Revision question · Braking systems

Where must extra care be taken when using an endurance brake (retarder)?

Revision material from the imported DVSA bank includes source-checked Lanekind learning corrections. These corrections are not newly issued official examination questions, and practice does not reproduce a live test paper.

Answer options

On uneven roads

On slippery roads

On downhill gradients

On uphill gradients

Show the answer

On slippery roadsThis was the right answer

The endurance brake (retarder) slows the vehicle without the use of the wheel-mounted brakes. However, care should be taken in slippery conditions, when the retarder's effect can be powerful enough to cause a skid.

Reviewed reading for this question

Respect the retarder’s low-grip restrictionReviewed guidance summary · An independent retarder can lock or slide the driven wheels on snow or other low-grip surfaces; the lesson retains vehicle-specific prohibitions rather than merely saying to pull the lever gently.

Loading the questions