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Power Systems

Power Systems
Which of the following relationships are not valid for short transmission lines

 Is = Ir
 A = D = 1
 B = C = Z
All of these

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

 peak value
 average
 RMS
 any of the above

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Power Systems
Critical visual voltage is the voltage at which

 corona is visible with blue or violet colour
 both 1 and 2
 corona is just initiated
None of these

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Power Systems
Which of following materials can be used as coolant

  Any of above.
 CO2.
 Heavy water.
 Helium.

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Power Systems
A 3 layer and diameter of each strand is d, then find the total diameter of ACSR conductor?

 3d
 5d
 d
 2d

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Power Systems
The per unit value of a 2 ohm resistor at 100 MVA and 10 kV base voltage is

 2 pu
 0.5 pu
 4 pu
 0.2 pu

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