Why do MOT tests include an exhaust emission test?
- A To recover the cost of expensive garage equipment
- B To help protect the environment against pollution
- C To discover which fuel supplier is used the most
- D To make sure diesel and petrol engines emit the same fumes
Why this is the answer
Emission tests are carried out to make sure your vehicle’s engine is operating efficiently. This keeps the pollution produced by the engine to a minimum. If your vehicle is not serviced regularly, it may fail the MOT emissions test.
Why the other answers don't fit
- A
- To recover the cost of expensive garage equipment — Testing exists for the public benefit, not for the garage's.
- C
- To discover which fuel supplier is used the most — The test tells nobody where you buy your fuel.
- D
- To make sure diesel and petrol engines emit the same fumes — They are different engines, with different limits.
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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