How does the parking brake function?

The parking brake functions by trapping fluid against the brakes, allowing the vehicle to remain stationary when parked. This method creates a hydraulic lock that prevents the brake components from moving, ensuring that the vehicle does not roll away. When the parking brake is engaged, the mechanism operates to hold the brakes in a position that resists any movement of the wheels.

This is critical for safety, especially on inclines or uneven surfaces, as it provides a reliable way to keep the vehicle stable without relying on the engine or transmission to hold it in place. The other choices do not accurately describe the operation of a parking brake. For instance, releasing fluid under pressure is a function of the hydraulic system during regular braking, and pushing the brakes with a lever does not reflect how the parking brake maintains its hold. Similarly, locking the steering mechanism is unrelated to the braking system’s ability to secure the vehicle while parked.