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Which outcome occurs when exceeding the design limits of reciprocating engine's connecting rod?

A)Increased frictional bearing surface temperature
B)Decreased volumetric unburned mixture efficiency
C)Catastrophic fatigue fracture occurs rapidly
D)Elevated compression ratio during adiabatic phase

💡 Explanation

Catastrophic fatigue fracture occurs because exceeding design limits promotes cyclical stress, driving fatigue crack propagation via crack tip plasticity mechanism; therefore fracture, rather than altered efficiency, is expected, because the material fails structurally, not thermodynamically, initially.

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