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Power Systems

Power Systems
Operating time of pumped storage plant is

 high
 can't say
 very high
 low

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Power Systems
If a generator of 250 MVA rating has an inertia constant of 6 MJ/MVA, its inertia constant on 100 MVA base is

 15 MJ/MVA
 6 MJ/MVA
 10.5 MJ/MVA
 2.5 MJ/MVA

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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

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

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Power Systems
In a regenerative cycle, feed water is heated by

 heaters.
  drained steam from turbine.
 all of above.
 exhaust gas.

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Power Systems
What is the function of economiser in steam boilers

All of these
 cooling
 collect ash particals
 improving thermal efficiency

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Power Systems
On which one of the following cycles does a modern steam power plant work?

 Otto cycle
 Carnot cycle
 Bell-Coleman cycle
 Rankine cycle

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