Flashcard 14 - Air Brakes Flashcard Set for the CDL


The correct answer is:

Overusing the brakes causes heat to build up. Heat build-up causes brake drums to expand. Expanding brake drums move away from the brake pads. This reduces effectiveness.


Overusing the brakes usually occurs on long down-hill runs. Excessive heat build-up can also cause permanent, long-term damage to the brake shoes, pads, or linings.

All Flashcard Sets for the CDL are now available as downloadable PDFs