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Fuels and Combustion

Fuels and Combustion
The pyragallol solution used in orsat apparatus can absorb

Only O₂
Both O₂ and CO₂
Both O₂ and CO
All of these

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Fuels and Combustion
With increases in carbonisation temperature

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

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Fuels and Combustion
Too much of excess air in combustion results in high

Percentage of oxygen in flue gases
Fuel consumption for the same heat load
All of these
Stack gas temperature

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Fuels and Combustion
Producer gas comprises mainly of

CO₂ & H₂
CO & N₂
CO₂ & N₂
CO & H₂

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

H₂
CO
CH₄
C₂H₆

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Fuels and Combustion
One kg of carbon for theoretically complete combustion requires __________ kg of air.

12
11.5
0.5
23

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