What is the main function of the auxiliary brake (hand/parking brake)?
- To assist new drivers in downhill braking.
- Correct answer: To make sure that the vehicle doesn’t move while parked.
- The auxiliary brake (hand/parking brake) has no function and it shouldn’t be used at all.
- To enhance the braking capacity of the service/leg brake.
Why this is the answer
The correct answer in the official bank: To make sure that the vehicle doesn’t move while parked.
The auxiliary or parking brake is mainly meant to hold the vehicle still when it is parked or standing, so it cannot roll away, especially on a slope. Braking while driving, including downhill, is done with the service (foot) brake, and the parking brake is not designed to boost it. Always apply the parking brake before leaving the vehicle.