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Based on official Alabama exam questions

Alabama CDL Air Brake “Endorsement” Practice Test 2 2025

  • Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements.

Semi-trucks, tractor-trailers, and full-size buses are equipped with air brake systems to provide the force needed to stop while transporting significant amounts of weight. The Yellowhammer State requires drivers operating vehicles equipped with air brakes to exhibit the knowledge and skills necessary to understand the inner workings of their components and how to safely use them. Unless restrictions on using air brakes are removed from your Alabama Commercial Driver’s License (CDL), your driving opportunities will be limited. A thorough knowledge of the air brake system is essential to keeping you, your passengers, and fellow motorists safe. Therefore, it is crucial to receive comprehensive training on these systems and how to operate them.

Our Alabama DMV CDL air brake “endorsement” practice test provides expertly designed instruction that you can rely on to prepare for the official knowledge test. While you will also be required to physically inspect and identify the parts of an air brake system, you must correctly answer at least 80% of the 25 questions on the official Air Brakes knowledge test to pass. The practice test provides an initial assessment of your proficiency level using 30 questions similar to the ones on the official knowledge test. You will get a clear picture of the information you must better understand to achieve the required score. The practice test gives you the blueprint that leads you to success. You will possess the skills and confidence to pass the official knowledge test on your first attempt.

This Alabama DMV CDL air brake “endorsement” practice test outperforms any traditional study method you may consider using. For instance, study guides merely train you to memorize the answers to the questions. This approach can be frustrating because it limits you to learning surface knowledge, which isn’t sufficient to develop a complete understanding of the air brake system. If you expect to be able to answer complex questions, an in-depth knowledge of this system is essential. The practice test is based on the most recent Alabama DMV CDL manual (Alabama CDL Handbook 2025) and is up to date as of November 2025. If you get a question wrong, you’ll receive a detailed explanation of the correct answer, using information from the CDL manual. The practice test is the most effective and time-efficient way for you to eliminate your misunderstandings. You will be able to understand the logic that supports the correct answers and apply it to your driving practices. Using the practice test, you won’t need to spend valuable time consulting additional resources to correct your wrong answers. The practice test puts the information you need at your fingertips and helps you overcome your learning obstacles.

If you’re launching a career in Rocket City, you’ll find the sky’s the limit for your potential with the superior driving skills you develop using the practice tests at https://driving-tests.org/alabama/.

7 min to complete
Available in EN and ES
AL commercial driver's license
Real exam-style pitfalls you’ll practice:
Common Traps
Distractors
Trick Wording
Double Negatives

Authored and curated by Steven Litvintchouk, M.S.

Chief Educational Researcher (ACES member)
Methodology & Editorial Policy
Last verified for accuracy: November 2025 (reviewed weekly)

What to expect on the actual AL permit test

25

questions

20

correct answers to pass

80%

passing score

More AL CDL test resources

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