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
1.
To prevent moisture from entering the electrical cable when disconnected:
2.
You should not back a tractor under a trailer until the air system is:
3.
After supplying air to the trailer, how should you check for crossed air lines?
4.
The tractor protection valve will close, and the trailer emergency brakes will come on when there is a major leak in the _____ brake line.
5.
You have coupled with a semitrailer, where should you put the iron trailer supports before driving away?
6.
There are two things that a driver can do to prevent a rollover. They are: (1) keep the cargo as close to the ground as possible and (2):
7.
When backing under the trailer, air lines:
8.
Before coupling or uncoupling, the trailer wheels should always be:
9.
What is the term for a commercial vehicle habit of swinging wide on turns?
10.
Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:
11.
When should you use the hand valve to park a combination vehicle?
12.
If the wheels of the trailer lock up and the trailer swings around, it could cause a:
13.
When you notice that your trailer has lost traction and is going into a skid, you should:
14.
Some of the points for inspecting the coupling include the following except:
15.
You are about to back your tractor under a semitrailer. The trailer is at the right height when the:
16.
Driving with an empty trailer:
17.
When backing under the trailer, do all of the following except:
18.
Before getting out to inspect the coupling, secure the vehicle by putting transmission in neutral, shutting off engine and taking the key with you, and:
19.
You are coupling a tractor to the semitrailer; you have connected the airlines. Before backing under the trailer, you should:
20.
A specific item to check on a sliding fifth wheel is: