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Colorado CDL Class A Practice Test 2025

Average pass rate for CDL tests in Colorado: 62%.
Average pass rate for this test: 47%.
Hard
10 min
Score distribution:
90-100=>0%
80-89=>17%
70-79=>17%
60-69=>17%
<60%=>50%
Avg. first-try score: 50%

Are you ready to begin your commercial driving career in Colorado? Before you may apply for a Commercial Driver’s License (CDL), you must first get a Commercial Learner’s Permit (CLP). This process involves submitting proof of identity and Colorado residency, passing a vision test, and completing a DOT medical exam to operate in non-excepted commerce. One of the most important steps in the licensing process is passing the official written general knowledge exam, a 50-question test based on the official Colorado Commercial Driver License Manual (Colorado CDL Handbook 2025).

For a Class A CDL, you must also pass the official combination vehicles knowledge test. We also recommend passing the air brakes knowledge exam, as most commercial vehicles use air brake systems. Entry-Level Driver Training (ELDT) is a federal requirement mandated by FMCSA in all U.S. states and the District of Columbia. You must complete this training from a provider listed in FMCSA’s Training Provider Registry (TPR).

Colorado CDL Class A Practice Test 2025
Commercial Driver's License
Based on the official CO CDL HandbookHandbook‑based (2025) + exam‑taker feedback
14 CO students practicing now
• 164 completed today
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

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

About the Colorado CDL

Mastering commercial driving theory doesn’t happen overnight. It requires repetition, understanding, and access to efficient tools that can boost your learning potential. Our Colorado CDL Class A Practice Test is an intuitive tool designed to help you become a better commercial driver. Its content and format closely reflect the official written knowledge exams, helping you prepare in advance. We update this practice test regularly (most recently for December 2025) to reflect the latest updates brought by DMV rules or state law. You will always practice with the latest version, but we recommend checking the official CO DMV website for the most up-to-date information.

With unlimited attempts and 24/7 access, there’s no limit to how often you can train with this practice test. You can use it while commuting to work, waiting in line, or after dinner. Start today and dedicate the following weeks to your learning phase. Keep track of your scores and watch your performance naturally improve with time.

We know what it takes to pass. And we’ve got the proof.

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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.

A smarter way to study

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Our trademarked system automatically saves questions you miss, creating personalized tests that target your weak spots until you’ve mastered the material.

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Interactive handbook

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.