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Power Systems

Power Systems
Condition for zero voltage regulation is

 cosφ = R/X
 cosφ = X/R
 tanφ = X/R
 tanφ = R/X

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Power Systems
The fact that current density is higher at the surface when compared to centre is known as

All of these
 proximity effect
 carona
 skin effect

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Power Systems
A 200 MW capacity generator has a speed regulation of 4% for a frequency drop of 0.05 Hz. Find the power input supplied by the turbine for maintaining constant frequency?

 10 MW
 5 MW
 15 MW
 20 MW

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Power Systems
A power generating station has a plant capacity of 200 MW and maximum power demand is 150 MW. If average power generation is 110 MW, then find the load factor and capacity factor respectively?

 0.733 and 0.65
 0.733 and 0.55
 0.55 and 0.733
 0.65 and 0.55

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Power Systems
String chart is drawn between

 both 1 and 2
 nether 1 nor 2
 T on Y-axis and S and T on on X-axis
 temperature (T) on X- axis, sag(S) and tension (T) on Y-axis

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Power Systems
Corona is accompanied by

 power loss and interference
 hissing sound
All of these
 violet visible light

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