What is required to endorse a vehicle with air brakes?

To endorse a vehicle with air brakes, passing an air brake knowledge test is required. This test evaluates a driver's understanding of how air brake systems operate, including their components, how to safely operate vehicles equipped with air brakes, and how to inspect these systems for safety before driving. Understanding the mechanics and requirements of air brakes is crucial because they function differently from hydraulic brakes, and improper use can lead to accidents. Successfully passing this knowledge test demonstrates that the driver has the necessary information and skills to handle vehicles with air brake systems safely.