What is the first action a train operator must take after pulling the emergency alarm due to smoke?

The first action a train operator must take after pulling the emergency alarm due to smoke is to notify the rail control center. This is crucial because the control center can coordinate an appropriate emergency response, which includes alerting emergency services, other trains, and potentially managing the movement of the train. This communication ensures that all necessary steps are taken promptly and effectively to safeguard passengers and crew.

While evacuating passengers and extinguishing the smoke source are important steps that may follow, they are dependent on the operator's ability to communicate the situation first. Stopping the train immediately may be part of the response but notifying the control center allows for a more coordinated and safe approach to managing the emergency and ensuring that everyone on board is informed and directed towards safety.