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Free Delaware CDL Combination Vehicles Practice Test 2023

You have to pass the CDL combination vehicles endorsement to get ready for propelling your career with your license. You are looking for a good Delaware 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. The Practice Test covers topics ranging from combination vehicle maintenance to safely driving a complex rig. Each question is based on the official Delaware 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 Delaware CDL Combination Vehicles Practice Test today and walk out with your endorsement!

Our CDL practice tests:
Based on 2021 DE commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
DE CDL Combination Vehicles Test format:
20 questions
16 correct answers to pass
80% passing score
Study now
List of questions
1.
When a vehicle goes around a corner, the rear wheels follow a different path than the front. This is called:
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.
The trailer air supply control knob is _____.
4.
Spring brakes are not required on trailers and dollies built before:
5.
To prevent water and dirt from entering the air system, hose couplers can be attached to dummy couplers or:
6.
When connecting the glad hands, press the two seals with the couplers together at what degree to each other?
7.
Tractor with a ______ trailer requires the shortest amount of stopping distance.
8.
When driving a combination vehicle with multiple trailers or dollies, all air shut-off valves except the last one at the back must be:
9.
A major leak in the trailer emergency line will cause:
10.
When parking trailers without spring brakes, it is very important to:
11.
The emergency air line is usually what color?
12.
Trailer landing gear ________.
13.
Why should you be sure that the fifth wheel plate is greased as required?
14.
In normal driving, some drivers use the hand valve before the brake pedal to prevent a jack-knife. Which of the statements is true?
15.
The "rearward amplification" value means _______.
16.
Rocky mountain doubles have a rearward amplification of about:
17.
After connecting the air lines but before backing under the trailer you should:
18.
If you cannot complete your turn without entering another traffic lane you should:
19.
In case of landing gear failure while pulling out from under it, you should:
20.
Why should you lock the tractor glad hands to each other (or dummy couplers) when you are not towing a trailer?
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