Engineer Training

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Front #9

ABTH 103.6.1C

A train is approaching a descending grade. The independent brake and dynamic brakes are both fully applied. Place in order the remaining steps for starting movement on a descending grade:

Once the entire train is moving, gradually reduce the independent brake to avoid abrupt changes in slack.
Reduce the independent brake until the train gradually begins to move.
Put the automatic brake valve handle in RELEASE position (wait for all brakes to release and slack to adjust).
Slowly release the independent brake when the dynamic brake becomes effective.

Back #9

Flag

ABTH 103.6.1C

Answer: 1. Put the automatic brake valve handle in RELEASE position (wait for all brakes to release and slack to adjust). 2. Reduce the independent brake until the train gradually begins to move. 3. Once the entire train is moving, gradually reduce the independent brake to avoid abrupt changes in slack. 4. Slowly release the independent brake when the dynamic brake becomes effective.

Feedback:
Extended range dynamic brakes will normally start to become effective around five mph. At lower speeds, in this scenario, gradually release the independent brake to avoid abrupt changes in slack.