Fuels and Combustion
Which of the following will generate maximum volume of product of complete combustion (Nm³/Nm³ of fuel) ?

Natural gas
Carburetted water gas
Producers
Blast furnace gas

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Fuels and Combustion
Fussain

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

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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 less liable to spontaneous combustion on storage
None of these
Is more difficult to ignite and produces a shorter flame

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