The School Bus endorsement (S) is only available for Class A or B CDL, and the Doubles/Triples endorsement (T) is only available for Class A driver's licenses. The DMV offers a practice CDL interactive written exam for the general knowledge test as a study guide to prepare you for. The following endorsements may be used with a Class A, B or C CDL: HazMat (H), Tank Vehicles (N), Tank Vehicles Transporting Hazardous Materials (X) and Passenger Transport (P). A special endorsement is also required to drive certain types of vehicles. Depending on what class of license (A, B or C) and endorsements you need, you must take one or more knowledge tests.

CDL knowledge tests include: General Knowledge, Passenger Transport, Air Brakes, Combination Vehicles, Hazardous Materials, Tanker Vehicles, Doubles/Triples, School Bus, Firefighter. Click the 'Start Test' button below to begin. You may not go back once you answer a question. You will be presented with 40 questions and you must answer 34 questions correctly to pass. To get your CDL, you must pass both the knowledge and skills tests. This is the Commercial Vehicle Drivers License Test covering General Knowledge. Take this CDL practice test now to prepare for the actual CO general knowledge test! In addition, the Class A CDL test will include questions based on the Combination Vehicles section.

The general knowledge test covers the contents of the Colorado CDL Manual.Īll CDL applicants (Class A, B and C) must study the following sections: Driving Safely, Transporting Cargo Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Vehicle Inspection Test, Basic Control Skills Test, Road Test. To pass, you must correctly answer at least 40 questions (80%). The Colorado CDL test consists of 50 questions. The CDL general knowledge test is required to be taken by all CDL applicants.

Cdl general knowledge test 3