Manitoba Airbrake Practice Exam 2025 – Your All-in-One Guide to Mastering the Airbrake Test!

The purpose of the spring brake control or dash valve is to manually apply or release the spring brake. Spring brakes are typically used as an emergency braking system for air-braked vehicles. The control allows the driver to engage or disengage this braking mechanism, which is essential for ensuring safety during vehicle operation, especially in emergencies.

The spring brake is generally held in the released position by air pressure and will automatically engage when the air pressure drops below a certain threshold. Therefore, having the ability to manually apply or release it through the dash valve is critical for effective vehicle control, particularly in situations requiring immediate stopping power or during maintenance when the vehicle needs to remain stationary without relying solely on air pressure.

In contrast, measuring air pressure in the system, monitoring brake temperatures, and controlling brake fluid levels do not relate to the direct function of the spring brake control, making them irrelevant to the purpose of this particular component.