Question 1676 · Traffic laws

What is the function of a vehicle’s retarder?

1. Serve as an alternative to the service brakes (foot brake), in order to stop the vehicle when it is under imminent danger during an emergency.
2. Assist the parking brake (hand brake) while parking on a steep descent.
3. Balance the engine’s function and regulate the motor rotations,
4. To reduce the vehicle speed, without using the vehicle’s braking system, e.g. during a long descent.

Correct answer: To reduce the vehicle speed, without using the vehicle’s braking system, e.g. during a long descent.

Appears in the exam for: Light truck (C1), Heavy truck (C), Bus (D)

Practise it in a full exam