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Fuels and Combustion

Fuels and Combustion
Which of the following can be made into briquettes without the use of a binder?

Bituminous coal
Anthracite coal
Lignite
None of these

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

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

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

Vitrain
Fussain
Durain
Clarain

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

C₂H₆
CO
H₂
CH₄

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Fuels and Combustion
Ash content in the middling coal (a byproduct of coal washeries) in India ranges between __________ percent.

75
35 to 45
55 to 75
15 to 25

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Fuels and Combustion
The gasification reaction represented by, C + H₂O = CO + H₂, is

Autocatalytic
Exothermic
Endothermic
Catalytic

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