Fuels and Combustion
Narrow coke ovens as compared to wider coke ovens

Produce stronger coke
Produce smaller coke
All of these
Require less time of carbonisation

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Fuels and Combustion
Fussain

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

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