What's the purpose of a catalytic converter?
- A To reduce fuel consumption
- B To reduce the risk of fire
- C To reduce harmful exhaust gases
- D To reduce engine wear
Why this is the answer
Catalytic converters reduce a large percentage of harmful exhaust emissions. They work more efficiently when the engine has reached its normal working temperature.
Why the other answers don't fit
- A
- To reduce fuel consumption — It treats what leaves the engine. It does not save you fuel.
- B
- To reduce the risk of fire — Fire risk is not what it addresses.
- D
- To reduce engine wear — Engine wear is a matter for oil and servicing.
Where this comes from
- Driving: the essential skills — section 17
Rule numbers link to The Highway Code on gov.uk.
Where this question comes from
The question, its options and the explanation are reproduced word for word from the DVSA revision question bank under licence. The licence requires them to appear unaltered, so we cannot reword them and neither can anyone else — that is why you will meet the same wording on other sites. Everything else on this page is written by Theory Hub: the explanation of why each wrong answer is wrong, the topic guide and the revision notes.
Asked in: Car , Motorcycle
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