Air Brake Coach
System partsQuestion 9 of 116

Air tanks must pass a hydrostatic test. What is the minimum test pressure?

  1. Equal to the cut-out pressure
  2. 2 times the cut-in pressure
  3. 5 times the compressor cut-out pressure, or 500 PSI, whichever is greater
  4. 100 PSI
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Correct answer: 5 times the compressor cut-out pressure, or 500 PSI, whichever is greater

The manual sets the test at 5 times the cut-out pressure or 500 PSI (3,448 kPa). The greater value applies.

Source: Air Brake Manual: A Guide for Instructors (Government of Alberta, Alberta Transportation, March/April 2012), Module 4: Service circuits, page 47

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Questions last reviewed: 18 October 2026