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← TechnologyWhich outcome increases when turbocharger boost exceeds fuel octane rating?
A)Increased volumetric efficiency only
B)Detonation and pre-ignition risks✓
C)Lowered exhaust gas temperature
D)Reduced turbocharger bearing stress
💡 Explanation
Increased boost and insufficient octane lead to detonation because auto-ignition temperature decreases before spark. Detonation occurs therefore rather than optimal combustion due to uncontrolled flame fronts disrupting the engine; insufficient octane accelerates this process.
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