Free Delaware CDL Combination Vehicles Practice Test 2022

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 2022 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
List of questions
1.
To prevent moisture from entering the electrical cable when disconnected:
2.
When you open the emergency shut-off valve at the back of the last trailer after supplying air to trailer(s):
3.
The trailer service brakes should be tested with the hand control, and controlled during normal operation by:
4.
To help prevent rollover, keep the center of gravity of the load as low as possible, and:
5.
Rearward amplification is a major cause of:
6.
To make coupling and uncoupling a loaded trailer easier:
7.
Before coupling or uncoupling, the trailer wheels should always be:
8.
When backing under the trailer, air lines:
9.
When coupling, trailer height should:
10.
When unlocking the fifth wheel in Step 6, all of the following apply except:
11.
Improperly greased or lubricated fifth wheels will cause:
12.
The tractor should be positioned to back under the trailer:
13.
If the wheels of the trailer lock up and the trailer swings around, it could cause a:
14.
Some of the points for inspecting the coupling include the following except:
15.
How much space should there be between the upper and lower fifth wheel?
16.
To test the trailer brakes before driving, use the hand valve or the:
17.
Like tractor air tanks, trailer air tanks should be kept free of dirt and oil by:
18.
Driving with an empty trailer:
19.
When backing under the trailer, do all of the following except:
20.
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: