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If 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.
M.S., Chief Educational Researcher (ACES member)
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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.
Driver’s Ed is - nobody wants to set foot inside the DMV. That’s why millions of learners trust us for simple, visual, effective prep.
We are an officially recognized FMCSA Entry-Level Driver Training provider and a proud partner to over 2,500 libraries. We work with safety organizations like GHSA and the National Safety Council to help create safer roads for everyone.
Our trademarked system automatically saves questions you miss, creating personalized tests that target your weak spots until you’ve mastered the material.
Get smarter as you study. Our new AI-powered feedback provides detailed, question-level insights to help you understand the why behind each answer.
Go beyond the boring black-and-white manual. Our interactive handbook lets you read, listen with an MP3 audio version, or even chat with it to find the information you need, faster.
We build our practice questions from the current 2026 DC Driver Handbook and refine them using patterns recent test‑takers report.
Driver handbook • Knowledge‑test/permit overview • Fees & ID requirements • Office/appointment info
We mirror recurring themes (e.g., right‑of‑way traps, sign look‑alikes) and use similar distractors and wording styles.
We don’t collect or publish actual test items and we’re not affiliated with DMV.
