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← TechnologyWhich outcome occurs when excessive cylinder head pressure increases force applied to an internal combustion engine's piston crown?
A)Piston ring groove deformation✓
B)Increased fuel injector backflow
C)Crankshaft bearing oil starvation
D)Valve timing advanced significantly
💡 Explanation
When excessive cylinder head pressure increases force on the piston crown, plastic deformation of the weaker piston ring grooves may occur, because the material's yield strength is exceeded. Therefore ring groove deformation occurs, rather than backflow, starvation or valve timing, which arise from different engine failures.
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