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Power Systems

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

 power factor
 reactive power
 voltage
 current

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

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

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Power Systems
The essential requirement(s) for power plants to be operated as peak load plants are

 Capability of quick starts.
All of these
 Quick response to load variation.
 Low capital cost.

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Power Systems
Isolator in sub station is open under ------------- condition?

 no load
 short circuit
 any of the above
 full load

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Power Systems
By using guard ring in a transmission line, its string efficiency

None of these
 remains unaffected
 increase
 decrease

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Power Systems
A 3-phase transmission line has its conductors at the corners of an equilateral triangle with side 3m. The diameter of each conductor is 1.63 cm. The inductance of the line per phase per km is

 1.182 mH
 1.043 mH
 1.232 mH
 1.093 mH

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