Flame 4
Flame 4 : It is generally conceded that burning materials, when supported by sufficient oxygen, produce luminosity called flame. It is generally accepted that flame is a distinct product of combustion. The sufficiency of the flame and its extension depends upon the fuel, availability of oxygen, and quality of fuel or fuel load. The color of the flame may vary with the type of fuel and also with conditions of draft; it may also vary with degree of temperature For example, a natural gas flame, under poor conditions of draft and ventilation, may appear lazy and yellow or orange; under appropriate and well adjusted ventilation effects, it may appear blue
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