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Fuels and Combustion

Fuels and Combustion
High pressure coal gasification is employed in __________ process.

Lurgi
Kopper-Totzek
Winkler
None of these

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Fuels and Combustion
Coking coals are invariably

Anthracites
Lignites
Semi-anthracites
Bituminous coals

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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.

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

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Fuels and Combustion
The gasification reaction represented by, C + H₂O = CO + H₂, is

Exothermic
Autocatalytic
Catalytic
Endothermic

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

Domestic ovens
Cupola in foundaries
Iron blast furnace
Sinter making

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Fuels and Combustion
Low temperature oxidation and spontaneous combustion of freshly mined coal is accentuated, if

Smaller fines are stored in large quantity
All of these
It contains large amount of volatile matter
It is stored in tall heaps

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