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Which risk increases when a bimetallic strip thermostat exceeds its temperature limit?

A)Material delamination due to thermal stress
B)Oxidation rate increase due to catalysis
C)Electrical conductivity decrease from doping
D)Creep deformation from prolonged stress

💡 Explanation

When the temperature limit is exceeded, differential thermal expansion causes excessive stress because the two metals expand at different rates, leading to the risk of delamination. Therefore material delamination results, rather than oxidation, conductivity changes or creep which involve different mechanisms.

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