Discussion
Statement I: The air entering a combustor is divided between several zones rather than admitted at once.
Statement II: The overall mixture is far too lean to sustain a flame.
In the light of the above statements, choose the correct answer.
Answer: C
Both statements are true and the second is the reason. Admitting all the air at the injector would give an equivalence ratio near 0.25, at which no flame could survive, so the primary zone receives only the share that makes it stoichiometric.
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