When should you inspect under the back of the vehicle to verify the air tanks are secure and the air lines are tied up and secure?
- Every time the vehicle is parked
- During a fuel stop
- After every drive
- During the air brake pre-trip inspection ✓
Answer: D. During the air brake pre-trip inspection
You check under the back of the vehicle for secure air tanks and properly tied-up air lines during the air brake pre-trip inspection.
Why this is the answer
The handbook's air brake pre-trip inspection section tells you to check each foundation brake and its related parts, including air hoses and lines, and lists that air lines must be secure, with no leaks, abrasions, cuts, cracks or kinks. Since air tanks and air lines are part of the air brake system, they belong to the air brake pre-trip inspection. The handbook also says you should inspect in the same order every time so you don't miss items, and the pre-trip inspection includes a walk-around circle check.
Why the other answers are wrong
- A. Every time the vehicle is parked — Parking the vehicle is not when the handbook tells you to check the air brake system; these checks belong to the organized pre-trip inspection.
- B. During a fuel stop — A fuel stop is not described in the passages as a time for inspecting air tanks and air lines.
- C. After every drive — The passages describe the pre-trip inspection as the check before operating the vehicle, not something done after every drive.
Remember it
Air tanks and air lines are air brake parts, so they get checked in the air brake walk-around, not whenever you happen to stop.