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Fuels and Combustion

Fuels and Combustion
Calorific value of of blast furnace gas is around __________ KCal/Nm³.

850
6500
1800
4200

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Fuels and Combustion
Critical Air Blast (CAB) value of coke is a direct measure of its

None of these
Strength
Hardness
Reactivity

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Fuels and Combustion
Yield of coke oven gas in low temperature carbonisation of coal is about __________ Nm³ /ton of dry coal.

160
750
500
60

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Fuels and Combustion
Largest constituent of coke oven gas is

N₂
H₂
CO₂
CH₄

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

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

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Fuels and Combustion
With increase in C/H ratio of a fuel, the dew point of flue gases

May increase or decrease ; depends on the type of fuel
Increases
Decreases
Remains same

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