Fuels and Combustion
Use of excess of combustion air in the combustion of fuels results in

Long flame
None of these
Condensation of water vapour from the fuel gas
Heat losses

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Fuels and Combustion
Fussain

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

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