hz feeds through a transfer impedance of (0+j0.605) Ω/phase, an infinite voltage also at 11 kV, then the maximum steady state power transfer on the base of 500 MVA and 11 kV is

 0.5 pu
 0.4 pu
 0.8 pu
 1 pu

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Power Systems
Find the characteristic impedance of a transmission line, if impedance is 16 Ω and admittance is 0.1 mâ„§?

 160 Ω
 200 Ω
 400 Ω
 320 Ω

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Power Systems
Maximum power transfer in a transmission line can be obtained by

 either 1 or 2
None of these
 increasing voltage level
 reducing reactance

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Power Systems
A cable has inductance of 0.22 mH per km and capacitance of 0.202 µF per km. The surge impedance of the cable is

 28 Ω
 33 Ω
 40 Ω
 52 Ω

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Power Systems
Which of the following statements is/are true? Corona is reduced by

 increasing the distance between the conductor
 increasing the radius of the conductor
All of these
 decreasing the supply frequency

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