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

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

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

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