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Power Systems

Power Systems
A gas turbine power plant is best suited for

 None of these.
 Peak load.
 Base load.
 Emergency.

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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
 reduction of KVA rating of distribution transformers
All of these
 reduction in distribution power loss

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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

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

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Power Systems
A three phase, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 secs. The symmetrical breaking current is

 50 kA.
 55 kA.
  35 kA.
 45 kA.

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Power Systems
Condition for zero voltage regulation is

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

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Power Systems
Due to proximity effect, the increase in conductor resistance is not negligible in

 communication lines
All of these
 overhead transmission lines
 underground cable

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