Arizona Air Brakes CDL Practice Test

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Study for the Arizona Air Brakes CDL Test. Master the air brake system concepts with flashcards and multiple choice questions, each complemented by hints and explanations. Get exam ready!

Practice this question and more.

When should you avoid using parking brakes?

If the air pressure is low
On a steep hill
In cold weather
When the brakes are hot

The correct answer is: When the brakes are hot

Using parking brakes when the brakes are hot is a situation to avoid because hot brakes can cause the brake components to warp or get damaged. When brakes are engaged while still hot, the heat can lead to the formation of a binder that may fuse the brake shoes to the drums or the pads to the rotors. This can make it difficult to release the brake later and could potentially lead to more extensive repair needs. It's important to ensure that brakes have cooled down adequately before applying parking brakes, especially after long stretches of driving or heavy braking. This practice helps maintain the integrity of the brake system and ensures the vehicle can operate safely the next time it is in use.