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Fuels and Combustion

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

CO₂
CO
CH₄
H₂O

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Fuels and Combustion
Oxygen required for theoretically complete combustion of 1 Nm³ methane is __________ Nm³.

2
1
6
4

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Fuels and Combustion
Washing of coal does not reduce its

None of these
Fusion point of ash
Heating value
S & P content

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Fuels and Combustion
A fuel with high heat release rate will

Require smaller combustion chamber
Have high adiabatic flame temperature
Have high calorific value
None of these

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Fuels and Combustion
Caking index of a coal is a measure of its

Porosity
Reactivity
Abradability
Agglutinating (binding) properties

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Fuels and Combustion
Combustion of pulverised coal compared to the lumpy coal

Provides better control of furnace temperature
Provides higher thermal efficiency & flame temperature
All of these
Facilitates combustion with lower excess air

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