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Front #11

ABTH 103.6.3B

A crew is approaching a permanent speed restriction on a level grade with the slack bunched. The engineer will be using only air brakes to slow down. With the throttle in Idle, the engineer will make a __________ at a sufficient distance from the speed restriction.

  1. 20-psi brake pipe reduction
  2. Minimum brake pipe reduction
  3. 15-psi brake pipe reduction
  4. Full service brake pipe reduction
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ABTH 103.6.3B


Answer: Minimum brake pipe reduction
Feedback:
When air brakes are used to control train speed, begin with a minimum reduction, and then use split reductions of 2?3 psi spaced 30 seconds apart for additional brake pipe reductions.