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Fuels and Combustion

Fuels and Combustion
If CO₂ is not fully absorbed by the KOH solution meant for its absorption in the orsat apparatus, it will appear as

O₂
CO
N₂
SO₂

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Fuels and Combustion
Higher percentage of ash in coal meant for the production of metallurgical grade coke

None of these
Causes brittleness in steel
Decreases the abrasion resistance of coke
Decreases the hardness of coke

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Fuels and Combustion
A coal having higher volatile matter content, has lower

Smoking tendency on burning
Coke oven gas yield on carbonisation
Ignition temperature
Chance of catching fire during storage in open space

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Fuels and Combustion
By-products recovery process from coal carbonisation is termed as direct, indirect and semi direct process depending upon the method of recovery of

Tar
Benzol
None of these
Ammonia

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Fuels and Combustion
With increases in carbonisation temperature

Hydrogen percentage in the coke oven gas decreases
Tar yield increases
Methane percentage in the coke oven gas increases
Coke even gas yield increases

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Fuels and Combustion
Ignition temperature of a fuel in air is __________ that in pure oxygen.

Equal to
More than
Either more or less; depends on the type of fuel
Less than

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