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Fuels and Combustion

Fuels and Combustion
Calorific value of wood gas is about __________ kcal/Nm³.

5400
8500
1500
3300

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Fuels and Combustion
Undercharging of coal in the by-product coke ovens results in

No change in the c.v. of coke oven gas
Increase in its throughput
Increase in the c.v. of coke oven gas
Decrease in the c.v. of coke oven gas

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Fuels and Combustion
Largest constituent of blast furnace gas is

CO₂
CO
H₂
N₂

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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
Either A or B, depends on other factors
Increases

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Fuels and Combustion
A coal that softens and fuses on heating is

Classified
Caking
Non-caking
Carbonised

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Fuels and Combustion
Catalyst used in Fischer-Tropsch process is

Alumina
Zinc oxide
Nickel
Thorium oxide

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