On a vehicle, where would you find a catalytic converter?
- A In the fuel tank
- B In the air filter
- C On the cooling system
- D On the exhaust system
Why this is the answer
Although carbon dioxide is still produced, a catalytic converter fitted to the exhaust system reduces the toxic and polluting gases by up to 90%.
Why the other answers don't fit
- A
- In the fuel tank — It works on what leaves the engine, not on what goes in.
- B
- In the air filter — The air filter cleans air going in, not gases coming out.
- C
- On the cooling system — Cooling has nothing to do with treating emissions.
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
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