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Power Systems

Power Systems
Breaking current is a ------------------ value?

 any of the above
 maximum
 average
 RMS

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Power Systems
Consider a long, two wire line composed of solid round conductors. The radius of both conductors is 0.25 cm and distance between their centers is 100 cm. If this distance is doubled, then the inductance per unit length.

  Increase but does not doubled.
 Decrease but does not halves.
 Halves.
 Doubled.

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Power Systems
In a 400 KV network, 360 KV is recorded at a 400 KV bus. The reactive power absorbed by shunt rated for 50 MVAr, 400 KV connected at the bus is

 61.73 MVAr.
  40.5 MVAr.
 45 MVAr.
 55.56 MVAr.

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Power Systems
Advantages of per unit system is/are

 Need of transformation ratio
 No units for any quantity
All of these
 It has units for all quantities

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Power Systems
The overall efficiency of a steam power plant equal to

  product of boiler efficiency, turbine efficiency and generator efficiency.
 regenerative cycle.
 the Rankine cycle.
 binary vapor cycle.

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Power Systems
Pumped storage plant is a

None of these
 base load plant
 peak load plant
 both 1 and 2

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