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Fuels and Combustion

Fuels and Combustion
Producer gas comprises mainly of

CO & N₂
CO & H₂
CO₂ & N₂
CO₂ & H₂

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Fuels and Combustion
Power alcohol as compared to straight run gasoline has lower

Octane number
Calorific value
Specific gravity
Viscosity

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Fuels and Combustion
Preheating of coal charge for the coke ovens reduces the

Fuel consumption in coking
Yield of gas and tar
Time of carbonisation
All of these

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Fuels and Combustion
Abrasion index of blast furnace coke should be around __________ percent.

80
55
20
35

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Fuels and Combustion
Mineral matter, 'M' and ash percentage 'A' in coal are roughly related as

M = 1.8 A
M = 1.1 A
M = 0.5 A
M = A

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Fuels and Combustion
Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent.

>71%
None of these
In between 37 & 71%
< 37%

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