Free Colorado CDL Practice Tests — Your Complete Study Guide
Pass your Colorado CDL permit exam with 80%+ on the first try
What You Need to Study
General Knowledge
The foundation of your CDL exam. Covers traffic laws, safe driving techniques, vehicle inspection procedures, cargo handling, and federal regulations every commercial driver must understand.
Combination Vehicles
Essential for driving tractor-trailers. Covers coupling and uncoupling procedures, rollover prevention, inspecting combination vehicles, and safely maneuvering with attached trailers.
Air Brakes
Required for any vehicle equipped with air brakes. Covers how air brake systems work, dual air brake systems, inspecting air brakes, and using them safely in all conditions.
Endorsement Tests
HazMat
Required for transporting hazardous materials. Covers placarding, labeling, loading procedures, emergency response, and compliance with federal hazmat regulations.
Tanker
Required for driving tank vehicles used to transport liquids or gases in bulk. Covers safe loading, unloading, and driving techniques specific to tanker operations.
Doubles & Triples
Required for pulling double or triple trailers. Covers coupling and uncoupling multiple trailers, safe driving practices, and inspection procedures for multi-trailer rigs.
Passenger
Required for operating vehicles designed to transport 16 or more passengers. Covers passenger safety, loading, emergency exits, and pre-trip inspection requirements.
What Are You Preparing For?
Select one or more options so we can show you exactly which tests you need to take.
What You Need to Study
General Knowledge
16 sections · 800 questions
The foundation of your CDL exam. Covers traffic laws, safe driving techniques, vehicle inspection procedures, cargo handling, and federal regulations every commercial driver must understand.
Combination Vehicles
9 sections · 180 questions
Essential for driving tractor-trailers. Covers coupling and uncoupling procedures, rollover prevention, inspecting combination vehicles, and safely maneuvering with attached trailers.
Air Brakes
6 sections · 150 questions
Required for any vehicle equipped with air brakes. Covers how air brake systems work, dual air brake systems, inspecting air brakes, and using them safely in all conditions.
Endorsement Tests
Additional endorsements you may need depending on the type of vehicle or cargo you plan to operate.
HazMat
9 sections · 202 questions
Required for transporting hazardous materials. Covers placarding, labeling, loading procedures, emergency response, and compliance with federal hazmat regulations.
Tanker
6 sections · 133 questions
Required for driving tank vehicles used to transport liquids or gases in bulk. Covers safe loading, unloading, and driving techniques specific to tanker operations.
Doubles & Triples
7 sections · 144 questions
Required for pulling double or triple trailers. Covers coupling and uncoupling multiple trailers, safe driving practices, and inspection procedures for multi-trailer rigs.
Passenger
6 sections · 123 questions
Required for operating vehicles designed to transport 16 or more passengers. Covers passenger safety, loading, emergency exits, and pre-trip inspection requirements.
Your Path to a Commercial Driver's License
To get a CDL, you must first study for and pass the permit exam at the DMV. After you receive your permit, you can take commercial vehicle driving classes and complete the required training. The final step is passing the official driving exam to earn your CDL. Our practice tests help you prepare for the DMV permit exam with real-style questions, and we also provide extra study materials and helpful resources to guide you through the process.
To obtain a CDL in Colorado, you must pass three written permit tests — General Knowledge, Combination Vehicles, and Air Brakes — at the Colorado Department of Motor Vehicles. Similar to a regular driver's license permit exam, these are timed, multiple-choice tests based on the official Colorado CDL handbook.
All of our practice material is built from the official Colorado CDL handbook and federal resources, and curated by professionals with over 10 years of experience in the commercial transportation industry. Studying with practice tests that mirror the real exam format is one of the most effective ways to pass on your first try.
On this page you'll find free practice tests for all three sections. For the full question bank and additional study features, download the CDL Help app.
CDL Requirements in Colorado
State DMVState DMVState DMV49 CFR §391.11
- Must be at least 18 years old to apply for a CDL for intrastate (within Colorado) commercial driving. Colorado reduced the eligible age from 21 to 18 for intrastate drivers in 2019.
- Drivers aged 18 to 20 are issued a CDL with a "K" intrastate restriction, limiting them to commercial driving within Colorado only.
- Must be at least 21 years old to operate a non-farm commercial motor vehicle in interstate commerce or to transport hazardous materials.
