Which risk increases when rapid cylinder pressure changes stress an internal combustion engine's piston beyond its yield strength?

💡 Explanation

When the piston experiences stress beyond its yield strength, plastic deformation occurs due to dislocation slip within the metal's crystal structure, leading to loss of shape. Therefore piston ring blow-by results, rather than bearing failure, valve damage or injector clogging, which are caused by lubrication issues, mechanical wear patterns, or fuel impurity respectively.

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