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← TechnologyWhich failure mode results when thermal expansion mismatches between an engine's pistons and cylinder walls increase?
A)Increased ring blow-by occurrence✓
B)Detonation threshold reduction
C)Elevated oil oxidation rates
D)Fuel injector fouling increase
💡 Explanation
Increased piston-cylinder thermal expansion mismatch leads to increased ring blow-by, because reduced sealing capabilities allow combustion gases to leak past the piston rings. Therefore, combustion pressure drops faster rather than being maintained for efficient power delivery.
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