Colorado CDL Practice Test 2026
The Colorado CDL knowledge test covers 50 questions on commercial vehicle operation, safety regulations, and pre-trip inspections. A 80% score is required to pass. Start with a free CDL practice test to gauge your readiness.
Explore all CDL practice tests across 50 states and 7 endorsements.
Updated April 2026
How we help you prepare
260 practice questions to help you master the Colorado CDL Test,, 4 practice tests, 1 exam simulation
Colorado requirement to pass
50 questions on the real test, 80% passing score (40 of 50), no time limit
Study by Category is a Pro Feature
Master each topic before your Colorado written test. 4 categories are free to start.
Practice Runs
Complete practice runs to test your knowledge. Runs 1-2 are free.
Test 1: Rules of the Road
Right-of-way, turns, intersections, passing, lane changes
Test 2: Road Signs & Signals
Regulatory signs, warning signs, traffic signals, road markings
Pro Study Tools
Unlock the full learning system to maximize your chances of passing.
The Colorado CDL knowledge test has 50 multiple-choice questions. You need 40 correct answers (80%) to pass. There is no time limit. Tests are administered by the DMV. Questions cover commercial vehicle operation, safety regulations, and road signs, traffic laws, and Colorado-specific rules. Read how DMV IQ prepares you for test day.
About the CDL Knowledge Test
To obtain a Commercial Driver's License in Colorado, you must first pass the CDL general knowledge written test administered by the DMV. The general knowledge exam consists of 50 multiple-choice questions covering vehicle inspection, basic control, safe driving, transporting cargo, and federal regulations. A score of 80% or higher (40 correct) is required to pass.
CDL Classes and Endorsements
Colorado issues three CDL classes. Class A covers combination vehicles over 26,001 lbs GVWR when the towed unit exceeds 10,000 lbs — this is what you need for tractor-trailers and most heavy hauling. Class B covers single vehicles over 26,001 lbs such as straight trucks, large buses, and dump trucks. Class C covers vehicles designed for 16+ passengers or those carrying hazardous materials that don't meet Class A or B criteria.
Beyond the general knowledge test, you may need additional written tests for endorsements: Hazardous Materials (H), Tanker (N), Passenger (P), School Bus (S), Doubles/Triples (T), or the combined HazMat-Tanker (X). Each endorsement requires its own written exam, and HazMat also requires a TSA background check.
Entry-Level Driver Training (ELDT)
Since February 2022, federal law requires Entry-Level Driver Training (ELDT) through an FMCSA-registered training provider before you can take the CDL skills test for a Class A or B CDL. ELDT is also required before adding Hazardous Materials, Passenger, or School Bus endorsements. This applies in Colorado and every other state.
Where to Take the Test
The CDL knowledge test is taken at any Colorado DMV office or authorized driver license office. Walk-ins are typically accepted, though scheduling ahead is recommended. The test is available in English, Spanish. Results are delivered immediately — results shown on screen.
Preparing for Your CDL Test
The CDL test draws from the Colorado CDL Manual and the federal Motor Carrier Safety Regulations. Key topics include pre-trip vehicle inspection procedures, air brake systems, coupling and uncoupling, cargo securement, hours-of-service rules, hazard perception, and accident procedures. Colorado-specific regulations on weight limits, required permits, and designated truck routes may also appear.
Taking practice tests before your appointment is one of the most effective ways to prepare. Focus on understanding road signs and the concepts behind each question rather than memorizing answers — the real test may phrase questions differently than what you studied.
Retake Policy
Can retake the next business day. No limit on attempts.
Try It Yourself
Get a taste of the study experience. Answer a real question or preview the timed exam simulator.
Sample Flash Card
At what psi should the air compressor governor cut-out (stop pumping air)?
Try all 4 free practice runs
Start PracticingWhen approaching a school zone during school hours, the maximum speed limit in Colorado is:
Exam Simulator
Timed, 50-question test that mirrors the real Colorado DMV exam. 80% to pass.
Unlock with ProKnow exactly when you're ready
The IQ Readiness Score™ measures six dimensions of CDL test readiness: memory stability, test performance, content coverage, recent accuracy, difficulty mastery, and reaction speed.