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Updated for December 2024
Based on 2024 HI commercial driver's license manual

Free Hawaii CDL Air Brakes Test 2024

Today, you will be answering multiple-choice questions that will allow you to become a safer driver and more prepared for your DMV CDL air brake exam, which is required so that you can drive a commercial vehicle with air brakes. Each question, based carefully on the Hawaii Commercial Driver License Manual, has a hint and explanation, and we recommend that you read the explanations, as they will make you more knowledgable and ready for future questions on your real DMV exam. Practice as many times as necessary, until you achieve a satisfactory score and you feel calm and ready. Good luck now, and on your future exam!

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

What you need to know

4.5 out of 5 • 4 votes

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 HI DMV exam

questions

correct answers to pass

80%

passing score

Helpful links

HI DMV website

Official Hawaii CDL manual (2024)

List of questions (classic view)

Spring brakes are
How would you check your truck's slack adjusters?
An anti-lock braking system (ABS)
Which of the following is NOT part of the braking process when driving a tractor-trailer combination vehicle with an anti-lock braking system (ABS)?
Under which conditions are front wheel brakes good?
At what measurement is the safety valve USUALLY set to open?
Which of the following will be true about your brake function if your anti-lock braking system (ABS) fails?
The tractor protection valve
Which of the following is NOT part of the air brake system?
When should you drain your air tanks?
After the initial drop, the maximum acceptable leakage rates per minute are
What is the best way to test your vehicle's low air pressure warning signal?
The purpose of a supply pressure gauge is
Which of the following are true about a dual air brake system?
If the air tanks are not drained,
Which of the following should you do before leaving your vehicle unattended?
Which of the following can cause brakes to fail or fade?
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?
How do brakes work on a long, steep downgrade?
When should you use the parking brake?
Why must you study air brakes in the state of Hawaii?
Slack adjusters are
How can you tell if your vehicle is equipped with an anti-lock braking system (ABS)?
Which of the following is NOT part of the drum brake?
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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HI CDL Air Brakes Test (you are here)

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Explore our rigorous, multi-tiered verification process that ensures each question mirrors the official manual for unparalleled accuracy.

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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Our in-house editor, Steven, who has extensive experience in driver education, crafts each question with precision. He conducts a thorough review of each question against the official manuals to ensure accuracy.
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