Fuels and Combustion
Improper storage condition results in the weathering of coal and spontaneous combustion, which increases its

Caking index
Friability & oxygen content
Calorific value
Yield of carbonised products

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Fuels and Combustion
Fussain

Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal
Is friable, charcoal like substance
All of these
Is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation

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Fuels and Combustion
Anthracite can be used for

Recarbonising steel
Making carbon electrodes
Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke
All of these

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