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Fuels and Combustion

Fuels and Combustion
Main component of sewage gas produced during aneorobic decomposition of organic waste (by suitable bacteria) during sewage disposal is

N₂
CO₂
H₂
CH₄

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Fuels and Combustion
About __________ Nm³ of air will be required for the complete combustion of 2Nm³ of CO.

3
5
1
2

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Fuels and Combustion
Light oil whose major component is benzol, is obtained by the distillation of crude tar in the temperature range of __________ °C.

200-300
280-300
80-170
250-270

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Fuels and Combustion
Coke oven gas is stripped of its H₂S and mercaptans content by

Bubbling it through dilute sulphuric acid
Adsorption on silica gel
Absorption in wash oil
Adsorption on bog iron bed

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Fuels and Combustion
Percentage of nitrogen in blast furnace gas may be around

55
25
80
5

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Fuels and Combustion
Soft coke is not

A domestic fuel
None of these
Produced by low temperature carbonisation of coal
Used in blast furnaces

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