PassMyDMV

Colorado CDL Practice Test

Free practice questions for the Colorado commercial driver license written exams — general knowledge, air brakes, combination vehicles, and every endorsement.

Colorado's DMV written test is designed to ensure all drivers understand traffic laws, safe driving practices, and road safety. The test covers information contained in the official Colorado Driver's Manual and applies to standard car licenses, motorcycle endorsements, and commercial driver licenses (CDL). What makes Colorado distinctive is its @Home online testing option, allowing you to take the knowledge test remotely from your own computer, in addition to the traditional in-person testing at DMV offices. The test questions on PassMyDMV are drawn directly from the official state driver manual, giving you authentic practice that prepares you for the real exam.

About this section of the Colorado test

Colorado's Commercial Driver License program includes a base CDL knowledge test covering vehicle operation, safety, and federal regulations. Additional endorsements are available for HazMat, Tanker, Passenger, Doubles/Triples, School Bus, and Air Brakes. Each endorsement may require a separate knowledge test. CDL applicants must be at least 21 years old and hold a valid instruction permit before taking the skills test.

Start practicing

Open the Colorado practice test — pick car, motorcycle, or CDL, then drill quick quizzes or full simulated exams.

Read the source manual

Browse the official Colorado driver manual — every practice question deep-links to the page that explains the rule.

Frequently asked questions

How many questions are on the Colorado permit test?
The Colorado permit test consists of 25 multiple-choice questions covering traffic laws, safe driving practices, and road signs from the official Colorado Driver's Manual.
What's the passing score for the Colorado written test?
You must score at least 80% on the Colorado permit test, which means you need to answer at least 20 out of 25 questions correctly to pass.
How much does the Colorado written knowledge test cost?
The standard DMV fee is approximately $11.50. If you take the test through the @Home online option, there's an additional $5 testing fee plus $1.50 for credit card processing, totaling around $6.50 for the online option.
How old do I have to be to take the Colorado permit test?
You must be at least 15 years old to apply for an instruction permit and take the knowledge test in Colorado. You must be at least 16 years old to apply for a driver's license.
Can I take the Colorado DMV test in Spanish or other languages?
Yes, Colorado offers the DMV written test in multiple languages including Spanish, French, German, Italian, Japanese, Korean, Chinese, Russian, and Vietnamese, though not all languages may be available at every DMV office. Check with your local office ahead of time.
How many times can I retake the Colorado written test?
You can retake the Colorado written test if you fail. While the exact number of allowed retakes isn't strictly limited, you can attempt the test again after your first failure. Check with your local DMV office for specific retake policies.
Is the Colorado permit test online or in person?
Colorado offers both options. You can take the test in person at any Colorado driver license office, or you can use the @Home online testing platform to take the test remotely from your own computer.
What documents do I need to bring to the Colorado DMV?
You'll need proof of identity (such as a birth certificate or passport), proof of Social Security number (Social Security card or W-2), two documents proving your Colorado residency (dated within the last year with your current address), and a completed application. Original documents or certified copies are required.

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