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← TechnologyWhich symptom appears when fuel auto-ignition occurs within a gasoline engine?
A)Engine knocking✓
B)Increased fuel efficiency
C)Reduced exhaust emissions
D)Smoother idling
💡 Explanation
Engine knocking happens because auto-ignition creates uncontrolled combustion events that collide with the flame front initiated by the spark plug, via detonation. Therefore pinging or knocking is heard, rather than even combustion.
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