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  • 0  (10 mistakes allowed to pass)

CO CDL General Knowledge Exam Simulator 2025

Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements.

Have you always wanted to drive one of those heavy trucks you saw as a kid? Or perhaps the school bus driver inspired you to follow their career path once you grew up. Make your dream career a reality and begin the process of obtaining a Colorado Commercial Driver’s License (CDL) today. Your determination to achieve your professional goals will play a crucial role in this journey, but you must also meet several licensing requirements. To obtain a Commercial Learner’s Permit (CLP), you must obtain a valid DMV Medical Examiner’s Certificate, provide the necessary documentation, pay the license fees, and pass the official CDL General Knowledge (permit) test. This exam consists of 50 questions based on the official Colorado commercial driver license manual (Colorado CDL Handbook 2025). After holding a CLP for at least 14 days and completing Entry-Level Driver Training (ELDT) from a registered training provider, you can schedule and take the CDL skills test.

If you have difficulty understanding the various aspects of commercial driving theory, you should adopt a smarter approach and change your study routine. You cannot become an expert overnight, so we recommend dedicating a few days to understanding the basic concepts and several more weeks to master this subject. Our other CDL practice tests can strengthen your knowledge through active learning, which is more effective than traditional learning methods. When you’re ready, take our Colorado CDL General Knowledge Exam Simulator to see if you can pass the official exam. This intuitive tool has been recently updated for December 2025 and includes the latest updates brought by DMV rules or state law. All 50 questions have multiple answer choices, but only one is correct.

You get unlimited attempts, nonstop access, and the flexibility to practice at your own pace. All you need is a compatible device and a stable internet connection. Your dream career is within reach. We’ll get you there faster with our intuitive tools, but you must put in the time and effort necessary to become a safe and responsible commercial driver. Whether it takes weeks or months, remember there’s no time limit during your learning phase.

Real exam-style pitfalls you’ll practice:
Common Traps
Distractors
Trick Wording
Double Negatives
Commercial Driver's License
Based on official CO exam questions
This test is a Premium member exclusive. You'll get

All 650 exam-like questions specific to Colorado

Interactive learning with AI personal tutor

Unique 360° Virtual Road Simulations

Get your money back if you don’t pass

Steven Litvintchouk, M.S., Chief Educational Researcher at Driving-Tests.org

Authored and fact-checked by Steven Litvintchouk, M.S.

Chief Educational Researcher, Driving‑Tests.org (ACES member)
Last verified for accuracy on
Methodology & Editorial Policy

5 min to complete
Available in EN and ES

What to expect on the actual CO permit test

50

questions

40

correct answers to pass

80%

passing score

Real Colorado drivers who passed first try

Verified student reviews • Shared with permission

Thanks to Driving-Tests.
Org I passed all tests 95 and above. I love driving a school bus! I'm Very happy!
J
Walked in and did General knowledge, air brake, doubles,.
I walked in and did General knowledge, air brake, doubles, triples, tanker, hazmat, school bus and passenger. I did it all on the same day, and I passed with a 97 or 98% something like that. So I was very well prepared and passed the test with ease.
K
Fast and efficient way to prepare for the exam.
Read the CDL manual, then started to re-read more intensely. But, then I came across driving-tests.org. In one afternoon I learned much more than I would have by just re-reading the manual. This was much more efficient and made me comfortable that I can pass any test.
JIC
Best place to get ready for anything cdl.
This hazmat elite training was great for Ms here in colorado I used to for the hazmat elite and for class a and I passed both with ease. My hazmat test at the dmv basically was all the questions from practice test 4 so thank you guys for the great course
J
Using Driving-tests.org made it super simple to study.
I spent maybe 10 hours answering questions. The marathons questions really solidified my knowledge. I definitely did not need to read the handbook. I think I missed 5 on the general knowledge. I missed three on the air brakes and 1 on the combination vehicles. I was able to complete all 3 tests in less than 40 minutes. The agent administering the test was surprised at how quickly I completed the test. She said they have people from trucking schools that spend hours taking the test and most do not pass the first time.
C

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