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Power Systems

Power Systems
For load flow studies, What are the quantities specified at load bus are

 V and δ
 P and V
 δ and Q
 P and Q

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Power Systems
Telecommunication lines are transposed to reduce the

 voltage level
 efficiency
 radio interference in communication lines
All of these

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Power Systems
A string type insulator has three units with self capacitance C and ground capacitance of 0.2 C having a string efficiency of

 82%
 80%
 76%
 78%

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Power Systems
Equal area criterion gives the information regarding

 absolute stability
 relative stability
 stability region
 swing curves

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Power Systems
Condition for zero voltage regulation is

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

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Power Systems
Length of short transmission line is up to

 150 km
 80 km
 40 km
 any of the above

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