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Free California CDL Combination Vehicles Practice Test 2023

You have to pass the California CDL combination vehicles endorsement to get ready for propelling your career with your license. You are looking for good source material for your coming CDL test? You are in the right place. Our CDL practice test website 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. The California CDL Combination Vehicles Practice Test covers topics ranging from combination vehicle maintenance to safely driving a complex rig. Each question is based on the official California CDL Handbook 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 California CDL Practice Test today and walk out with your endorsement!

Our CDL practice tests:
Based on 2021 CA commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
CA CDL Combination Vehicles Test format:
20 questions
16 correct answers to pass
80% passing score
Study now
List of questions
1.
After the trailer has been coupled to the tractor, the tractor protection control valve should be placed in what position?
2.
When traveling under 40 mph, how much distance should you leave, at minimum, from the car in front of you?
3.
When uncoupling, make sure that the parking area:
4.
To prevent water and dirt from entering the air system, hose couplers can be attached to dummy couplers or:
5.
Tractor with a ______ trailer requires the shortest amount of stopping distance.
6.
To make coupling and uncoupling a loaded trailer easier:
7.
In order to allow the trailer brakes to be applied more quickly, what is connected to the service air line?
8.
You are driving a combination vehicle when the trailer breaks away, pulling apart both air lines. You expect the trailer brakes to come on and:
9.
There are two things that a driver can do to prevent a rollover. They are: (1) go slow around turns, and (2):
10.
Trailers will have an ABS malfunction lamp:
11.
Converter dollies:
12.
When uncoupling, the tractor should:
13.
The best and earliest way to recognize that your trailer has started to skid is ____.
14.
To test the trailer brakes before driving, use the hand valve or the ____.
15.
A fifth wheel in proper position for coupling will have:
16.
You supply air to the trailer tanks by:
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 will happen if the air lines are crossed when you hook up to an old trailer?
19.
Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:
20.
In case of landing gear failure while pulling out from under it, you should:
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