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Power Systems

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

 P and V
 P and Q
 V and δ
 δ and Q

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Power Systems
The conductor of a 10 Km long single phase, two wire line are separated by a distance of 1.5 m the diameter of each conductor the inductance of the circuit is

 23.33 mH.
 21.2 mH.
 25.8 mH.
  23.8 mH.

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Power Systems
For a 500 Hz frequency excitation, a 100 km long power line will be modelled as

 long transmission line
 shunt capacitor
 any of the above
 medium transmission line

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Power Systems
Maximum efficiency of modern coal fired steam raising thermal power plants is restricted to about 035 (a low value), mainly because of

 low steam turbine mechanical efficiency.
 high energy loss in boiler.
  high energy loss from turbine exhaust to condenser.
 low alternative efficiency.

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Power Systems
The thermal efficiency of BWR is

None of these
 greater than that of PWR.
  equal to that of PWR.
 less than that of PWR.

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Power Systems
Installation of capacitors at suitable locations and of optimum size in a distribution system results in

 improved voltage regulation
All of these
 reduction of KVA rating of distribution transformers
 reduction in distribution power loss

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