Fuels and Combustion
Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its

All of these
Sulphur content is lower
Flue gas has lower dew point thereby facilitating more waste heat recovery
Emissivity factor is higher

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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

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

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