Revision question · Band 2 traffic signs and signals, car control, pedestrians, mechanical knowledge

Why are new vehicles fitted with catalytic converters?

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Answer options

To control exhaust noise levels

To prolong the life of the exhaust system

To allow the exhaust system to be recycled

To reduce harmful exhaust emissions

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To reduce harmful exhaust emissionsThis was the right answer

Engines burning fossil fuels produce harmful gases. We need to be concerned about the effect this has on our environment. A catalytic converter acts like a filter, removing most of the harmful compounds from the exhaust gas.

Reviewed reading for this question

Vehicle maintenanceHighway Code annex · A catalytic converter is exhaust-treatment equipment that reduces specified harmful compounds; it does not eliminate carbon dioxide.

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