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Leakage Rate Standards & Air Tests

What is the correct order of the standard air brake inspection tests?

  • A.Spring brake check first, then drain the tanks, then drive
  • B.Build-up test, governor cut-out check, leakage tests, low-pressure warning test, and spring brake (pop-out) check
  • C.Leakage test only, with no other checks needed
  • D.Warning test while driving at highway speed
Correct answer

B. Build-up test, governor cut-out check, leakage tests, low-pressure warning test, and spring brake (pop-out) check

Why

The sequence follows the pressure story from full to empty: prove the system builds, holds, warns, and finally applies the springs. Doing it in order on the ground catches failures before they can matter at speed.

Manual topic: Air Brakes - Air Leakage and Brake Tests · From the Air Brakes practice bank (AB-080).

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