How does a spring-loaded brake system work?

In a spring-loaded brake system, the primary function involves both the activation of the handbrake and the operation of compressed air. When the handbrake valve is engaged, it purges the air from the brake cylinder. This depletion allows the mechanical spring within the cylinder to take over and activate the brakes.

It is important to note that each part of the system plays a role in ensuring the vehicle can be safely halted or held stationary. The correct combination of answers describes the entire process: the activation of the handbrake, the removal of air, and the subsequent action of the spring. This aligns with German traffic regulations that emphasize vehicle safety systems being fully operational and effective under all circumstances. Understanding how these components work together helps ensure safe driving practices, as vehicles must have reliable braking mechanisms.