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Power Systems

Power Systems
Range of accelerating factor is

 1 to 10
 50 to 100
 10.8 to 11.2
 1.6 to 1.8

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Power Systems
If a 500 MVA, 11 kV 3-phase generator at 50 Hz feeds through a transfer impedance of (0+j0.605) Ω/phase, an infinite voltage also at 11 kV, then the maximum steady state power transfer on the base of 500 MVA and 11 kV is

 0.8 pu
 1 pu
 0.5 pu
 0.4 pu

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Power Systems
Keeping in view the cost and overall effectiveness, the following circuit breaker is best suited for capacitor bank switching?

 Oil CB.
 SF6 CB.
  Vacuum CB.
 Air blast CB.

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Power Systems
A penstock is used as a condition between

 the heat ex-changer and the turbine in nuclear power plant.
  the dam and the turbine in a hydro station.
 the turbine and discharge drain.
 none of above.

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Power Systems
If power P available from a hydroelectric plant is given by the formula P = 9.81QH, where Q is the flow rate through the turbine in l / s and H is the head in meters, then P will be unit of

 kJ / S.
  W.
 HP.
 kWh.

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Power Systems
If skin depth is more, then skin effect is

 less
 either 1 or 2
 more
None of these

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