Free Louisiana CDL Combination Vehicles Practice Test 2022

You have to pass the Louisiana CDL combination vehicles endorsement to get ready for propelling your career with your license. You are looking for a good Louisiana 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 Louisiana CDL Book 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 Louisiana CDL Combination Vehicles Practice Test today and walk out with your endorsement!

Our CDL practice tests:
Based on 2022 LA commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
LA CDL Combination Vehicles Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
1.
The likelihood of a fully loaded rig turning over compared to an empty trailer is:
2.
One good way to prevent rollover is:
3.
The air leakage rate for a combination vehicle (engine off, brakes on) should not be more than _____ psi per minute.
4.
The tractor protection valve will close, and the trailer emergency brakes will come on when there is a major leak in the _____ brake line.
5.
Supplied by the service line from the tractor, each trailer or dolly has its own:
6.
To prevent water and dirt from entering the air system, hose couplers can be attached to dummy couplers or:
7.
After you lock the kingpin into the fifth wheel, you should check the connection by:
8.
You have pushed the trailer air supply valve. You should not back a tractor under a trailer until the whole air system is:
9.
Rearward amplification is a major cause of:
10.
A major leak in the trailer emergency line will cause:
11.
The locking jaws should be around:
12.
A driver crosses the air lines when hooking up to an old trailer. What will happen?
13.
When unlocking the fifth wheel in Step 6, all of the following apply except:
14.
Improperly greased or lubricated fifth wheels will cause:
15.
When parking trailers without spring brakes, it is very important to:
16.
When backing a tractor under a trailer you should:
17.
You have a major leak in the service line, and you put on the brakes. Service air will escape and cause the:
18.
Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:
19.
To test the tractor protection valve, pump the brakes with the engine off until the trailer air supply knob pops out, usually at:
20.
At the back of trailer used to tow other trailers are shut-off valves, also called: