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← ScienceWhich risk increases when a catalytic converter’s honeycomb structure becomes clogged?
A)Reduced catalyst active surface area
B)Increased back pressure within exhaust✓
C)Higher rate of catalyst degradation
D)Decreased exhaust gas temperature
💡 Explanation
Increased back pressure occurs because clogging obstructs exhaust flow. Physical obstruction is the mechanism, leading to pressure build-up. Therefore pressure behind the engine increases rather than lowering exhaust temperatures or directly reducing catalyst surface area or stability.
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