Free Arizona CDL Air Brakes Test 2024

Today, you will have the opportunity to answer 30 multiple-choice questions about air brakes in order to prepare for the DMV commercial driver exam on air brakes and to become a safer driver.

These questions have been carefully written based on real DMV questions, as well as information from the Arizona Commercial Drivers License Manual and applicable Arizona laws. Along with each question, you will find a hint and explanation. To prepare for the real DMV exam, it is recommended that you read each explanation as this will help you have a better understanding of the material discussed.

Good luck today on your air brake test, and keep driving safely!

Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
Triple-checked for accuracy

What you need to know

9 min to complete

Available in EN and ES

Verified by Steven Litvintchouk, M.S., Chief Educational Researcher, Member of ACES. See our detailed commitment to accuracy and quality in our practice tests.

What to expect on the actual AZ MVD exam

questions

correct answers to pass

80%

passing score

Helpful links

AZ DMV website

List of questions (classic view)

How would you check your truck's slack adjusters?
Which of the following are true about a dual air brake system?
Why must you pass a knowledge test on air brakes?
Slack adjusters are
Spring brakes are
How do brakes work on a long, steep downgrade?
Which of the following is NOT part of the drum brake?
Which of the following is NOT part of the braking process when you're driving a tractor-trailer with an antilock braking system (ABS)?
At what measurement is the safety valve USUALLY set to open?
When should you use the parking brake?
After the initial pressure drop, the maximum acceptable leakage rates per minute are
What is the best way to test your vehicle's low air pressure warning signal?
Which of the following should you do before leaving your vehicle unattended?
The tractor protection valve
What is the best way to test if your vehicle's spring brakes come on automatically?
Which vehicles must have low air pressure warning signals?
Which of the following is NOT part of the air brake system?
Which of the following can cause brakes to fade or fail?
How can you tell if your vehicle is equipped with an antilock braking system (ABS)?
An antilock braking system (ABS)
Which of the following will be true about your brake function if your antilock braking system (ABS) fails?
The purpose of a supply pressure gauge is
When should you drain your air tanks?
If the air tanks are not drained,
Under which conditions are front wheel brakes good to use?
The low air pressure warning signal will come on before the pressure in the air tanks falls below
A low pressure warning signal is required on
All vehicles equipped with air brakes have
With air brake-equipped vehicles, the parking brakes should be used
The use of air brakes on a downgrade is only a supplement to the

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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.
Community Feedback Integration:
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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