DGT B licence questions: Tyres and grip

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Question index View topic Practise Tyres and grip

How many rear-view mirrors must a two-wheeled moped carry as a mandatory requirement?
Regarding ageing of passenger-car tyres, which action is appropriate?
Besides checking before long trips or whenever necessary, how often should tyre pressure normally be checked?
Correct tyre inflation pressure...
With the engine already running, why may it be difficult to move off on snow?
Under the current Annex VII, which pictogram accompanies the M+S, M&S or M.S marking on snow tyres approved for severe snow conditions?
You will park a car with a trailer on a significant gradient and leave the driving position. In addition to the usual measures, how must…
On a snow-covered mountain pass’s passability sign, which panel colour indicates the general requirement for chains or special tyres for a…
In a conventional car without adapted controls, which control normally operates the service brake?
In a car without ABS, you notice the wheels locking when braking in a curve. What should you do with the brake?
Where is the pressurised air located in tubeless tyres?
What is the name of the ADAS system that warns if a tyre has lost pressure?
Which of these causes can lead to excessive tyre wear?
The tyre inflation pressure...
Worn tires can cause:
What is an essential function of ABS during hard braking?
From 1 January 2026, what device must a car registered in Spain carry to warn of immobilisation on Spanish roads?
When crossing a low-grip area in a straight line on a motorcycle, what is recommended?
In heavy rain, poor tyre condition mainly increases the risk of:
What can accelerate tyre wear?
When the road is icy...
What do the letters M+S that may appear on a tyre mean?
Your car has no winter tyres and needs chains to continue on a snow-covered road. When should you fit them?
When braking a car in a straight line on level ground, towards which axle is vertical load transferred?
In a car, cold inflation pressure above the manufacturer’s specification for the load can...
What is normally used to inflate a passenger car’s tyres with a service-station compressor?
If you notice that the vehicle pulls to one side when driving in a straight line, this could be due to...
What effect can inflation pressure below the manufacturer’s recommendation produce?
Which system helps keep tyres in contact with the road and absorbs road irregularities?
During straight-line forward acceleration on level ground, towards which axle is vertical load transferred in a car?
You park your vehicle, fitted with a manual gearbox, on a downhill slope. Which gear should you leave engaged?
When does a skid occur?
The braking distance...
For transport fully subject to the equipment requirements of ADR 8.1.5.2, what wheel-chock provision is required?
Where is pressurised air held in a car’s tubeless tyre?
What effect can an imbalance of the wheel-and-tyre assembly produce?
How should we drive up an upward slope covered in snow?
After a dry period, the first drops of rain begin to fall. Why must you take extra care?
In a manual-transmission car on snow, under conditions allowing a safe start, which technique helps reduce wheel spin?
In a conventional two-axle car, without using an emergency spare, which rule must be observed when fitting tyres?
What is the name of the vehicle system that prevents the wheels from locking?
In a car with a conventional vacuum brake booster, the engine is stopped, the stored vacuum has been exhausted and no auxiliary assistance…
When driving, what precautions should be taken in the event of heavy rain?
In a conventional rear-wheel-drive vehicle with the gearbox at the front and a separate differential at the rear axle, which component…
With other factors comparable, which surface can provide poorer tyre grip?
Excluding the regulatory exception for certain historic vehicles, for a car’s tyres, what is the legal minimum tread depth in the principal…
A vehicle over 3,500 kg maximum authorised mass is parked on a substantial slope and the driver leaves their position. In addition to…
A tyre with incorrect inflation pressure...
How should you act when the rear wheels skid?
Which of these causes can lead to an imbalance in a vehicle's wheels?
A vehicle is being driven with low tyre pressure. How much fuel will it use?
In a car with correctly functioning ABS, an emergency on a bend requires braking to avoid a collision. How should you operate the brake…
For an externally bleeding wound on an arm or leg with no embedded object, which initial action helps control the bleeding?
A two-wheeled vehicle without a sidecar, with an internal-combustion engine capacity greater than 50 cm³, is classified as...
When it rains, how do the vehicle's wheels grip the road?
If you must use a temporary spare wheel after a puncture, which speed limit must you observe?
How should the pressure of the vehicle's tyres be checked?
Which of the following characteristics must a wheel rim have to work correctly?
How should you drive up slopes if the road surface is covered in snow?
Which measure helps reduce the risk of aquaplaning?
What can cause irregular wear of a vehicle's tyres?
Which system helps keep the wheels in contact with the road and absorb its irregularities, supporting grip and braking?
Excluding the regulatory exception for certain historic vehicles, in a category M1 passenger car, which of these measures helps maintain…
Which example describes direct damage to a tyre?
By orientation, what two common names describe tread grooves that help drain water from a tyre?
What condition must a motorcycle’s tyres meet for safe road use?
In a manual car whose manufacturer permits starting in second gear on snow, with enough grip to continue, which option helps you move off…
What effect does snowfall have on a moving vehicle?
What is the pattern of grooves in a tyre’s tread called?
A car is stuck in mud in a safe place. Its manual allows preparing the surface with suitable material while immobilised, with nobody near…
To comply with winter-mobility restrictions using 3PMSF-certified tyres, a car with MAM no greater than 3,500 kg must have them, under the…
When tyres are underinflated...
You park a car towing a light trailer on a noticeable slope and leave the driving position. Besides applying the parking brake and taking…
What function does a pneumatic tyre’s flexibility serve when rolling over small surface irregularities?
Which of the following effects is caused by thick fog?
Which components should the driver regularly check for cold inflation pressure, following manufacturer values?
How should the tyres be when their pressure is checked?
Which outer part of a tyre is intended to contact the road?
Regarding ageing of passenger-car tyres, which action is appropriate?
In a tyre, what main function does the casing serve as a load-bearing structure together with inflation pressure?
What is the maximum number of authorised seats, including the driver's, that a van may have in order to be allowed to travel on the road?
Under comparable conditions, with tyres in good condition, which surface offers better grip than a highly polished or icy surface?
Who should carry out wheel balancing?
Which instrument measures tyre pressure?
In a combustion-engined car, which system mechanically transmits engine motion to the driven wheels?
When must a passenger-car tyre with deterioration incompatible with safe use be replaced?
If you are riding a motorcycle and the road surface is wet, is it necessary to increase the tyre inflation pressure above that recommended…
If the use of chains is compulsory, on which wheels must they be fitted?
Under what conditions should snow chains be used?
What will happen if we drive at high speed in an area where aquaplaning occurs?
Which alternative to a full-size spare wheel do some vehicles carry to continue temporarily after a puncture?
Do tubeless tyres exist?
An external wound with no embedded object is bleeding. After making the scene safe and requesting help as needed, what initial measure is…
If the tyre inflation pressure is lower than recommended, does fuel consumption increase?
On a rain-wet road, under conditions comparable to a dry road, how should you anticipate a planned braking manoeuvre?
When the wheels bounce excessively over potholes, what may be a cause?
With tyres in suitable condition, what loss-of-control risk can increase when braking abruptly while taking a bend?
Keeping the other required characteristics for ordinary tyres, may you choose a tyre with a speed rating higher than required in the…
Can excessive heat contribute to tyre deterioration or wear?
The braking distance can increase...