Correct answer
When they are cold.
With the tyres cold, using the recommended value for the load and operating conditions. Pressure normally rises as tyres heat up during driving: a hot reading is not fictitious pressure, but should not be compared directly with the cold reference value. Do not release air to compensate for this normal rise. Check regularly rather than waiting until a tyre looks deflated.
Practice more D licence questions
A self-check with exam-style questions on Mechanics and maintenance. Free, no signup.
All options
When they are hot.
When they are cold.
Only when they are deflated.
Editorial status: editorially approved. This status does not certify legal review. Report a correction
Share this question
Keep studying
Glossary terms in this question
Related questions
- If you notice unusual noises or vibrations in a D1 or D bus, the prudent action is to:
- What is the maximum authorised mass per single driven axle of class II (interurban buses)?
- When snow chains are the chosen anti-skid option for a bus, what minimum placement does the General Vehicle Regulations require, while also following fitting instructions?
- On a new tyre, the label in the image provides information on environmental and safety aspects. What information does this label include, among other things?
- In a vehicle whose cooling system has an expansion tank with level marks, where do you check the coolant level according to the manufacturer’s instructions?
- A 24 V starting system uses two identical compatible 12 V batteries. Which connection adds their nominal voltages?