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Fuels and Combustion

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

Oxidation
Dehydration
Hydrolysis
Fermentation

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Fuels and Combustion
Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around __________ Nm³.

30
300
3000
30, 000

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Fuels and Combustion
High sulphur content in a fuel __________ of the flue gases.

Increases the dew point
Decreases the dew point
Both B & C
Reduces the combustion efficiency by limiting the permissible temperature reduction

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Fuels and Combustion
Which of the following coal gasification processes will produce gas having maximum methane content?

Winkler process
All of these
Lurgi process
Kopper-Totzek process

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Fuels and Combustion
A coal that softens and fuses on heating is

Non-caking
Classified
Carbonised
Caking

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Fuels and Combustion
Which of the following fuel gases is heavier than air?

Blast furnace gas
Natural gas
Coke oven gas
Water gas

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