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Fuels and Combustion

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
The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to

Minimise its corrosion
Avoid radiation heat loss
None of these
Make it look attractive

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

Catalytic
Autocatalytic
Endothermic
Exothermic

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Fuels and Combustion
Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about __________ percent.

5
75
25
55

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Fuels and Combustion
Coal tar (produced by high temperature carbonisation) is the main source of

Paraffins
Aromatic compounds
Alphatic compounds
Olefins

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Fuels and Combustion
Spontaneous combustion of coal on storage results due to

Storage in large heaps with small surface to volume ratio
All of these
Inadequate ventilation
Low temperature oxidation

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