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Front #78

ABTH 100.10.2

A train has received an Initial Terminal Air Brake Test with a yard test plant with a pressure setting of 90 psi. The air from the test plant was disconnected 6 hours before the crew coupled the locomotive consist to the train and cut in the air. Which air test is required after attaching the locomotives and cutting the air in?


  1. Class 1 Air Brake Test
  2. Cutting Off and Recoupling Air Test
  3. Class 1A Air Brake Test
  4. Class 3 Air Brake Test
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ABTH 100.10.2


Answer: Class 3 Air Brake Test
Feedback:
An Application and Release Air Brake Test can be performed if the train has been off air for 24 hours or less, and the air from the test plant is the same as the locomotive regulating valve setting (90 psi). Note: On the BNSF, all yard test plants use a pressure of 90 psi for air brake tests.