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POWER SYSTEMS

Power Systems
Advantages of pumped storage plants is/are

 most economical as a peak load supply plant
 used as load frequency control
All of these
 operating time is minimum

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Power Systems
Which of the following materials is/are used as moderators?

 heavy water
All of these
 graphite
 beryllium

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Power Systems
In nuclear power plants which material is/are used as coolant?

 beryllium
All of these
 liquid sodium
 graphite

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Power Systems
One million cubic meters of water is stored in a reservoir feeding a water turbine. The density of water is 993 kg/m³. If the centre of mass of water is 50 meters above the turbine and losses are negligible, the energy produced by that volume of water is

 135.3 MWhr
 130.2 MWhr
 140 MWhr
 120 MWhr

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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

 2
 10
 16
 6

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