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Power Systems

Power Systems
Condition for zero voltage regulation is

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

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Power Systems
Which of the following transmission line is most practically used in load flow analysis?

 either 1 or 2
 nether 1 nor 2
 Nominal T
 Nominal ∏

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Power Systems
String chart is drawn between

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

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Power Systems
The amount of ash content in Indian coal

  60 %.
 35 %.
 20 %.
  45 %.

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Power Systems
The value of diversity factor is

 greater than 1
 less than 1
 0
 1

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Power Systems
Mho relay is usually employed for protection of

 long transmission lines only
 short transmission lines only
 any line
 medium transmission lines only

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