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Power Systems

Power Systems
Normally Z bus matrix is a

 full matrix
 null matrix
 unit matrix
 sparse matrix

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Power Systems
The insulation resistance of the 20 km long underground cable is 8 MΩ. Other things being same, the insulation resistance of 10 km long cable will be

 8 MΩ
 4 MΩ
 16 MΩ
 32 MΩ

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Power Systems
The rate of rise of re-striking voltage is dependent upon

 both 1 and 2
 capacitance of the system only
 inductance of the system only
 resistance of the system only

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Power Systems
A transmission line is compensated with shunt capacitance Csh. If the uncompensated transmission line surge impedance is Zs, then find the new surge impedance Zn after shunt compensation?

 Zs/√(1 + Kcsh)
 Zs*√(1 + Kcsh)
 √(1 + Kcsh)/Zs
All of these

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Power Systems
Which of the following are the fissile materials

 U235 and Th239.
 U238 and Th232.
  None of these.
 U235, U233 and Pu239.

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Power Systems
The ABCD constants of a 3-phase transmission line are A = D = 0.8∠1°, B = 170∠85° Ω , C = 0.002∠90.4° â„§. The sending end voltage is 400 kV. The receiving end voltage under no load condition is

 600 kV
 400 kV
 350 kV
 500 kV

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