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Fuels and Combustion

Fuels and Combustion
Coke oven gas compared to blast furnace gas is

Lighter
All of these
More explosive and inflammable
Less poisonous

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Fuels and Combustion
Use of excess of combustion air in the combustion of fuels results in

Heat losses
Long flame
None of these
Condensation of water vapour from the fuel gas

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

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

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Fuels and Combustion
Gobar gas is produced by the __________ of cown dung.

Oxidation
None of these
Hydrogenation
Fermentation

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Fuels and Combustion
In flue gas analysis by Orsat's apparatus, carbon dioxide is absorbed by

Potassium hydroxide
Dilute potassium carbonate
Alkaline pyragllol solution
Cuporus chloride

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Fuels and Combustion
Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C.

400-500
1400-1500
1700-1800
900-1000

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