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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
Study now
List of questions
1.
Air brake equipped trailers made before 1975:
2.
The likelihood of a fully loaded rig turning over compared to an empty trailer is:
3.
One good way to prevent rollover is:
4.
When inspecting the coupling area, all of the following are required, EXCEPT:
5.
The air leakage rate for a combination vehicle (engine off, brakes on) should not be more than _____ psi per minute.
6.
The higher the center of gravity of your truck, the:
7.
When traveling under 40 mph, how much distance should you leave, at minimum, from the car in front of you?
8.
Supplied by the service line from the tractor, each trailer or dolly has its own:
9.
When connecting the glad hands, press the two seals with the couplers together at what degree to each other?
10.
Rearward amplification is a major cause of:
11.
When pulling trailers:
12.
The emergency air line controls the emergency brakes on combination vehicles, and:
13.
Improperly greased or lubricated fifth wheels will cause:
14.
A driver crosses the air lines when hooking up to an old trailer. What will happen?
15.
How much space should there be between the upper and lower fifth wheel?
16.
A fifth wheel in proper position for coupling will have:
17.
You have a major leak in the service line, and you put on the brakes. Service air will escape and cause the:
18.
What gear should the tractor engine be in after you uncouple the trailer and are inspecting the trailer supports?
19.
The hand valve should be used:
20.
When coupling, the proper position of the fifth wheel is:
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