Air Brake Coach
Brake adjustmentQuestion 62 of 116

Which axles use Type 20 brake chambers?

  1. Drive axles
  2. Trailer axles
  3. Steering axles
  4. All load bearing axles
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Correct answer: Steering axles

Type 20 chambers are for steering axles. Type 30 chambers are for drive and trailer axles.

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