What should be checked regarding the brake system during the pre-trip inspection?

During the pre-trip inspection, it's crucial to check for leaks and ensure the proper function of all brakes. This includes inspecting both the service brakes and the parking brake to affirm that they are operational. Ensuring that there are no air leaks in the system is vital for maintaining adequate braking performance.

Proper functioning of the brakes not only involves checking the physical components but also confirming that the entire braking system is working as intended, which is essential for safe operation on the road. Identifying leaks, wear, and ensuring that the brake adjustment is correct are all components of this inspection.

The focus on the overall condition of the braking system is important because relying on just one aspect, such as fluid levels or the appearance of brake pads, doesn’t give a complete picture of the system's safety and reliability. Therefore, a comprehensive check that includes functionality and potential leaks is the best practice.