Free Colorado CDL Combination Vehicles Practice Test 2022

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 2022 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.
Before you back under a trailer, make sure that:
2.
The air lines on a combination vehicle are often colored to prevent them from mixing up. The emergency line is _____, the service line is _________.
3.
Hose couplers are also referred to as:
4.
To unlock the fifth wheel, the locking lever should be placed in the ______ position.
5.
The iron trailer supports are up and the trailer is resting on the tractor. Make sure:
6.
If your trailer goes into a skid, you should do all of the following except:
7.
After you supply air to the trailer, make sure the air lines are not crossed and the trailer brakes are working. This is done by:
8.
Compared to a straight truck or bus, there are ______ things to inspect in combination vehicles.
9.
To help prevent rollover, keep the center of gravity of the load as low as possible, and:
10.
To help release the fifth wheel locking lever:
11.
When unlocking the fifth wheel in Step 6, all of the following apply except:
12.
When checking the trailer emergency brakes, the tractor protection control valve should be placed in what position?
13.
Trailers will have an ABS malfunction lamp:
14.
Crack-the-whip effect occurs when:
15.
All of these are part of the final 3 steps of uncoupling the trailer except:
16.
Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:
17.
Air and electrical lines from the tractor to the trailer should be:
18.
To test the tractor protection valve, pump the brakes with the engine off until the trailer air supply knob pops out, usually at:
19.
At the back of trailer used to tow other trailers are shut-off valves, also called:
20.
The fifth wheel locking lever is not locked after the jaws close around the kingpin. This means that: