Which risk increases when an internal combustion engine runs lean?

💡 Explanation

Running lean causes incomplete combustion; the resulting excessively high combustion temperature causes pre-ignition. Because uncontrolled pre-ignition rapidly overheats engine components past safety limits, therefore it increases that risk, rather than decreasing catalytic converter lifespan from over-rich mixtures or turbine efficiency.

• Which consequence results when destructive measurement collapses an entangled photon-pair's state?
• Which efficiency loss occurs when an irreversible cycle operates?
• Which primary mechanism causes a buckyball (C60 molecule) to exhibit superconductivity when doped with alkali metals?
• Which mechanism causes complete electron pairing in superconductivity?
• Which outcome occurs when Zeolite catalyst active sites are exposed to high sulfur concentrations during hydrocarbon cracking?
• Which mechanism enables refrigeration during adiabatic expansion of isobutane?