Free District of Columbia 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 DC CDL practice test source for your coming CDL test? You are in the right place. Our practice test is a great resource for beginners. The CDL practice 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. They cover topics ranging from combination vehicle maintenance to safely driving a complex rig. Each question is based on the official DC 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 District of Columbia CDL Combination Vehicles Practice Test today and walk out with your endorsement!

Our CDL practice tests:
Based on 2022 DC commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
DC 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.
After supplying air to the trailer, how should you check for crossed air lines?
3.
Over 50% of truck driver accident deaths are caused by:
4.
When you get ready to back under a semitrailer you should line up:
5.
Tractor with a ______ trailer requires the shortest amount of stopping distance.
6.
Off-tracking or cheating causes which of these to follow the wider path while making a turn?
7.
You have pushed the trailer air supply valve. You should not back a tractor under a trailer until the whole air system is:
8.
When coupling, trailer height should:
9.
Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:
10.
To help release the fifth wheel locking lever:
11.
A driver crosses the air lines when hooking up to an old trailer. What will happen?
12.
The tractor should be positioned to back under the trailer:
13.
Some of the points for inspecting the coupling include the following except:
14.
The best and earliest way to recognize that your trailer has started to skid is:
15.
Driving with an empty trailer:
16.
Rocky mountain doubles have a rearward amplification of about:
17.
All of these are part of the final 3 steps of uncoupling the trailer except:
18.
When backing under the trailer, do all of the following except:
19.
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:
20.
Glad hands are usually connecting which of these?