Air Brake Coach
System partsQuestion 10 of 116

How many full service brake applications must the tank volume of a power unit supply?

  1. 4
  2. 12
  3. 8
  4. 20
Show answer

Correct answer: 12

Tank volume must supply at least 12 full service applications for power units.

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

Practice system parts

Questions last reviewed: 18 October 2026