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Power Systems

Power Systems
Which of the following quantities are to be calculated for generator bus?

 δ and V
 Q and δ
 P and V
 P and Q

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Power Systems
If a generator of 250 MVA rating has an inertia constant of 6 MJ/MVA, its inertia constant on 100 MVA base is

 2.5 MJ/MVA
 15 MJ/MVA
 6 MJ/MVA
 10.5 MJ/MVA

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Power Systems
The positive (Z1), negative (Z2) and zero sequence (Z0) impedances of a transmission line follows the relation

 (Z1 = Z2) > Z0
 (Z1 = Z2) < Z0
 any of the above
 Z1 = Z2 = Z0

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

 1
 0.89
 1.13
 1.25

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Power Systems
Zero voltage regulation is possible only for

 leading power factor
 lagging power factor
 unity power factor
All of these

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Power Systems
In a long transmission line, if we increase the length of the line, the parameters A and B respectively

 increases and decreases
 decreases and decreases
 decreases and increases
 increases and increases

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