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Power Systems

Power Systems
What should be the minimum depth (in metre)of cable trench to dug for laying of 1.1 kV?

 0.90.
  0.75.
 1.05.
 1.20.

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

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

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Power Systems
If sag in an overhead line increase, tension in the line

 decrease
 remains same
None of these
 increase

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Power Systems
Specified quantities of load bus are

 Q and V
 P and Q
 V and δ
 P and δ

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Power Systems
In relay coil which is used?

  Potential transformer.
  Current transformer.
  Instrument transformer.
  Power transformer.

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Power Systems
A transmission line has a surge impedance of 400 Ω is connected with the cable having surge impedance of 40 Ω, a surge magnitude of 100 kV is travelling from the transmission line towards the cable. Find the incident current?

 2500 A
 250 A
 100 A
 200 A

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