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Fuels and Combustion

Fuels and Combustion
The bright glow of a combustion process is the characteristic of __________ temperature oxidation of coal.

Slow & low
Fast & high
Fast & slow
Slow & high

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Fuels and Combustion
By-products recovery process from coal carbonisation is termed as direct, indirect and semi direct process depending upon the method of recovery of

Tar
Benzol
None of these
Ammonia

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Fuels and Combustion
__________ process is meant for direct hydrogenation of coal to produce liquid fuel.

Fischer-Tropsch
Bergius
None of these
Lurgi

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

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

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Fuels and Combustion
Coke oven gas constitutes mainly of

CH₄ & CO
H₂ & CO
H₂ & CH₄
H₂ & CO₂

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Fuels and Combustion
Mineral matter, 'M' and ash percentage 'A' in coal are roughly related as

M = 1.1 A
M = 1.8 A
M = 0.5 A
M = A

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