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Why does the legal stroke limit vary between brake chambers?
- A.Chambers of different sizes and long-stroke designs have different diaphragm travel and rated stroke limits
- B.The limit changes with the color of the slack adjuster
- C.All chambers share one limit regardless of design
- D.The limit depends only on the driver's experience
Correct answer
A. Chambers of different sizes and long-stroke designs have different diaphragm travel and rated stroke limits
Why
A larger or long-stroke chamber is built to move farther before it loses effective force. Using the wrong limit can pass a brake that is actually out of adjustment or fail one that is still within its design range.
Manual topic: Air Brakes - Slack Adjusters · From the Air Brakes practice bank (AB-165).