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← TechnologyWhich outcome is amplified when diesel engine fuel injectors deliver excessive fuel quantity?
A)Increased exhaust opacity and particulate matter✓
B)Reduced engine knock and combustion stability
C)Lowered peak cylinder pressure and temperature
D)Optimized combustion efficiency and fuel economy
💡 Explanation
When fuel injectors deliver excessive fuel, incomplete combustion occurs because of oxygen deficiency in combustion chamber, leading to increased emissions. Therefore, increased particulate matter and opacity results, rather than stability, pressure reduction or enhanced efficiency, all requiring more balanced air-fuel mixture.
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