How often should you test the functionality of your air brake system?

Answer: B — Before every trip as part of pre-trip inspection

Testing the functionality of your air brake system before every trip as part of your pre-trip inspection is crucial for ensuring safety on the road. This routine check verifies that all components of the air brake system are functioning properly, minimizing the risk of brake failure during operation. By conducting this test regularly, drivers can identify any issues such as leaks or pressure drops that may compromise the braking system's effectiveness. This proactive approach enhances overall vehicle safety and helps prevent accidents, making it an essential practice for all drivers operating vehicles with air brakes.