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Which consequence results when differential expansion stresses exceed material strength in a bimetallic strip within a combustion engine's preheating system?

A)Premature sensor fatigue failure
B)Enhanced catalytic converter efficiency
C)Optimized fuel-air mixture formation
D)Increased thermal engine efficiency

💡 Explanation

Sensor fatigue occurs because differential thermal expansion imposes cyclic stress, weakening metal via fatigue. Therefore sensor failure occurs, rather than engine optimization, or catalysis, because fatigue is a material property leading to cracking under cyclic stress.

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