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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

CO₂
N₂
H₂
CH₄

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Fuels and Combustion
The temperature at which plastic layer formation takes place during carbonisation of coal varies from __________ °C.

550 to 650
350 to 450
100 to 150
700 to 850

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Fuels and Combustion
In flue gas analysis by Orsat's apparatus, oxygen is absorbed by

Alkaline pyragllol solution
Cuprous chloride
None of these
Potassium hydroxide

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Fuels and Combustion
High excess air in combustion of fuels results in

None of these
Increased fuel consumption
Incomplete combustion
Smoky flame

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Fuels and Combustion
Caking coal is desirable for

Burning on travelling grate
All of these
Coke making
Burning on firebars

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Fuels and Combustion
L.D. converter gas (produced in steel plant) comprises mainly of

CO & O₂
CO₂ & H₂
CO₂ & O₂
CO (upto 65%) & CO₂

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