IA CDL Air Brakes Practice Test 2025

Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
Based on 2025 IA commercial driver's license manual
Triple-checked for accuracy
Updated for March 2025

Do not make the mistake of going to the DMV to get your Iowa Air Brakes endorsement without doing practice tests first. Practicing will give you the confidence and knowledge you need to move through the test with ease. Then, you will be certain to receive your endorsement and advance your career. Your endorsement will open up doors that have been closed previously. Just remember, it all begins with your endorsement, and a practice test makes it much easier to get that endorsement.

What to Expect with the Practice Test
Due to the fact that the Iowa Air Brakes practice test is designed from the official Iowa CDL manual, the questions closely resemble the questions you will find on the authorized CDL test. The wording might be somewhat different, but the meaning is the same. The practice test has 25 questions. Once you master these questions, you will be ready to move onto the official CDL test at the DMV.
As you take the test, it is important to make a note of the questions that you have problems with so you can study them after you finish the practice test. That way, you will be able to improve before you have to take the official test. Then, go back and retake the test to see if you get those answers correct. Keep doing this until you are ready to take the actual thing.

Getting Ready on Test Day
When test day finally arrives, you might have some jitters. That is perfectly fine, but don’t let your nerves get the best of you. The best thing to do is to take your Air Brakes practice test one more time. Then, you will remember that you have the knowledge necessary to pass with flying colors Sometimes, a boost of confidence is all that you need to bring home your IA Air Brakes endorsement.
Good luck on your practice test, and remember, you can take it as many times as you would like. Don’t rush the process. The practice test is here to help you as you move closer to getting your endorsement. Use it as a tool to help you achieve your goals.

7 min to complete

Available in EN and ES

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What to expect on the actual IA DOT exam

questions

correct answers to pass

80%

passing score

Helpful links

IA DMV website

Official Iowa CDL manual (2025)

More IA DOT Written Exam Resources

IA CDL Air Brakes Test

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Written by Andrei Zakhareuski Updated over a week ago

At Driving-Tests.org, we understand the importance of reliable and accurate practice tests to help you prepare for your DMV exam. That's why we've developed a meticulous process to create and continually update our practice questions, ensuring they reflect the most current driving laws and regulations.

Here's an inside look at how we maintain the highest quality in our practice tests.

Content Creation and Verification Process

Alignment with Official Manuals:
Every question we develop is based on the most recent version of each state's official driving manual. Our team regularly monitors each state DMV's website for the latest updates to ensure our practice tests are always aligned with the most current information.
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We leverage feedback from our vast community of users to understand which topics are most frequently tested. This helps us focus on the areas that are most relevant and beneficial for your preparation.
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Responsive Updates:
In line with our commitment to accuracy, we quickly update our practice questions to reflect any changes in the DMV manuals. Additionally, we update the free electronic copy of the state's driver's license manuals on our site, typically within a few days after the DMV publishes them.

Our thorough quality control process ensures that you have access to practice tests that are as accurate and up-to-date as possible. We believe in the power of well-prepared drivers and are dedicated to providing you with the best study tools to help you succeed on your DMV exam.

IA CDL Air Brakes Practice Test

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