Chapter 2 · 59 questions
Safety & Your Vehicle
Tyres, brakes, lights, loading, fuel efficiency and the vehicle checks that keep you and your car roadworthy.
Sample questions
What is the minimum legal tread depth for a car tyre in the UK?
- · 1.0 mm
- ✓ 1.6 mm
- · 2.0 mm
- · 3.0 mm
Car tyres must have at least 1.6 mm of tread across the central three-quarters of the tyre and around the whole circumference (rule 89).
When should you check your tyre pressures?
- · Only at an MOT
- ✓ When the tyres are cold
- · Straight after a long fast drive
- · Only when one looks flat
Check pressures when tyres are cold for an accurate reading, and increase them for heavy loads or fast driving (rule 89).
What can under-inflated tyres cause?
- · Better fuel economy
- ✓ Increased stopping distances and uneven wear
- · Quieter running
- · Higher top speed
Under-inflated tyres wear unevenly, overheat and lengthen stopping distances, increasing the risk of a blowout (rule 89).