Flashcard 14 - Air Brakes Flashcard Set for the CDL

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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.


Explanation:

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.

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