- Must hold a valid driver's license (Colorado or another state).
- Must provide a Social Security number, proof of physical address in Colorado, and proof of identity.
- Must pass a medical examination and provide a current DOT medical card from an FMCSA Certified Medical Examiner. All DOT medical information is submitted directly to FMCSA's National Registry by the medical provider.
- Must pass the CDL Information System (CDLIS) and National Driver Register (NDR) records checks.
- Must pass the required CDL knowledge tests to obtain a Commercial Learner's Permit (CLP). CLPs are valid for one year and are not renewable. Written test results are valid only for one CLP issuance.
- Must hold a CLP for at least 14 calendar days before taking the skills test.
- Must complete Entry Level Driver Training (ELDT) from an approved school listed on the FMCSA Training Provider Registry.
- Must pass the commercial drive skills test through an approved driving school, documented in CSTIMS.
- Hazardous Materials (H) endorsement requires ELDT, a written exam, and a current TSA background check.
- CDL classes: Class A (combination vehicles 26,001+ lbs GCWR with towed vehicle over 10,000 lbs), Class B (single vehicle 26,001+ lbs GVWR), Class C (vehicles transporting 16+ passengers or hazmat under 26,001 lbs).
- Commercial driver instruction permits are valid for 180 days and may be renewed once for an additional 180 days.
Official Colorado CDL Handbook
The official Colorado Commercial Driver License Manual covers every topic tested on the state's CDL knowledge exam — but its dense, reference-style format makes it difficult for self-study. A more effective preparation tool is our set of General Knowledge practice tests. Our free Colorado CDL permit practice test is structured to closely match the format and content of the official exam and is fully updated as of February 2026. Each test includes 20 questions covering critical topics such as vehicle inspection, safe driving techniques, air brakes, cargo securement, driving emergencies, hazardous conditions, and Colorado-specific commercial driving regulations. Unlike the official test, every practice question comes with a helpful hint and a detailed explanation of the correct answer — so you learn from every question, not just the ones you get right.
- Complete CDL regulations and Colorado-specific requirements
- Safe driving techniques, vehicle inspection, and cargo handling
- All endorsement categories and testing requirements
Non-Domiciled CDL Information
Important information about non-domiciled commercial driver's licenses in Colorado.
Federal regulations on non-domiciled CDLs are changing rapidly. The information below reflects the latest known state actions.
Colorado DMV has paused the issuance and renewals of term-limited (non-domiciled) Commercial Driver's Licenses (CDLs) and Commercial Learner's Permits (CLPs) to temporarily lawfully present residents until further notice, effective September 29, 2025. Colorado was among the states identified by the DOT as needing to pause processing of non-domiciled credentials until evidence of compliance with federal requirements is provided.
Under the FMCSA final rule published on February 13, 2026 (effective March 16, 2026), eligibility for non-domiciled CLPs and CDLs is now restricted to foreign-domiciled individuals holding specific, verifiable employment-based nonimmigrant statuses — specifically H-2A (agricultural workers), H-2B (non-agricultural workers), and E-2 (treaty investors) visa holders. Employment Authorization Documents (EADs) are no longer accepted as proof of eligibility, and State DMVs must use the federal SAVE (Systematic Alien Verification for Entitlements) database to confirm immigration status. This rule aligns the issuance of non-domiciled CDLs with FMCSA's statutory mandate to ensure the fitness of all CMV drivers, restoring the integrity of the CDL system and enhancing public safety.[FMCSA Final Rule]
English Language Proficiency (ELP)
Federal ELP enforcement applies to all CDL holders nationwide.
Federal ELP enforcement applies to all CDL holders nationwide. Here is how it is enforced in Colorado.
Colorado does not currently administer a separate state-level English Language Proficiency (ELP) test for CDL applicants. However, all Colorado CDL holders are subject to federal ELP enforcement, which took effect on June 25, 2025. Under FMCSA guidance, all roadside inspections must begin in English, and if a driver appears unable to understand or respond appropriately, the officer proceeds with a formal two-step English Proficiency Assessment — a conversational interview in English (no interpreters, translation apps, or other language facilitation tools are permitted), followed by a test on reading and interpreting standard U.S. traffic signs. Drivers who fail either step face citation and immediate out-of-service status under CVSA North American Standard Out-of-Service Criteria.