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Power Systems

Power Systems
For load flow studies, What are the quantities specified at load bus are

 δ and Q
 P and V
 P and Q
 V and δ

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Power Systems
IF the time of operation of a relay for unity TMS is 10 sec then the time of operation for 0.5 TMS is

 10 sec.
 20 sec.
 none of these.
  5 sec.

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Power Systems
Oxide film arrestor has which of the following properties?

 Does not require daily charging.
 Both A and B.
 It is expensive.
 Installed at points of transmission line where daily visit is difficult.

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Power Systems
The flow duration curve at a given head of a hydroelectric plant is used to determine

 diversity factor for the plant.
  total power available at the site.
 load factory at the plant.
 total units of energy available.

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Power Systems
For symmetrical network, the neutral current is

 any of the above
 zero
 infinity
 maximum

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Power Systems
If the frequency is increased, then skin effect will

 decreases
 remains unaffected
 increases
 any of the above

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