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Define hydrocarbon
Substance consisting of hydrogen and carbondefine
Define specific gravity
Weight of a gas as compared to weight of equal volume of air at standard conditions
Req air to gas ratio
10/1
Define yellow flame
No premixing of natural gas with required air for combustion.
Define blue flame
Blue colour, small, non luminous and higher temp. Premixing of fuel with req air for combustion
Primary air
Air that is premixed with the fuel
Secondary air
Air around the flame
Excess air
The supply above the ideal or theoretical air
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