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Power Systems

Power Systems
Plant capacity factor value is

 1
 0
 greater than 1
 less than 1

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Power Systems
For symmetrical network, the neutral current is

 infinity
 any of the above
 maximum
 zero

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Power Systems
Where air circuit breakers are used?

  Up to 66 kV.
  Up to 33 kV.
  Up to 12 kV.
  Up to 11 kV.

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Power Systems
Which of following generating plants has the minimum operating cost

 Hydroelectric plant.
 Nuclear plant.
 Diesel plant.
 Steam plant.

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Power Systems
A string insulator has 4 units. The voltage across bottom most unit is 10 kV and its efficiency is 90%. Find the total operating phase voltage?

 40 kV
 45 kV
 36 kV
 32 kV

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Power Systems
A transmission line has impedance of (0.005 + j0.05) pu. Find the line at which maximum value of negative DC off set current is produced, if it is applied with Vm sinωt?

 4.68 msec
 1.47 msec
 2.63 msec
 9.68 msec

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