CDL Practice Test

Welcome to the Colorado CDL practice test site. Topics covered in these practice tests are designed to prepare you for the Colorado Department of Motor Vehicles CDL test. These tests are free and you are able to take tests as many times as you would like as you prepare to obtain your Colorado CDL. You will be presented with 40 questions and you must answer 34 questions correctly to pass. There is a 50-minute time limit.  You may not go back once you answer a question. Click the “Start Test” button below to begin. 

colorado Drivers Test

colorado Motorcycle Test

colorado CDL Test

CDL Category Practice Tests

CDL General Knowledge Test

Combination Vehicles Test

Passenger Vehicles Test

Pre-Trip Inspections Test

Double/Triple Trailers Test

CDL School Bus Test

CDL Air Brakes Test

Hazardous Materials Test

CDL Tanker Vehicles Test

CDL Practice Test

How To Get A colorado Commercial Drivers License

Colorado residents the age of 18 or older can apply for their commercial driver’s license. Those between the ages of 18 and 21 are restricted to intrastate driving. Individuals must be 21 years or older to receive their Hazmat, School Bus, or Doubles/Triples Endorsements. All applicants must possess a DOT medical card issued by a FMCSA certified medical examiner in order to be eligible for their CDL.

Any applicants that fall under the following conditions are automatically disqualified from receiving a CDL.

  • Having more than one driver’s license.
  • Being disqualified for commercial driving privileges in another state.
  • Being convicted in the past two years of driving a commercial vehicle impaired.
  • Having a suspended, canceled, denied, or revoked driver’s license.

All Colorado residents who are seeking to get their commercial driver’s license must pass both one or more knowledge tests as well as a practical skills test.

T – Double And Triple Trailers
N – Tanker Vehicles
P – Passenger
S – School Bus
H – Hazardous Materials
X – Tanker With Hazmat

Hit the Open Road

colorado CDL License Test Tips

All applicants are required to take one or more knowledge tests to display their comprehension of the commercial driving law. Class A, B, and C applicants must complete a 50 question assessment. Class A applicants are responsible for completing an additional 20 questions all based on the subject of combination driving. Applicants seeking endorsements will be required to complete a knowledge test specific to the endorsement sought. The endorsement tests range between 20 and 30 questions. All applicants must receive a score of 80 percent or higher to pass a knowledge test.
Applicants for a Colorado CDL must complete a skills test is order to receive their CDL. The skills assessment is comprised of an on-road test, vehicle inspection, and basic controls skills test. Applicants who are applying for endorsements are required to complete the skills test with the type of vehicle the endorsement is intended for.

Additional Information

Information on the Colorado Division of Motor Vehicles

The State of Colorado Department of Revenue Division of Motor Vehicles regulates the CDL requirements and testing in Colorado. To get more information contact them via:


Phone:  303.205.5600


Additional Colorado CDL Helpful Links

Please use the links below to access more valuable Colorado CDL testing resources and to learn more about practice driving tests for the state of Colorado.