– / –

Ask DMV Genie AI

new

Free Oregon CDL Air Brakes Test 2025

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

You have come to the right place for a sure-fire method of passing your Oregon DMV CDL Air Brakes Knowledge Test on your first attempt. Without passing the knowledge test, your CDL will include the restriction “L,” preventing you from operating commercial motor vehicles (CMVs) with air brakes. Securing a CDL without this restriction is vital for expanded job opportunities in Oregon because most semi-trucks and tractor-trailers rely on air brakes. Failing the air brakes test in Oregon results in a one-day waiting period and a retest fee should you decide to retake the test. Use our Oregon DMV CDL Air Brakes Practice Tests to pass on the first attempt.

The steep grades, sharp curves, and elevation changes in the Cascade Mountains, the coastal range, and the high desert areas demand air brakes for brake reliability. The wintry mountain passes are especially challenging and need air brake-qualified drivers. Key transportation routes include I-5 (connecting Portland, Salem, and Eugene), I-84 (winding through the Columbia River Gorge), US-26 (major east-west route), and OR-58 (with its steep descents and curves, particularly near Willamette Pass). As most semi-trucks and tractor-trailers rely on air brakes, restriction “L” would severely limit your job opportunities.

The Beaver State relies on drivers with the air brake qualification in key industries, including timber and logging (one of the largest lumber producers in the U.S.), agriculture, and technology and manufacturing (Intel and Nike). Other major companies requiring this qualification include Schneider National (Portland), Old Dominion Freight Line, FedEx, and UPS as well as TriMet (Portland), Greyhound, and FlixBus in the public transit and charter bus industries. School districts across Oregon also employ thousands of full-size school bus drivers and require the air brake qualification.

Our CDL Air Brakes Practice Tests cover everything needed for the official DMV Air Brakes Knowledge Test. What you learn will also help you practice inspecting and operating CMVs to pass your skills test. The written Air Brakes knowledge test features multiple-choice questions based on the state’s CDL manual (Oregon CDL Handbook 2025) and requires a score of at least 80% to pass.

Our Practice Tests mimic the official knowledge test and offer real-time feedback on all responses. This scientifically proven approach helps you learn faster and ensures you pass the test.

4.33 out of 5 • 6 votes.

9 min to complete

Available in EN and ES

Pass the first time,
guaranteed with Premium

All 650 exam-like questions
specific to your state

Interactive learning with
AI personal tutor

Unique 360° Virtual Road
Simulations

Get your money back if you
don’t pass

What to expect on the actual OR DMV exam

questions

correct answers to pass

80%

passing score

Helpful links

OR DMV website

Official Oregon CDL manual (2025)

More OR DMV Written Exam Resources

OR CDL Air Brakes Test (you are here)

Are you in another state?

Alabama: Test 1 / Test 2
Alaska: Test 1 / Test 2
Arizona: Test 1 / Test 2
Arkansas: Test 1 / Test 2
California: Test 1 / Test 2
Colorado: Test 1 / Test 2
Connecticut: Test 1 / Test 2
Delaware: Test 1 / Test 2
District of Columbia: Test 1 / Test 2
Florida: Test 1 / Test 2
Georgia: Test 1 / Test 2
Hawaii: Test 1 / Test 2
Idaho: Test 1 / Test 2
Illinois: Test 1 / Test 2
Indiana: Test 1 / Test 2
Iowa: Test 1 / Test 2
Kansas: Test 1 / Test 2
Kentucky: Test 1 / Test 2
Louisiana: Test 1 / Test 2
Maine: Test 1 / Test 2
Maryland: Test 1 / Test 2
Massachusetts: Test 1 / Test 2
Michigan: Test 1 / Test 2
Minnesota: Test 1 / Test 2
Mississippi: Test 1 / Test 2
Missouri: Test 1 / Test 2
Montana: Test 1 / Test 2
Nebraska: Test 1 / Test 2
Nevada: Test 1 / Test 2
New Hampshire: Test 1 / Test 2
New Jersey: Test 1 / Test 2
New Mexico: Test 1 / Test 2
New York: Test 1 / Test 2
North Carolina: Test 1 / Test 2
North Dakota: Test 1 / Test 2
Ohio: Test 1 / Test 2
Oklahoma: Test 1 / Test 2
Oregon: Test 1 / Test 2
Pennsylvania: Test 1 / Test 2
Rhode Island: Test 1 / Test 2
South Carolina: Test 1 / Test 2
South Dakota: Test 1 / Test 2
Tennessee: Test 1 / Test 2
Texas: Test 1 / Test 2
Utah: Test 1 / Test 2
Vermont: Test 1 / Test 2
Virginia: Test 1 / Test 2
Washington: Test 1 / Test 2
West Virginia: Test 1 / Test 2
Wisconsin: Test 1 / Test 2
Wyoming: Test 1 / Test 2

Unlock full access with Premium

Our commitment to accuracy and quality in our practice tests

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.
Expert Content Creation:
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.
Rigorous Review Process:
Once Steven has finalized a set of questions, our team conducts a joint review session. This second level of scrutiny involves content accuracy, proofreading, and fact-checking to eliminate any errors.
User Feedback Mechanism:
After a question goes live on our site, we keep the lines of communication open. Each question features a feedback button, inviting users to report any issues or errors. This continuous feedback loop allows us to address and rectify any concerns promptly.
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.

FREE Oregon CDL Air Brakes Test

Our Practice Tests mimic the official knowledge test and offer real-time feedback on all responses. This scientifically proven approach helps you learn faster and ensures you pass the test.

Show Test description

Pass the first time, guaranteed

You test results are ready

Pass Your CDL Exams the First Time – Guaranteed

You’re moments from your results. Before viewing them, see how you can get your ELDT certificate and pass — at a fraction of what schools charge.

1,500 Real Exam‐Like Questions Covers every endorsement plus a Pass Guarantee.
FMCSA‐Approved ELDT Official certification, instant completion reporting.
99.06% Pass Rate vs. 49% Avg Trusted by over 1.15 million drivers to succeed first time.