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Power Systems

Power Systems
The insulator thickness on the conductor, in cables depends upon

 reactive power
 current
 power factor
 voltage

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Power Systems
Condition for zero voltage regulation is

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

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Power Systems
A transmission line has an impedance of (2+j6) Ω has voltage regulation of 10% at a load power factor of 0.8 lag. Find the voltage regulation for a load of 0.6 lead

 -6.92%
 -10%
 6.92%
 10%

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Power Systems
Specified quantities of load bus are

 Q and V
 V and δ
 P and Q
 P and δ

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Power Systems
Normally Z bus matrix is a

 full matrix
 sparse matrix
 unit matrix
 null matrix

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Power Systems
Two generating stations delivering a powers of P1 = 150 MW, P2 =100 MW and the B coefficients are B11 = 0.005, B22 = 0.002, B12=B21= -0.001. Find the transmission line losses?

 85.5
 95.5
 102.5
 105.2

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