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Fuels and Combustion

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

Nuclear fusion
Nuclear fission
All of these
Combustion

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Fuels and Combustion
Coke made in narrower by-product coke ovens (as compared to wider ovens) is

Less reactive
All of these
Smaller in size
Stronger

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Fuels and Combustion
Which is the heaviest fuel gas out of the following?

Carburetted water gas
Water gas
Coke oven gas
Blast furnace gas

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Fuels and Combustion
Which of the following has the highest heat of combustion?

CH₄
H₂
CO
C₂H₆

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Fuels and Combustion
Which of the following has the highest gross calorific value?

Oil refinery gas
Carburetted water gas
Blast furnace gas
Coke oven gas

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Fuels and Combustion
As the equilibrium moisture content of the coal increases, its

Swelling number decreases
Bulk density decreases
Calorific value increases
Swelling number increases

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