How often must a Class 1 brake test be performed according to 49 CFR guidelines?

A Class 1 brake test must be performed before every trip to ensure the safe operation of the train and compliance with safety regulations. This requirement is established in the 49 CFR guidelines, which dictate that a thorough inspection of the braking system is necessary to confirm that all components are functioning correctly prior to departure. Conducting this test before each trip minimizes the risk of brake failures while the train is in transit, thereby enhancing safety for both the crew and passengers. This practice reinforces the responsibility of train operators to maintain high safety standards in the railroad industry.

The other options suggest intervals or conditions that do not align with the stringent safety requirements outlined in the regulations. For example, performing the test only every 24 hours or once per week could lead to a greater risk of undetected issues with the braking system, while conducting it only when equipment is used might overlook potential problems if the equipment has been idle for an extended period.