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Fuels and Combustion

Fuels and Combustion
L.D. converter gas (produced in steel plant) comprises mainly of

CO (upto 65%) & CO₂
CO & O₂
CO₂ & H₂
CO₂ & O₂

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Fuels and Combustion
Number of macrocomponents present in coal according to Stopes are

Four
Six
Five
Two

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Fuels and Combustion
The sequence of absorption in flue gas analysis by Orsat's apparatus is respectively

CO₂, O₂, CO
CO, O₂, CO₂
CO₂, CO, O₂
O₂, CO₂, CO

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Fuels and Combustion
Coke oven gas after passing through return electrostatic tar precipitator (RETP) is used for the

Mixing with blast furnace gas
Coke oven battery heating
Steel ladle drying
Hot scarfing of steel slabs

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

75
15 to 25
35 to 45
55 to 75

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Fuels and Combustion
Removal of hydrogen from coke oven gas

Decreases its calorific value
Is not possible on commerical scale
Does not alter its calorific value
Increases its calorific value

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