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View All PlansFree 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 October 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.
- Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
- Triple-checked for accuracy
What you need to know
What to expect on the actual OR DMV exam
questions
correct answers to pass
passing score
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