Which type of fire extinguisher should not be used on flammable liquids?
- A Water (red)
- B Foam (cream)
- C Dry powder (blue)
- D Carbon dioxide (black)
Why this is the answer
It's very important to know the correct fire extinguisher to use. They'll carry a coloured label or badge telling you their contents. Make sure you learn which extinguisher is which, as using the wrong one could be dangerous and may spread the fire further. For example, you should never use a water extinguisher on burning oil.
Why the other answers don't fit
- B
- Foam (cream) — Foam is made for flammable liquids and smothers them.
- C
- Dry powder (blue) — Dry powder works on liquids as well as on solids.
- D
- Carbon dioxide (black) — Carbon dioxide starves the fire of oxygen and is suitable for liquids.
Where this comes from
- Driving Buses and Coaches — section 12
- Driving Goods Vehicles — section 12
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: Lorry & Bus (LGV/PCV)
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