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Fuels and Combustion

Fuels and Combustion
Bomb calorimeter can be used to determine the __________ of the coal.

Sulphur content
Calorific value
Both A & B
Neither A nor B

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Fuels and Combustion
During combustion of gaseous fuels, deficiency of air

Lengthens the flame
Tends to shorten the flame
Does not affect the flame length
Increases the flame temperature

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Fuels and Combustion
Pick the odd man out.

Wood
Oil gas
Briquettes
Pitch creosote mixture

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Fuels and Combustion
Laboratory gas is obtained by the cracking of

Gasoline
Diesel
Fuel oil
Kerosene

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Fuels and Combustion
High ash containing coke

None of these
Has poor strength and abrasion resistance
Is desirable in producer gas manufacture
Produces more slag when used in the blast furnace

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Fuels and Combustion
The calorific value of a gas of composition CO₂ = 20%, H₂ = 50%, CH₄ = 30%, is y. If the composition of gas is changed to H₂ = 50%, CH₄ = 30%, CO₂ = 10%, N₂ = 10%, then the calorifice value will be

Y
1.05 y
0.95 y
1.8 y

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