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Power Systems

Power Systems
Condition for zero voltage regulation is

 cosφ = R/X
 cosφ = X/R
 tanφ = X/R
 tanφ = R/X

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

 α²
 α
 0
 1

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Power Systems
A penstock is used as a condition between

 the turbine and discharge drain.
  the dam and the turbine in a hydro station.
 the heat ex-changer and the turbine in nuclear power plant.
 none of above.

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Power Systems
Earthing switch is used for

 measuring of safety voltage
 discharging residual energies
 protection of equipment from ground faults
All of these

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Power Systems
Find the propagation constant, if impedance is 10Ω and admittance is 10 â„§?

 5
 10
 1
 100

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Power Systems
In a 400 KV network, 360 KV is recorded at a 400 KV bus. The reactive power absorbed by shunt rated for 50 MVAr, 400 KV connected at the bus is

 55.56 MVAr.
  40.5 MVAr.
 61.73 MVAr.
 45 MVAr.

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