Who is authorized to perform Class 1 brake tests on passenger equipment according to regulations?

Answer: C — qualified maintenance person (QMP)

The correct answer highlights that a qualified maintenance person (QMP) is specifically authorized to perform Class 1 brake tests on passenger equipment. This regulation ensures that individuals conducting such tests have undergone the necessary training and possess the expertise required to assess the safety and functionality of the braking system. Class 1 brake tests are crucial for verifying that all brake components are in proper working order before a train is put into service, thereby ensuring passenger safety. While other personnel may be qualified in various capacities, such as a qualified person (QP) or even a train conductor, not all are necessarily trained to the same level of detail regarding brake systems. The designation of a QMP underscores the importance of having specialized knowledge in maintenance procedures, ensuring that brake tests are performed by individuals who have met stringent regulatory standards and have the technical understanding necessary to identify potential issues with the braking system.