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Fuels and Combustion

Fuels and Combustion
Most of the coking coals are

Bituminous
Anthracite
None of these
Lignite

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Fuels and Combustion
Coking coals are invariably

Anthracites
Lignites
Bituminous coals
Semi-anthracites

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Fuels and Combustion
Supply of excess air for complete combustion of fuel is necessitated to facilitate

Its thorough mixing with air
Attainment of high temperature
None of these
Attainment of chemical equilibrium

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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.

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

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Fuels and Combustion
Which adsorbant is used for removing sulphur compounds (S Q, H₂S, RSH etc.) removal from coke oven gas in by-products recovery plant ?

Basalt
Diatomaceous earth
Bog iron (i.e., moist ferric hydroxide)
Silica gel

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Fuels and Combustion
During combustion of a gaseous fuel, the presence of a non-luminous flame is an indication of the

Complete combustion
None of these
High oxygen in flue gas
Incomplete combustion

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