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View All PlansCO CDL Combination Vehicles Practice Test 2 2025
In Colorado, the Department of Revenue (DMV) publishes the official Colorado Commercial Driver License Manual (Colorado CDL Handbook 2025). Every aspiring commercial driver should read this manual multiple times during their learning phase, as it includes essential information vital to a successful career in this field. The manual also helps you prepare for the theory and skills exams, which are part of the licensing process.
Since most combination vehicles in Colorado have air brakes, it is crucial to learn how they work. To drive commercial vehicles equipped with air brakes legally, you must pass the official air brakes knowledge exam and a skills test in a vehicle with air brakes. If you don’t, your CDL will have an L restriction, and you won’t be allowed to drive vehicles with air brakes.
Our Colorado CDL Combination Vehicles Practice Test, when used regularly, can significantly boost your learning potential. It is preferred by students who seek a better alternative to the official commercial driver license manual. This intuitive tool consists of 25 multiple-choice questions and includes several features. Unlike the official combination vehicles knowledge exam, this practice test is not timed. You have the flexibility to study when and how it suits you best.
All you need is a compatible device, a stable internet connection, and several hours of your time. “Officer Frank,” our automated assistant, will be present during your training sessions. This AI coach can explain the most complex topics in a way everyone can understand. Additionally, “Officer Frank” can give personalized answers to your individual questions, hints, and real-life examples. Learn from your mistakes as soon as they occur with the help of the detailed explanation provided for each question. Please pay attention to this feedback and note it in a notebook or notebook app.
Because this practice test can be used for educational purposes, you can master commercial driving theory while also preparing for the official combination vehicles exam. Begin your training today and dedicate several weeks to your learning phase. During this time, you can also use our Free Colorado CDL Permit Practice Test to reinforce your knowledge.
Verified for accuracy: October 2025
Reviewed by Steven Litvintchouk, M.S.
Chief Educational Researcher (ACES member)
Methodology & Editorial Policy
What to expect on the actual CO permit test
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correct answers to pass
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