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Which outcome occurs when the mixture control lever malfunctions on a piston aircraft engine causing excessively rich combustion during high altitude flight?

A)Icing of the venturi throat
B)Carbon monoxide poisoning increases
C)Increased exhaust gas temperature
D)Detonation margins are substantially wider

💡 Explanation

Carbon monoxide poisoning increases because incomplete combustion enriches CO formation via the water gas shift reaction. Therefore, CO leaks increase significantly, rather than temperatures rapidly increasing which would require significant fuel.

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