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Fuels and Combustion

Fuels and Combustion
Coke made in narrower by-product coke ovens (as compared to wider ovens) is

Smaller in size
All of these
Less reactive
Stronger

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Fuels and Combustion
Main constituents of purified Lurgi gas are

N₂, H₂ & CO₂
CO₂, O₂ & CO
CO, H₂ & CH₄
H₂, CmHn & CO₂

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Fuels and Combustion
Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300° ) may be reduced by about __________ percent as compared to the use of atmospheric combustion air.

5
20
35
10

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Fuels and Combustion
Low temperature oxidation of stored coal results in the

All of these
Increase in its oxygen content
Decrease in its carbon & hydrogen content
Decrease in its caking power & calorific value

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Fuels and Combustion
__________ present in coal is not determined in its ultimate analysis.

Hydrogen
Total carbon
Fixed carbon
Nitrogen

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Fuels and Combustion
In Orsat's apparatus, ammoniacal cuprous chloride is used for selectivity absorbing

O₂
H₂O
CO₂
CO

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