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View All PlansIn the United States, there are three main classes of Commercial Driver’s Licenses (CDLs): Class A, Class B, and Class C. A Class A CDL allows you to operate a combination vehicle with a gross combination weight rating (GCWR) of 26,001 pounds or more, provided the towed vehicle(s) has a gross vehicle weight rating (GVWR) of more than 10,000 pounds. This class of CDL is typically for operating semi-trucks and tractor-trailers.
No matter which class of CDL you plan to get, you must meet a series of requirements. For one, you must pass an official skills test in a vehicle that is representative of the CDL class you’re applying for. The skills test includes basic vehicle maneuvers, a pre-trip inspection, and a road test. To be sure of passing the skills test, you must practice commercial driving under supervision until you’re proficient. And to be allowed to practice commercial driving, you must hold a Commercial Learner’s Permit (CLP).
To obtain a CLP, you must also meet certain requirements, including passing the official General Knowledge test on the basic theory of commercial driving. The questions on this test are based on the official Alabama Commercial Driver License Manual (Alabama CDL Handbook 2025).
To practice operating combination vehicles (as well as operate them for a living), you must also pass the official Combination Vehicles knowledge test to show that you understand the basic theory of operating combination vehicles. The Combination Vehicles knowledge test is also based on that same study guide. Hence, you should read the manual several times to learn as much as you can from it. But if you’ve found it tough to learn enough from the manual, you probably need some more help.
This free Alabama CDL Combination practice test is based on the official CDL manual, just like the official Combination Vehicles knowledge test. It’s up to date as of November, 2025. There are 25 multiple-choice questions and answers on such topics as combination braking systems, combination driving techniques, coupling, and pre-trip inspections. Our automated assistant can give you a hint if you get stuck or an explanation of the correct answer if you still miss the question. There’s no time limit; take all the time you need to learn and master the material covered by this practice test. Take the practice test as an open-book test if you wish. If you get stuck on a question, try to look up the correct answer in the CDL manual. You’ll learn more that way than by random guessing.
Be sure to try our other CDL Combination Vehicles practice tests too.
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Last verified for accuracy: November 2025 (reviewed weekly)
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