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Fuels and Combustion

Fuels and Combustion
Air/gas ratio for complete combustion will be the highest for

Gobar gas
Carburetted water gas
LPG
Coke oven gas

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

Hardness
None of these
Strength
Reactivity

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Fuels and Combustion
Gobar gas constitutes mainly of

CO & N₂
CO & CO₂
CH₄ & CO₂
CH₄ & N₂

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Fuels and Combustion
The calorific value of 'LPG' (50% propane + 50% butane) is about __________ kcal/Nm³.

5000
10, 000
25, 000
15, 000

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Fuels and Combustion
Hard coke is manufactured from

Anthracite
Lignite
Bituminous coal
Semi-anthracite

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Fuels and Combustion
As the equilibrium moisture content of the coal increases, its

Swelling number decreases
Swelling number increases
Calorific value increases
Bulk density decreases

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