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Fuels and Combustion

Fuels and Combustion
Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal?

Clarain
Durain
Vitrain
Fussain

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Fuels and Combustion
Compound coke ovens are those which can be heated by

Both steam and electrical power
Rich gas (e.g., coke oven gas)
Both B and C
Lean gas (e.g., B.F. gas)

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Fuels and Combustion
Ignition temperature of a fuel in air is __________ that in pure oxygen.

More than
Equal to
Either more or less; depends on the type of fuel
Less than

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Fuels and Combustion
Coke oven gas burns with an yellowish flame, because of the presence of

CO₂
H₂
CH₄
NH₃

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Fuels and Combustion
Coal tar (produced by high temperature carbonisation) is the main source of

Paraffins
Olefins
Alphatic compounds
Aromatic compounds

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Fuels and Combustion
Main component of sewage gas produced during aneorobic decomposition of organic waste (by suitable bacteria) during sewage disposal is

CO₂
N₂
CH₄
H₂

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