What is the normal reading of the red hand on the duplex air gauge?

The normal reading of the red hand on the duplex air gauge is typically around 90 pounds. This reading indicates the optimal pressure level for the operation of various systems within the train, such as the air brake system. A reading at this level ensures that the brakes have sufficient air pressure to function safely and effectively, contributing to the overall safety of train operations.

It’s important for train operators to recognize this standard so they can monitor the air pressure accurately. Readings significantly below or above this level could indicate potential issues that need to be addressed, such as air leaks or insufficient air supply, which could affect braking performance and overall train safety. Hence, understanding this normal reading is vital for ensuring the reliability of the train’s systems while in operation.