Which brake is engaged when parking on a hill?

When parking on a hill, the parking brake is engaged to secure the vehicle in place. The primary function of the parking brake, also known as the handbrake or emergency brake, is to prevent the vehicle from rolling away when it is stationary. This is especially important on inclines, as gravity can cause a parked vehicle to move if the regular braking system is not adequately holding it in place.

The parking brake typically engages the rear wheels, creating friction that keeps the vehicle secure, regardless of the incline. This is essential for safety, as it reduces the risk of accidents associated with a rolling vehicle. Drivers are generally encouraged to engage the parking brake whenever they park, especially on hills, to ensure maximum stability.

The other types of brakes mentioned—power brakes, hydraulic brakes, and disc brakes—are primarily designed for stopping the vehicle while it is in motion, and they do not serve the specific purpose of holding the vehicle stationary on a slope like the parking brake does.