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← ScienceWhich outcome results when exceeding the quench diameter limit in fuel injection systems?
A)Increased particulate matter concentration✓
B)Enhanced cyclical combustion stability
C)Higher overall thermal efficiency
D)Maximum reduction in NOx formation
💡 Explanation
In small engine combustors, exceeding the quench diameter limit results in increased particulate matter concentration because incomplete combustion takes place in the narrow unburned crevices, relying on diffusion flames. Therefore soot increases rather than efficient, complete combustion.
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