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Fuels and Combustion

Fuels and Combustion
Gas yield in the Kopper-Totzek coal gasifier is about __________ Nm³/ton coal (ash = 35%).

5000
3500
150
1500

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

Hydrolysis
Dehydration
Fermentation
Oxidation

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Fuels and Combustion
During its calorific value determination by bomb calorimeter, coal is combusted by

Oxygen
Oxygen enriched air
Air
None of these

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

25
75
50
10

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Fuels and Combustion
Main use of hard coke produced by high temperature carbonisation is in the

Sinter making
Iron blast furnace
Cupola in foundaries
Domestic ovens

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

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

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