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Power Systems

Power Systems
A gas turbine power plant is best suited for

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

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Power Systems
The essential requirement(s) for power plants to be operated as peak load plants are

All of these
 Capability of quick starts.
 Low capital cost.
 Quick response to load variation.

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Power Systems
A transmission line has self and mutual impedances are 0.8 and 0 pu respectively. Find the positive, negative and zero sequence impedances respectively?

 0.6, 0.8 and 1.2 pu
 0.8, 0.8 and 0.8 pu
 0.6, 0.6 and 1.2 pu
 0.6, 0.6 and 0.6 pu

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Power Systems
A string type insulator has three units with self capacitance C and ground capacitance of 0.2 C having a string efficiency of

 78%
 82%
 76%
 80%

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Power Systems
The presence of earth in case of overhead lines

 decrease capacitance
 increase capacitance
 increase inductance
 decrease inducatance

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Power Systems
A sort line with R/X ratio 1, the zero regulation is obtained when the power factor of the load is

 0.707 leading
 unity
 0 leading
 0.5

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