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Alabama CDL Practice 12

Practice 12 for CDL Exam learners in Alabama: 25 questions, explained answers, and a review routine.

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Question 1

1

During a pre-trip inspection, a driver runs the engine and lets air pressure build to governor cutout. What is the driver checking by then applying the brakes and watching for pressure loss?

Question 2

2

With the engine off and a fully charged air system, a driver applies and holds the foot brake for one minute. For a single vehicle, what is the maximum allowable air pressure drop during this test?

Question 3

3

What does ABS (Antilock Braking System) do on a commercial motor vehicle?

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