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Power Systems

Power Systems
Condition for zero voltage regulation is

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

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Power Systems
Range of accelerating factor is

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

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Power Systems
A transmission line has 200 km operating at frequency of 10 Hz Hz. Find the type of the line

 long transmission line
 any of the above
 short transmission line
 medium transmission line

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Power Systems
If the time of operation of a relay for unity TMS is 10 sec. the time of operation of 0.5 TMS will be _______________ secs.

  5.
 20.
 3.
 7.

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Power Systems
If we increase the spacing between the phase conductors, the value of line inductance

 increase
None of these
 remains unaffected
 decrease

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Power Systems
Under excited Synchronous phase modifier works as

 shunt reactor
 series capacitor
 any of the above
 shunt capacitor

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