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Power Systems

Power Systems
If the time of operation of a relay for unity TMS is 10 sec. the time of operation of 0.5 TMS will be _______________ secs.

  5.
 20.
 7.
 3.

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Power Systems
In a regenerative cycle, feed water is heated by

 exhaust gas.
  drained steam from turbine.
 all of above.
 heaters.

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Power Systems
Find the value of a729, where "a" is the operator

 α²
 1
 α
 0

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Power Systems
Fault calculations using computer are usually done by

 Y bus method
 either 1 or 2
 Z bus method
None of these

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Power Systems
Corona loss is ----------------- on hilly areas than as plain areas.

None of these
 remain same
 more
 less

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

 LLG
 LL
 LG
 LLL

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