While making a set out, after pressing the 'SET OUT' soft key and 'EXECUTE', you see a numeric value displayed for the FLOW status. What actions are required next?

While making a set out, after pressing the 'SET OUT' soft key and 'EXECUTE', you see a numeric value displayed for the FLOW status. What actions are required next?

• A. Close angle cock on both the portion to be left standing and rear locomotive or last car to be detached from the portion left standing, then separate the train.
• B. Increase the flow status by turning a valve.
• C. Notify supervisor.
• D. Separate the train.

Answer: (A)

When you see a numeric value for FLOW after setting out, it means there is still air flow between the portions that will be separated. The immediate, correct action is to close the angle cocks on both sides of the cut: on the portion you’re leaving in place and on the rear locomotive or last car to be detached from that portion. This shuts off the brake-pipe communication between the two parts, isolating them so each can retain proper brake control after separation. Once the circuit is isolated by closing those cocks, you can proceed to separate the train safely. Rationale for the other options: increasing flow by turning a valve would worsen the cross-connection, not fix it. Notifying a supervisor isn’t part of the mechanical isolation step, and separating the train without first isolating the brake pipe could compromise brake control on both parts.

When you see a numeric value for FLOW after setting out, it means there is still air flow between the portions that will be separated. The immediate, correct action is to close the angle cocks on both sides of the cut: on the portion you’re leaving in place and on the rear locomotive or last car to be detached from that portion. This shuts off the brake-pipe communication between the two parts, isolating them so each can retain proper brake control after separation. Once the circuit is isolated by closing those cocks, you can proceed to separate the train safely.

Rationale for the other options: increasing flow by turning a valve would worsen the cross-connection, not fix it. Notifying a supervisor isn’t part of the mechanical isolation step, and separating the train without first isolating the brake pipe could compromise brake control on both parts.