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View All PlansIf you ever wanted to drive a combination vehicle in the capital of the United States, now is your chance to make this dream a reality. With a Class A Commercial Driver’s License (CDL), you’ll find plenty of employment opportunities in the District of Columbia. Before you can cross the Potomac in a heavy 18-wheeler, you must complete the licensing process. In DC, the Department of Motor Vehicles (DMV) requires all aspiring commercial drivers to pass several exams.
The official general knowledge test has 50 multiple-choice questions. This test is based on the official District of Columbia Commercial Driver License Manual (District of Columbia CDL Handbook), a comprehensive resource that discusses commercial driving theory in detail. A minimum score of 80% is required to pass. To ace this exam on your first attempt, we recommend training with our Free District of Columbia CDL General Knowledge Permit Practice Test.
You must pass the official combination vehicles knowledge exam and complete your CDL skills tests in a combination vehicle in order to legally operate combination vehicles. This exam includes 20 questions based on Section 6 (Combination Vehicles) of the official commercial driver license manual.
This practice test can help you master this subject within a few weeks. When used regularly, it can significantly boost your learning potential. You get unlimited attempts and 24/7 access to train as often as your schedule allows. Access this practice test on any compatible device that supports a browser and begin your training right away. If you make a mistake, we will immediately point it out so you’ll know what went wrong. A detailed explanation will be provided, explaining the reasoning behind the correct answer. Please note this feedback in a notebook or notebook app for future reference.
Commercial driving theory is not rocket science, but this complex subject often confuses beginners who are unfamiliar with its rules and regulations. As you begin your learning phase, it is highly recommended to proceed at your own pace. Please avoid rushing and dedicate the following weeks to mastering this subject. Success in this career takes more than a passing score. You must be prepared to take on the responsibilities of this job and ensure your cargo is delivered safely.
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Last verified for accuracy: November 2025 (reviewed weekly)
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