Which of the following is crucial for maintaining air brake systems?

Regular inspection of air hoses and connections is essential for maintaining air brake systems because these components are critical for the overall functionality and safety of the braking system. Air hoses transport compressed air from the compressor to the brake chambers, and any leaks or weaknesses in these hoses could lead to a loss of air pressure, resulting in diminished braking power or complete brake failure. Inspecting connections ensures that there are no loose fittings or connections that could also cause leaks.

By keeping a close eye on the condition of these hoses and connections, a driver can catch potential issues early, ensuring that the braking system remains effective and safe. This proactive maintenance is a key aspect of ensuring the truck or vehicle operates reliably and minimizes risk on the road.

Other aspects of maintenance, such as testing brake pads, checking tire pressure, or changing engine oil, play important roles in overall vehicle maintenance, but they do not directly pertain to the specific requirements of air brake system functionality as much as inspecting air hoses and connections does.