What happens if the train exceeds the maximum leakage during an air test?

Answer: D — It must be inspected for issues.

When a train exceeds the maximum leakage during an air test, it signals a potential issue within the air brake system. This is critical because excessive leakage can indicate a malfunction that may affect the train's ability to stop effectively, posing safety risks. In such cases, the standard procedure is to conduct an inspection to identify and rectify any problems contributing to the leakage. Conducting a thorough inspection is essential to ensure that all components of the air brake system are functioning properly and to maintain operational safety. This means checking hoses, fittings, and other relevant parts to identify leaks so that repairs can be made before the train resumes service. Ignoring the leakage or continuing operations without addressing the underlying problem would jeopardize safety, making inspection a necessary step in compliance with safety regulations and standards for train operation.