Air Brake Coach
System partsQuestion 3 of 116

At what pressure range does the governor cut out?

  1. 60 to 80 PSI
  2. 90 to 100 PSI
  3. 120 to 135 PSI
  4. 150 to 170 PSI
Show answer

Correct answer: 120 to 135 PSI

The practical test tells you to build air to the maximum. The governor must cut out at 120 to 135 PSI.

Source: Air Brake Manual: A Guide for Instructors (Government of Alberta, Alberta Transportation, March/April 2012), Air Brake Practical Test (DPLS0003): Supply circuit, page 123

Practice system parts

Questions last reviewed: 18 October 2026