Free Illinois CDL Combination Vehicles Practice Test 2022

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

Our CDL practice tests:
Based on 2022 IL commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
IL CDL Combination Vehicles Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
1.
The trailer air supply control knob is:
2.
While driving behind another vehicle, under good conditions, you should allow at least one second between your vehicle and the vehicle ahead for each ____ feet of your vehicle length.
3.
When you open the emergency shut-off valve at the back of the last trailer after supplying air to trailer(s):
4.
The air leakage rate for a combination vehicle (engine off, brakes on) should not be more than _____ psi per minute.
5.
A function of the tractor protection valve is:
6.
Over 50% of truck driver accident deaths are caused by:
7.
To prevent water and dirt from entering the air system, hose couplers can be attached to dummy couplers or:
8.
When you get ready to back under a semitrailer you should line up:
9.
After you lock the kingpin into the fifth wheel, you should check the connection by:
10.
In order to allow the trailer brakes to be applied more quickly, what is connected to the service air line?
11.
What is the term for a commercial vehicle habit of swinging wide on turns?
12.
To help release the fifth wheel locking lever:
13.
Improperly greased or lubricated fifth wheels will cause:
14.
Some of the points for inspecting the coupling include the following except:
15.
How should you test the tractor-semitrailer connection for security?
16.
The best and earliest way to recognize that your trailer has started to skid is:
17.
You have a major leak in the service line, and you put on the brakes. Service air will escape and cause the:
18.
When backing a tractor under a trailer you should:
19.
The safety latch for the fifth wheel locking lever must be _____ for a coupling to be complete.
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: