During combustion of a gaseous fuel, the presence of a non-luminous flame is an indication of the____________________?
Correct answer: B. Complete combustion
- A. Incomplete combustion
- B. Complete combustion
- C. High oxygen in flue gas
- D. None of these
Explanation
A non-luminous, blue flame generally indicates that the gaseous fuel is mixing well with sufficient oxygen and burning completely. Incomplete combustion usually produces a luminous yellow flame because of glowing soot particles.
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