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Front #59

ABTH 104.7.2

In freight service, when is it permissible to use the PASS function of the automatic brake valve cutout valve?

  1. When the equalizing reservoir pressure is leaking
  2. When the brake cylinder pressure is leaking
  3. When the brake pipe pressure is leaking
  4. When the main reservoir pressure is leaking
Back #59
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ABTH 104.7.2


Answer: When the equalizing reservoir pressure is leaking
Feedback:
The Pass position is still considered to be "cut-in"; however, when the valve is in this position, any movement of the brake handle to the Release position could inadvertently cause all the air brakes to release.