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 mechanism enables lossless current flow within a superconducting magnetic energy storage (SMES) coil?
• Which outcome results when applying shear stress to solid ionic crystal?
• Which mechanism causes chromatic aberration in multi-lens optical systems?
• Which outcome results when mechanical stress exceeds a polymer's yield strength?
• Which outcome occurs when moisture permeates a cryogenic storage tank?
• Which outcome results when exceeding Reynolds number threshold aileron?