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← ScienceWhich risk increases when a catalytic converter overheats?
A)Reduced catalyst surface area✓
B)Increased hydrocarbon conversion
C)Lower exhaust backpressure
D)Enhanced NOX reduction
💡 Explanation
Overheating leads to catalyst sintering, causing reduced catalytic activity because the increased temperature promotes thermal agglomeration. This decreases available surface area, therefore lowering efficiency, rather than improving conversion under normal operating temperature.
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