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Fuels and Combustion

Fuels and Combustion
The hottest part of the flame lies in its____zone.

Yellow
Luminous
Non-luminous
Unburnt gases

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Fuels and Combustion
Percentage of hydrogen in coke oven gas may be around

45
25
60
10

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Fuels and Combustion
Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the

Solvent recovery from air and gases
Decolourisation of sugar
Absorption of gases and vapor
Electrode manufacture

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Fuels and Combustion
Fuel consumption in coke making can be reduced by

Dry quenching of coke
Preheating, blending and de-ashing the coal
Stamped charging of coal
All of these

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Fuels and Combustion
The cooling medium used in dry quenching of coke is

Carbon dioxide
Phenolic water
Air
Nitrogen

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Fuels and Combustion
A particular coal is said to be free burning when it

Gives smokeless burning
Shows little or no fusing action
Burns completely
None of these

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