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Generation of Electrical Energy

Generation of Electrical Energy
Which of the following material is used as a moderator in nuclear power plant?

Boron
Calcium
Graphite
Plutonium

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Generation of Electrical Energy
The function of a moderator in a nuclear reactor is

To speed up the slow moving electrons
To start the chain reaction
To transfer heat produced inside the reactor to a heat exchanger
To slow down the fast moving electrons

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Generation of Electrical Energy
The efficiency of a modern boiler using coal and heat recovery equipment is about

85 to 90%
65 to 70%
25 to 30%
40 to 50%

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Generation of Electrical Energy
Economiser improve the boiler efficiency by

10 to 12 %
4 to 10%
13 to 15 %
1 to 5 %

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Generation of Electrical Energy
For the induced draught the fan is located

at the top of the chimney
near bottom of chimney
near bottom of furnace
anywhere permissible

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Generation of Electrical Energy
Which of the following coals has the highest calorific value?

Peat
Bituminous
Lignite
Anthracite coal

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