Air Brake Coach
System partsQuestion 8 of 116

How can you identify the supply tank on a vehicle?

  1. Look for the largest tank
  2. Look for the yellow button
  3. Look for the safety valve
  4. Look for the oil drain
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Correct answer: Look for the safety valve

The safety valve is on the supply tank. It helps you find that tank.

Source: Air Brake Manual: A Guide for Instructors (Government of Alberta, Alberta Transportation, March/April 2012), Module 3: Supply circuit, page 45

Practice system parts

Questions last reviewed: 18 October 2026