Question

when the catalyst of a catalytic converter is contaminated with lead and silicone, then the converter must be typically

a. restored by correcting any conditions that caused the contamination
b. replaced
c. serviced by driving the vehicle for an extended time at freeway speeds
d. cleaned

Explanation:

When a catalytic converter's catalyst is contaminated with lead and silicone, these contaminants are difficult to remove through simple cleaning or driving at high speeds. Once contaminated in this way, the catalytic converter's performance is severely degraded and it cannot be effectively restored by just correcting the contamination - causing conditions. The only practical solution is to replace the catalytic converter.

Answer:

B. Replaced