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Power Systems

Power Systems
The corona loss on a particular system at 60 Hz is 1 kW/km per phase. What is the corona loss at 50 Hz in kW/km per phase?

 1
 0.93
 1.13
 0.882

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Power Systems
Stock bridge dampers are used to

 increase the sag
 reduce the vibrations at the point of support
All of these
 reduce the tension

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Power Systems
A transmission line has an impedance of (2+j6) Ω has voltage regulation of 10% at a load power factor of 0.8 lag. Find the voltage regulation for a load of 0.6 lead

 -6.92%
 -10%
 10%
 6.92%

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Power Systems
If, for a given alternator in economic operation mode, the incremental cost is given by (0.012 P + 8) Rs/MWh, dPL/dP = 0.2 and plant λ = 25, then power generation is

 1250 MW
 1000 MW
 1500 MW
 750 MW

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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„§?

 400 Ω
 200 Ω
 320 Ω
 160 Ω

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Power Systems
Deaerative heating is done to

 heat the feed water.
 remove dissolved.
  remove dissolved gases in water.
 heat the steam.

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