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← TechnologyWhich outcome occurs when piston "slap" mechanically over-stresses rings?
A)Reduced engine compression ratio✓
B)Increased indicated thermal efficiency
C)Decreased exhaust valve temperature
D)Optimized lubricating oil viscosity
💡 Explanation
Piston slap induces ring flutter which increases blow-by, resulting in reduced compression because sealing is compromised, rather than improved engine efficiency; therefore, compression diminishes rather than temperatures changes or optimizing lubrication because mechanical damage precedes thermal/fluid effects.
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