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Power Systems

Power Systems
In which of the following given faults, all the sequence currents are equal?

 LLL
 LG
 LLG
 LL

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Power Systems
Which of the following is/are the effects of corona

 interference decreases
 charging current increases
 power loss decreases
All of these

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Power Systems
A 3-phase transmission line operating at Vs = 400 kV and has ABCD parameters A= D = 0.8∠0°, B = 100∠90° Ω, C = 0.5*10^-6∠90° â„§. Find the shunt reactor required for compensating ferranti effect?

 500 Ω
 3000 Ω
 2000 Ω
 1500 Ω

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Power Systems
The function of reflector is to

  bounce back most of the neutrons that escape from the fuel core.
 none of above.
 stop the chain reaction.
 reduce the speed of the neutrons.

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Power Systems
What is the correct expression for the electrical power developed by

 75 × 0.736 × WQHη.
 ( 7 / 75 ) × WQHη.
 ( 75 / 0.736 ) × WQHη.
  ( 0.763 / 75 ) × WQHη.

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Power Systems
Reflection coefficient of voltage is Rv

 2Zs/(Zs + Zl)
 (Zs - Zl)/(Zs + Zl)
 2Zl/(Zs + Zl)
 (Zl - Zs)/(Zs + Zl)

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