When a distributed power train is stopped and movement is delayed, what must be done prior to releasing the automatic brake?

When a distributed power train is stopped and movement is delayed, what must be done prior to releasing the automatic brake?

• A. Apply Train Brakes With At Least a 10-Psi Brake Pipe Reduction And Use The Automated Train Check Feature To Verify Brake Pipe Continuity
• B. Apply Train Brakes With At Least a 10-Psi Brake Pipe Reduction
• C. Use The Automated Train Check Feature To Verify Brake Pipe Continuity
• D. Wait Until The Signal To Release The Brake

Answer: (A)

When a distributed power train is stopped and movement is delayed, you must confirm the brake system is truly ready before releasing the automatic brake. This means applying the train brakes to produce a measurable brake pipe reduction of at least 10 psi and then using the automated train check to verify brake pipe continuity along the entire train. The 10 psi reduction shows the brakes actually respond and some brake pipe pressure is dropped where the brakes are applied, while the automated check confirms there are no leaks or broken connections so the brake pipe signal will propagate correctly to all units. Doing both ensures the brakes are firmly set and can be released safely across the entire train; relying on only one of these steps risks a partial or unsafe release if a pipe leak or disconnected segment exists. Waiting for a signal to release or checking continuity alone doesn’t guarantee this safe, uniform state across the train.

When a distributed power train is stopped and movement is delayed, you must confirm the brake system is truly ready before releasing the automatic brake. This means applying the train brakes to produce a measurable brake pipe reduction of at least 10 psi and then using the automated train check to verify brake pipe continuity along the entire train. The 10 psi reduction shows the brakes actually respond and some brake pipe pressure is dropped where the brakes are applied, while the automated check confirms there are no leaks or broken connections so the brake pipe signal will propagate correctly to all units. Doing both ensures the brakes are firmly set and can be released safely across the entire train; relying on only one of these steps risks a partial or unsafe release if a pipe leak or disconnected segment exists. Waiting for a signal to release or checking continuity alone doesn’t guarantee this safe, uniform state across the train.