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Fuels and Combustion

Fuels and Combustion
'Fuel' can be defined as a substance which produces heat by

Nuclear fission
Combustion
Nuclear fusion
All of these

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Fuels and Combustion
Preheating of a gaseous fuel results in increased

Flame temperature
Quantity of flue gas
Flame length
Ignition temperature

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Fuels and Combustion
Benzene is used

For making insecticides (e.g., DDT, BHC etc.), detergent & rubber (SBR)
As a motor fuel
As a perfume
As an explosive

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Fuels and Combustion
Caking index of coal blend used for blast furnace coke making is about

36
22
8
12

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Fuels and Combustion
In high temperature carbonisation (as compared to low temperature carbonisation) of coal, the

Ignition temperature of coke produced is less
Gas yield is less
Aromatic content of tar produced is more
Tar yield is more

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Fuels and Combustion
Presence of free moisture in coal is most disadvantageous during

Handling (e.g. when emptying wagons)
Its pulverisation (as it requires more power)
Combustion of fire slacks on the grates
None of these

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MORE MCQ ON Fuels and Combustion

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