Free Colorado CDL Combination Vehicles Practice Test 2023

You have to pass the Colorado CDL combination vehicles endorsement to get ready for propelling your career with your license. You are looking for a good Colorado CDL practice test source for your coming CDL test? You are in the right place. Our CDL practice test is a great resource for beginners. The test is designed for you to have exactly the experience of the exam as you will be more familiar with both the test format and the subject. Our Practice Test covers topics ranging from combination vehicle maintenance to safely driving a complex rig. Each question is based on the official Colorado CDL manual so you can be sure that the information in our test is accurate and relevant to your examination. In addition, each question has a detailed explanation so that it is very useful for you to learn from your mistakes. Preparing well before test day with questions and content that we cover. Start with our Free Colorado CDL Combination Vehicles Practice Test today and walk out with your endorsement!

Our CDL practice tests:
Based on 2021 CO commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
CO CDL Combination Vehicles Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
Semi-trailers made before 1975 that are equipped with air brakes:
How much space should be allowed between the upper and lower fifth wheel after coupling?
A function of the tractor protection valve is:
The trailer service brakes should be tested with the hand control, and controlled during normal operation by:
When uncoupling, make sure that the parking area:
When you are uncoupling a loaded trailer, you should lower the landing gear until it:
After you lock the kingpin into the fifth wheel, you should check the connection by:
When you get ready to back under a semitrailer you should line up:
Tractor with a ______ trailer requires the shortest amount of stopping distance.
The tractor should be positioned to back under the trailer:
The best and earliest way to recognize that your trailer has started to skid is ____.
If the spring brakes are not released when you pushed the trailer air supply valve you should:
You are coupling a tractor to a semitrailer and have backed up, but are not under it. What should you hook up before backing under?
In normal driving, some drivers use the hand valve before the brake pedal to prevent a jack-knife. Which of the statements is true?
Like tractor air tanks, trailer air tanks should be kept free of dirt and oil by:
The "rearward amplification" value means _______.
While driving, you should use the trailer hand valve when?
When driving a set of doubles, it is necessary to close which shut-off valve in the last trailer:
If you cannot complete your turn without entering another traffic lane you should:
The front trailer supports are up and the trailer is resting on the tractor. Make sure: