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Fuels and Combustion

Fuels and Combustion
By-products are __________ recovered in 'Beehive ovens'.

Not at all
Fully
Negligibly
Partially

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Fuels and Combustion
With increases in carbonisation temperature

Methane percentage in the coke oven gas increases
Coke even gas yield increases
Tar yield increases
Hydrogen percentage in the coke oven gas decreases

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Fuels and Combustion
'Fat coals' are those coals which have very high

Fusion point of its ash
Caking capacity
Inherent moisture content
Volatile matter content

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Fuels and Combustion
Largest constituent of coke oven gas is

N₂
CH₄
H₂
CO₂

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Fuels and Combustion
Use of excess of combustion air in the combustion of fuels results in

Heat losses
None of these
Condensation of water vapour from the fuel gas
Long flame

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Fuels and Combustion
Which of the following reactions occuring during coal gasification is called the Neumann reversal reaction?

C + H₂O ⟷ CO + H₂
C + 2H₂O ⟷ CO₂ + 2H₂
2CO ⟷ C + CO₂
CO + H₂O ⟷ CO₂ + H₂

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