OR CDL Air Brakes Practice Test 4 2025

You’ve come to the right place for a dependable way to pass your Oregon DMV CDL Air Brakes Knowledge Test on your first try. In Oregon, if you do not pass this test, an “L” restriction remains on your CDL, blocking you from operating commercial motor vehicles equipped with air brakes. That restriction will constitute a huge impediment to potential job opportunities, as most CMVs, from logging trucks to tractor-trailers, depend on air brake systems. If you fail, you will face a minimum one-day waiting period and an additional fee before retesting. Our Oregon CDL Air Brakes Practice Tests mimic the official test format and include multiple added features (described below) to help ensure you pass the exam on your first attempt.

To pass the official multiple-choice exam, you must score a minimum of 80%. Our CDL Air Brakes Practice Tests fully align with the most recent state requirements and are based largely on the state’s official CDL Manual. Our practice tests provide real-time AI-driven feedback as well as an interactive CDL Manual to help strengthen retention and speed learning. Each question targets material used on the official exam, removing the fluff often found in other study guides and programs. We also have a revolutionary Challenge Bank that remembers missed questions and asks them again until you have successfully answered them, further ensuring you are fully prepared for the official exam. Once you’ve aced this practice test, check out another one here: https://driving-tests.org/oregon/or-cdl-air-brake-practice-test/.

Routes such as I-5 (connecting Portland, Salem, and Eugene), I-84 through the Columbia River Gorge, US-26, and OR-58 near Willamette Pass require the braking stability of air brake systems, especially at high elevations or during inclement weather. The Beaver State’s economy depends heavily on air brake-qualified drivers. One of the nation’s leading timber and logging producers, Oregonis a lucrative area of the country for commercial drivers. Major sectors, including agriculture, advanced manufacturing, education, logistics, and transport, require this qualification. Major companies, like FedEx, FlixBus, Greyhound, Intel, Nike, Old Dominion, Schneider National, TriMet, and UPS, regularly hire air brake-qualified drivers.

While you’re at it, endorsements such as T – Doubles/Triples, N – Tank Vehicles, H – Hazardous Materials, and X – Tank and Hazmat Combined increase your marketability and should be considered. Check out our Endorsement Practice Tests to get started: https://driving-tests.org/oregon/or-cdl-hazmat-practice-test/. Also, consider preparing for the Combination Vehicles Knowledge Test (one of the requirements needed to obtain a Class A License). We have practice tests for that, too: https://driving-tests.org/oregon/or-cdl-combination-test/.