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Fuels and Combustion

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

Hydrolysis
Fermentation
Dehydration
Oxidation

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Fuels and Combustion
Main component of sewage gas produced during aneorobic decomposition of organic waste (by suitable bacteria) during sewage disposal is

H₂
N₂
CH₄
CO₂

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Fuels and Combustion
Which will have the least volatile matter and hence will be the most difficult to ignite?

Bituminous coal
Semi-bituminous coal
Coke
Aanthracite

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Fuels and Combustion
With increases in carbonisation temperature

Tar yield increases
Coke even gas yield increases
Hydrogen percentage in the coke oven gas decreases
Methane percentage in the coke oven gas increases

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Fuels and Combustion
Yield of charcoal in high temperature carbonisation of wood is about __________ percent.

75
50
10
25

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Fuels and Combustion
Coals used for the generation of producer gas should have

High volatile matter content
High caking index
Very low ash content (8-10%)
Low fusion point of ash

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