What is the consequence of tyre pressure that is too low?
- Low tire air pressure has no effect on driving.
- Increased driving noise.
- Correct answer: Increased fuel consumption and air pollution.
- Easy-to-turn steering wheel.
Why this is the answer
The correct answer in the official bank: Increased fuel consumption and air pollution.
An under-inflated tyre flattens more, so a larger part of it touches the road and rolling resistance rises. The engine has to work harder, which raises fuel consumption and air pollution. Low pressure also makes steering heavier, not easier, and the tyre overheats and wears faster. Check tyre pressure regularly against the manufacturer's recommended values.