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Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about __________ percent.

Question: Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about __________ percent.
[A].

< 2

[B].

< 5

[C].

< 8

[D].

< 10

Answer: Option A

Explanation:

No answer description available for this question.