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FUELS AND COMBUSTION

Fuels and Combustion
The maximum adiabatic flame temperature in air is __________ the maximum flame temperature in pure oxygen.

Not related to
Higher than
Lower than
Same as

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

CO₂
CH₄
H₂
NH₃

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Fuels and Combustion
Blast furnace gas burns with a bluish flame, because of the presence of

CO₂
CO
CH₄
S

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Fuels and Combustion
With increase in C/H ratio of a fuel, the amount of CO₂ formed on its complete combustion

Decreases
Remains same
Increases
Either A or B, depends on other factors

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Fuels and Combustion
Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent.

In between 37 & 71%
None of these
< 37%
>71%

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