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Power Systems

Power Systems
Ferranti effect occurs under

 any of the above
 half load
 full load
 no load

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Power Systems
For some given transmission line the expression for voltage regulation is given by (Vs - Vr)/Vr *100%. Hence,

 this expression is true for any line
 this must be a short line
None of these
 this may either be a medium line or short line

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Power Systems
The use of high speed circuit breakers

 reduces the short circuit current.
  improves system stability.
 decrease system stability.
 increased the short circuit current.

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Power Systems
The voltage regulation of a line at full load 0.8 power factor is 11. A long transmission line under no load conditions, for a good voltage profile needs

 shunt capacitor at receiving end
 shunt reactor at receiving end
 shunt resistance at receiving end
All of these

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Power Systems
Reheat cycle in thermal power plant is used to

  increase thermal efficiency.
 reduce loss of heat.
 improve condenser performance.
 utilize heat of flue gases.

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

 any of the above
 average
 maximum
 RMS

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