You are in the process of stopping a conventional train on an ascending grade with the slack stretched. How do you maintain a slack-stretched state while stopping?

You are in the process of stopping a conventional train on an ascending grade with the slack stretched. How do you maintain a slack-stretched state while stopping?

• A. When approaching the stopping point, make a brake pipe reduction, and as the train comes to a stop, apply the independent brake. After the independent brake is fully applied, reduce the throttle to idle.
• B. Apply independent brake first, then brake pipe reduction, and then idle
• C. Reduce throttle to idle first, then apply brakes
• D. Coast to a stop using only the train brakes

Answer: (A)

The main idea is to control braking forces across the train while keeping the locomotive from pulling on the cars as you stop, so the slack stays stretched and the stop is smooth on a grade. Start by applying the train brakes through a brake pipe reduction. This initiates braking across the entire train gradually, taking up slack slowly rather than letting the train lurch. As you near the stop, apply the locomotive’s independent brake. This holds the locomotive in place and prevents the engine from pushing or pulling against the rest of the train as it slows, which helps keep the slack taut between the locomotive and the cars. Once the independent brake is fully applied, reduce the throttle to idle so the engine isn’t contributing any propulsion. This sequence preserves the stretched slack and leads to a controlled, smooth stop. Using the independent brake first, or reducing throttle early, can cause abrupt slack action or allow the locomotive to move against the braking train, and relying on only the train brakes on an ascending grade can result in a jerky or unsafe stop.

The main idea is to control braking forces across the train while keeping the locomotive from pulling on the cars as you stop, so the slack stays stretched and the stop is smooth on a grade. Start by applying the train brakes through a brake pipe reduction. This initiates braking across the entire train gradually, taking up slack slowly rather than letting the train lurch. As you near the stop, apply the locomotive’s independent brake. This holds the locomotive in place and prevents the engine from pushing or pulling against the rest of the train as it slows, which helps keep the slack taut between the locomotive and the cars. Once the independent brake is fully applied, reduce the throttle to idle so the engine isn’t contributing any propulsion. This sequence preserves the stretched slack and leads to a controlled, smooth stop. Using the independent brake first, or reducing throttle early, can cause abrupt slack action or allow the locomotive to move against the braking train, and relying on only the train brakes on an ascending grade can result in a jerky or unsafe stop.