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Fuels and Combustion

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

8
52
22
14

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Fuels and Combustion
The main advantage of forced draft over natural draft is that

Smaller height chimney can be used
Combustion of fuel is complete
Furnace control is easier
All of these

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Fuels and Combustion
Coals used for the generation of producer gas should have

Very low ash content (8-10%)
Low fusion point of ash
High volatile matter content
High caking index

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Fuels and Combustion
Volumetric ratio of Nā‚‚ to Oā‚‚ in dry atmospheric air is

4.76
3.76
0.79
0.21

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Fuels and Combustion
Washing of coal is done to reduce the

Adhering impurities
Both B and C
Mineral matter
Inherent impurities

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Fuels and Combustion
In low temperature carbonisation (as compared to high temperature carbonisation) of coal

Free carbon in tar is more
All of these
Aliphatic tar is produced
Ammonia yield is more

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