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View All PlansThere are three classes of Commercial Driver’s Licenses (CDLs): Class A, Class B, and Class C. A Class A CDL allows you to operate combination vehicles 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. To drive semi-trucks (including flatbeds) or tractor-trailers, this is the class of CDL you should obtain.
To obtain a CDL of any class, you must pass a medical examination, a General Knowledge test on the general theory of commercial driving, and a skills test to show that you can operate commercial motor vehicles of that class safely.
You’ll likely have to pass some other official knowledge tests as well, depending on the class of CDL you’re applying for and the types of vehicles you plan to drive in your career. To drive combination vehicles, you’ll have to pass the Combination Vehicles knowledge test.
The questions on both the General Knowledge test and the Combination Vehicles knowledge test are based on the official Kentucky Commercial Driver License Manual (Kentucky CDL Handbook 2025). However, if you’ve had trouble absorbing the information presented in this study guide, we can help.
This free Kentucky CDL Combination practice test you’re about to take 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 practice questions and answers on such topics as combination braking systems, combination driving techniques, coupling and uncoupling, and pre-trip inspections. If you get stuck on a question, use the available hint. If you still miss a question, read the explanation of the correct answer carefully so you’ll know what to answer the next time. You can also ask our automated assistant for even more help. With us, there’s no time limit; take all the time you need to learn and master the material covered by this practice test. You can even use the practice test as an open-book exam: Keep the official CDL manual open while you take the practice test. You’ll learn more by looking up the correct answer to a puzzling question than by just guessing the answer.
And once you get a CDL of the appropriate class and any endorsements you need, profitable opportunities may await you in several of Kentucky’s economic sectors, such as agriculture (including poultry, corn, soybeans, apples, beef cattle, and tobacco), manufacturing (especially cars and trucks), and logistics (especially UPS Worldport).
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Last verified for accuracy: November 2025 (reviewed weekly)
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