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It's a practice test that's automatically made up of all your missed questions. Once you finish this test, you’ll be able to revisit your Challenge Bank™ to practice and sharpen your skills.
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View All PlansThe official Commercial Driver License Manual (Delaware CDL Handbook 2025) is a comprehensive resource published by the DMV. It describes the various aspects of commercial driving theory, which you must learn before you can begin a career in this field. You will study safe driving practices, pre-trip inspections, emergency procedures, and the licensing process. Although this manual includes everything you need to know to pass your theory exams, there are other online tools that are more efficient.
If you are interested in driving combination vehicles, you can use our Delaware CDL Combination Vehicles Practice Tests to prepare for the official combination vehicles knowledge exam. You’re about to take the fourth practice test in this series, consisting of 25 multiple-choice questions. All questions are based on the official Commercial Driver License Manual (specifically Section 6: Combination Vehicles) and are similar to the ones you will encounter at the DMV location.
Too many students fail their theory exams simply because they are rushing. It is easy to make mistakes under the pressure of a countdown. Most of our practice tests are untimed, including this one. Whether it takes you minutes or hours, you can finish each training session at your own pace. Loss of internet connection and power outages can happen unexpectedly. This practice test saves your progress in real time, so you don’t have to worry about starting over. As long as you’re not in private browsing mode (such as Incognito mode in Google Chrome), you can continue the interrupted session from the last question answered.
To support your learning, we provide a detailed explanation for each question. This feedback will be instantly revealed after you select an answer, giving you helpful insight. You should note it in a notebook or notebook app and revisit the material during future practice sessions.
Commercial driving theory is a complex subject, especially for beginners new to this field. Your first exam in the licensing process will be the official general knowledge test, which you must pass with a score of 80% or higher. Our Free Delaware CDL Permit Practice Test can help you ace it on your first attempt, but you must use it consistently throughout your learning phase.
Chief Educational Researcher, Driving‑Tests.org (ACES member)
Verified for accuracy December 2025
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