Which outcome occurs when ultra-lean fuel mixtures auto-ignite?

💡 Explanation

Knock-induced engine damage results from detonation waves caused by uncontrolled auto-ignition ahead of the flame front. The mechanism is uncontrolled homogeneous combustion, because the compressed unburnt mixture rapidly combusts; therefore it causes knock, rather than controlled combustion.

• Which increased risk results from hydrogen-induced cracking during post-tensioning?
• Which outcome is hastened when a pneumatic control valve experiences choked flow?
• Which optical effect limits channel capacity increases in dense wavelength division multiplexing?
• Which dangerous outcome occurs when fuel is atomized poorly?
• Which risk increases when using Time Division Multiplexing (TDM) over a communication channel with strict latency constraints?
• Which risk increases when symbol timing recovery deviates due to jitter in synchronous digital hierarchy (SDH) data transmission?