Fuels and Combustion
Presence of nitrogen in combustion air does not reduce the

Any of the above
Flue gas temperature
Flame temperature
Amount of heat liberated

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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

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

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