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Which outcome results when exceeding the flame quenching distance within an internal combustion engine?

A)Unburnt hydrocarbons increase significantly
B)Detonation risk decreases substantially
C)Thermal efficiency sees minor improvement
D)Nitrogen oxide emissions drastically drop

💡 Explanation

Exceeding the flame quenching distance will cause incomplete combustion, because heat transfers away from the flame front via thermal conduction, thereby extinguishing it before it fully consumes fuel, therefore unburnt hydrocarbons are released rather than reacting completely.

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