All your missed questions are saved
automatically for extra practice.
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.
View All PlansAdding difficult questions to Challenge Bank™ is an exclusive Premium feature. Unlock access to 650+ exam-like questions, a Pass Guarantee, personalized study plans, and more.
View All Plans| 90-100 | => | 0% |
| 80-89 | => | 0% |
| 70-79 | => | 0% |
| 60-69 | => | 100% |
| <60% | => | 0% |
Becoming a commercial driver in the District of Columbia takes dedication and careful preparation. You’ll face unique challenges that are not seen anywhere else in the country. Federal security zones have restricted access, while motorcades cause sudden road closures. At the start of your shift, you must plan your route carefully. Check for planned public gatherings, verify bridge height and weight limits, and follow real-time traffic updates to avoid delays and ensure a safe delivery.
There’s no room for error when you’re behind the wheel of a semi-truck. Operating combination vehicles requires superior driving skills, which can only be acquired through consistent practice. The official Commercial Driver License Manual (District of Columbia CDL Handbook) will help you build a solid foundation for your dream career. This resource discusses commercial driving theory in detail. You will learn about safe driving practices, hours of service regulations, and the various endorsements you can add to your CDL. Please pay special attention to Section 6 (Combination Vehicles) and read it multiple times during your learning phase.
Federal Motor Carrier Safety Administration Provider
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
The most determined students adopt a smarter approach and incorporate practice tests into their study routine. We offer a series of practice tests specifically designed to help you pass the official combination vehicles knowledge exam. This District of Columbia CDL Combination Vehicles Practice Test is available for you to use anytime, anywhere in the world. It consists of 25 multiple-choice questions, which you can answer at your own pace.
In the top-right corner of the page, you will find the test settings menu. From here, you can toggle several features, switch the language, and change the font size by adjusting the slider. The “Shift + ?” key combination will display a complete list of keyboard shortcuts you can use. Add flexibility to your study sessions by using these shortcuts at your convenience.
Start today and train with our practice tests whenever your schedule allows. Whether it takes you weeks or months to master commercial driving theory, it is crucial to avoid rushing. You can also check out our Free District of Columbia CDL Permit Practice Test, which can help you ace the official general knowledge exam on your first attempt.
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.
Driving-Tests.org is officially listed in the FMCSA Training Provider Registry (TPR) as an approved ELDT training provider.
You can verify our listing yourself at tpr.fmcsa.dot.gov - search for "Driving-Tests" in the Provider Name field, then click the "Online" tab.
Verify at tpr.fmcsa.dot.gov
