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Fuels and Combustion

Fuels and Combustion
Fusion point of coal ash increases with increase in its __________ content.

Iron silicate
All of these
Iron sulphate
Lime and magnesia

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Fuels and Combustion
Ignition temperature of a fuel in air is __________ that in pure oxygen.

Either more or less; depends on the type of fuel
Less than
Equal to
More than

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Fuels and Combustion
For maximum discharge through a chimney, its height should be

200 meters
Equal to the height of the hot gas column producing draught
Infinitely long
More than 105.7 metres

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Fuels and Combustion
__________ process is meant for direct hydrogenation of coal to produce liquid fuel.

None of these
Fischer-Tropsch
Lurgi
Bergius

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Fuels and Combustion
Gobar gas is produced by the __________ of 'gobar' (cow dung).

Dehydration
Fermentation
Oxidation
Hydrolysis

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Fuels and Combustion
Largest constituent of blast furnace gas is

CO
CO₂
N₂
H₂

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