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View All PlansFree Colorado CDL Air Brakes Test 2025
- Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
- Based on 2025 CO commercial driver's license manual
- Triple-checked for accuracy
- Updated for October 2025
Planning to drive commercial motor vehicles (CMVs) equipped with air brakes? Our practice materials are just what you need for the written knowledge test. Without passing, your CDL will include the restriction “L,” indicating that you’re not allowed to drive CMVs with air brakes. That’s quite a limitation on your job prospects. (Virtually all semi-trucks and tractor-trailers are equipped with air brakes.) Therefore, preparing for this test is a very wise career choice. In fact, in Colorado, the air brakes qualification is a requirement of most companies due to the commonality of this braking system.
Organizations in Colorado that typically require drivers to have this qualification include J.B. Hunt Transport Services, Schneider National, Inc., Swift Transportation, Werner Enterprises, FedEx and UPS Freight, Old Dominion Freight Line, XPO Logistics, YRC Freight, and Estes Express Lines. Air brakes are more powerful than hydraulic brakes, so they can stop a CMV weighing up to 80,000 pounds. They also provide protective redundancy and safety. Simply put, the “L” restriction makes operating CMVs equipped with air brakes illegal, thus limiting your job prospects. So, let’s take a look at the requirements to remove the “L” and become a winner in the industry.
The official DMV test covers the parts of an air brake system, how to use them effectively, and air-brake inspection procedures. There are two parts to the test: the skills test and the knowledge test. The skills test will require you to physically inspect an air brake system, identify its components, and operate a vehicle equipped with air brakes. This test includes checking air pressure, testing the brakes for leaks, and more. The written test is in a multiple-choice format with questions on the concepts you’ve studied in the state’s CDL manual. You’ll need a score of 80% or higher to pass.
We have taken into careful consideration all that is required for the knowledge test and created Colorado DMV CDL Air Brakes Practice Tests, which mimic the content and format you will face on the official DMV test. With our practice test questions and answers provided in real time, you can learn the material quickly and feel confident as you near the day of your official exam. Once you feel prepared, simply schedule the knowledge test at the DMV, pay any fees, and take the test.
- Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
- Triple-checked for accuracy
What you need to know
What to expect on the actual CO DMV exam
questions
correct answers to pass
passing score
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