MN CDL Combination
Minnesota CDL Combination Vehicle (Class A) Knowledge Test
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ExploreAbout this exam
The Minnesota CDL Combination Vehicle (Class A) knowledge test is the written exam a driver must pass to add the combination-vehicle endorsement area to a Minnesota commercial driver's license. It is intended for drivers who will operate a tractor-trailer or other Class A combination on public roads, whether they are entering the industry, upgrading from a Class B or Class C license, or adding combination authority to an existing CDL. The test is delivered in English and focuses on the knowledge a combination driver needs before the skills test: inspecting and coupling or uncoupling a tractor and trailer, controlling and turning a long vehicle and backing it safely, understanding the air brake and braking systems that hold a combination together, and recognizing skid and hazard situations and the safe operating practices that prevent them. Preparation should center on the official Minnesota CDL manual and the combination-vehicle chapter in particular, followed by repeated practice questions that force you to reason about why a procedure is done a certain way rather than memorizing answers. Verify current test logistics, including question count, time limit, passing score, fee, retake rules, and license validity, directly with Minnesota Driver and Vehicle Services before scheduling, because those details change and are not confirmed here. This page is independent study material and is not affiliated with or endorsed by any state agency.
What you'll study
About MN CDL Combination preparation
What does the Minnesota Class A combination test actually cover?
It covers the knowledge behind operating a combination vehicle: pre-trip inspection and coupling or uncoupling, basic control, turning, lane control and backing, air brakes and braking systems, and skid control, hazard perception and safe operating practices. Expect procedure-and-reasoning questions rather than simple definitions.
How many questions are on the test and what score do I need to pass?
Those figures are not confirmed on this page. Minnesota Driver and Vehicle Services sets the current question count and passing score, and they can change between manual revisions. Check the official DVS CDL materials or ask at the testing station before you schedule so you are not preparing against an outdated number.
How long is the test and is there a fee?
The time limit and any fee are not confirmed here. Testing time and fees are set by the state and vary by transaction type, such as a first application versus adding an endorsement. Confirm both with Minnesota DVS when you book your appointment, and budget extra time for check-in and identity verification.
If I fail, how soon can I retake it?
The retake policy is not confirmed on this page. Retake waiting periods and any additional fees are set by the state, so verify the current rule directly with DVS before assuming you can test again the same day. Plan your study so a single attempt is enough.
How hard is the combination test compared with the general knowledge test?
Most candidates find it more demanding because it tests sequences and cause-and-effect. You need to know the order of coupling steps, what happens if you raise the landing gear too early, and why a trailer swings wide in a turn. Understanding the physics beats memorizing isolated facts.
What is the best study order?
Read the combination vehicle section of the official Minnesota CDL manual first, then the air brake section, since braking questions assume that background. Follow with practice questions grouped by topic, review every wrong answer against the manual, and finish with mixed sets that mimic the real test's random order.
What mistakes cause people to fail?
Common failure modes are confusing the order of coupling and uncoupling steps, mixing up which valve or line does what, underestimating off-tracking and swept path in turns, and guessing on skid recovery. Another frequent problem is studying only practice questions without reading the manual's explanations.
Does passing this test give me a Class A license by itself?
No. The knowledge test is one requirement. You also need to meet eligibility and medical requirements, hold the appropriate learner permit stage where applicable, and pass a skills test in a representative vehicle. Confirm the full sequence and any validity period with Minnesota DVS.
How current is the information on this page?
The Minnesota DPS pages used as sources returned 'Page not found' when retrieved on 2026-11-06, so no exam specifications could be confirmed. All numeric details are left blank and flagged for review. Treat this page as study guidance only and verify every requirement with the official state source.