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← TechnologyWhich risk increases when exceeding maximum diesel piston temperature?
A)Increased thermal fatigue cracking✓
B)Increased compression ratio stability
C)Reduced combustion chamber pressure
D)Reduced lubricating oil viscosity
💡 Explanation
Increased diesel piston temperature will cause thermal fatigue cracking because creep deformation raises stress beyond fatigue limits. The mechanism is thermal expansion stressing the metal therefore cracking, rather than increasing stability, changing combustion pressures, or changing oil viscosity.
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