Fuels and Combustion
A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon

Is more difficult to ignite and produces a shorter flame
Is less liable to spontaneous combustion on storage
None of these
Requires smaller combustion space and less secondary air

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Fuels and Combustion
Low temperature carbonisation

Is meant for the production of 'metallurgical coke'
Produces higher quantity of gas than high temperature carbonisation
Produces less quantity of tar than high temperature carbonisation
Is mainly for producing the smokeless domestic coke

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