Free Maryland CDL Combination Vehicles Practice Test 2022

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

Our CDL practice tests:
Based on 2022 MD commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
MD CDL Combination Vehicles Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
1.
The air lines on a combination vehicle are often colored to prevent them from mixing up. The emergency line is _____, the service line is _________.
2.
The iron trailer supports are up and the trailer is resting on the tractor. Make sure:
3.
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:
4.
In order to allow the trailer brakes to be applied more quickly, what is connected to the service air line?
5.
When you notice that your trailer has lost traction and is going into a skid, you should:
6.
Trailers will have an ABS malfunction lamp:
7.
When uncoupling, the tractor should:
8.
The emergency air line is usually what color?
9.
Some of the points for inspecting the coupling include the following except:
10.
If the spring brakes are not released when you pushed the trailer air supply valve you should:
11.
Trailer landing gear:
12.
Why should you be sure that the fifth wheel plate is greased as required?
13.
To test the trailer brakes before driving, use the hand valve or the:
14.
You supply air to the trailer tanks by:
15.
Rocky mountain doubles have a rearward amplification of about:
16.
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:
17.
While driving, you should use the trailer hand valve when?
18.
You are coupling a tractor to the semitrailer; you have connected the airlines. Before backing under the trailer, you should:
19.
The front trailer supports are up and the trailer is resting on the tractor. Make sure:
20.
Why should you lock the tractor glad hands to each other (or dummy couplers) when you are not towing a trailer?