The auxiliary (parking/hand) brake may also be used:
- To reduce wear and tear of the braking system.
- Correct answer: As an emergency brake .
- To prevent the vehicle from moving only.
- To assist drivers while driving in reverse.
Why this is the answer
The correct answer in the official bank: As an emergency brake .
The parking or hand brake is mainly meant to hold the vehicle still when it is stopped, but it can also serve as an emergency brake if the main brakes fail. Its stopping power is limited, because it usually acts on only some of the wheels, so stopping takes longer. It is not meant for reducing brake wear or for slowing down on descents.