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Power Systems

Power Systems
A gas turbine power plant is best suited for

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

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Power Systems
Condition for zero voltage regulation is

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

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Power Systems
If R = 84 ohm/Km, G = 10-6 mho/Km, H = 0.01 H/Km, C = 0.061 μ F/Km and frequency = 1000 Hz, then what is the value of propagation constant of the transmission line

 0.09 + j 0.018 per Km.
 0.01 + j 0.02 per Km.
 0.018 per Km.
 None of them.

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Power Systems
A coal fired steam power station working at a plant factor of 80% has one 500 MW generating unit. If the heat content of coal is 2 kWh/kg, the overall plant efficiency is 40% and a train load of coal is 2000 metric tons, then the number of trains required daily for the plant is

 16
 2
 10
 6

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Power Systems
Galvanised steel is generally used as

 earth wire.
All of these
 structural components.
 stray wire.

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Power Systems
A transmission line has an impedance of (2+j6) Ω has voltage regulation of 10% at a load power factor of 0.8 lag. Find the voltage regulation for a load of 0.6 lead

 6.92%
 -6.92%
 10%
 -10%

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