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FUELS AND COMBUSTION

Fuels and Combustion
Ignition temperature decreases progressively from anthracite to lignite, because

Ash content increases
Volatile matter content increases
Carbon content decreases
Moisture content increases

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Fuels and Combustion
Blast furnace gas is a very poisonous gas because of its predominantly high __________ content.

H₂O
CO₂
CH₄
CO

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Fuels and Combustion
The maximum adiabatic flame temperature in air as compared to that in pure oxygen is

Much higher
Much lower
Either lower or higher, depends on the type of fuel
Same

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Fuels and Combustion
Coke made in narrower by-product coke ovens (as compared to wider ovens) is

All of these
Smaller in size
Less reactive
Stronger

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Fuels and Combustion
Ammonia content in raw coke oven gas is about __________ gm/Nm³.

15
1
50
100

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