Air Brake Coach
Brake adjustmentQuestion 63 of 116

A standard Type 20 chamber is out of service at what applied stroke?

  1. 1 1/4 inches
  2. 1 3/4 inches (45 mm)
  3. 2 inches
  4. 2 1/2 inches
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Correct answer: 1 3/4 inches (45 mm)

A standard Type 20 chamber has a total stroke of 2¼ inches and is out of service at 1¾ inches (45 mm).

Source: Air Brake Manual: A Guide for Instructors (Government of Alberta, Alberta Transportation, March/April 2012), Module 8: Foundation brakes, page 80

Practice brake adjustment

Questions last reviewed: 18 October 2026