Free Illinois CDL Double/Triple Trailers Practice Test 2022

Do you know how to pair double or triple trailers? If you are planning to take the CDL double/triple trailer endorsement test, make sure to know it! Our Illinois CDL Practice Test has the same questions as the real exam which is based on the Illinois CDL manual. It covers most of the subject areas on the Double/Triple Trailers Test such as pulling double and triple trailers, the risk of rollover, managing space, and special considerations when hauling multiple trailers. In addition, each question has a detailed explanation that will help you understand the concept and answer future questions about it correctly. If you don't get the pass right away, you can take this CDL practice test an unlimited number of times to make sure you learn all the questions. Let’s try our Free Illinois CDL Double/Triple Trailers Practice Test today and pass your CDL endorsement exam! Good luck and keep driving safely!

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 Double/Triple Trailers Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
1.
What is the "cut-in" pressure for most air compressor governors?
2.
Which is true when checking air flow to all trailers?
3.
When checking the low pressure warning signal, it should turn on before the pressure drops below what psi?
4.
If air supply drops when driving, the tractor protection valve ________.
5.
A low pressure warning signal could be __________.
6.
With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. When you do this, you should hear:
7.
When uncoupling twin trailers you should park:
8.
Automatic air tanks _______.
9.
If you want to couple a second trailer to your combination vehicle, secure it by using:
10.
A danger of a malfunctioning tractor protection valve is:
11.
Letting up on the brake pedal _______.
12.
The tractor protection valve should pop out when air pressure falls to:
13.
Why should you check the brake adjustment often?
14.
Where is compressed air stored?
15.
Vehicles without automatic air tank drains need to be checked manually to remove ________?
16.
What is a front brake limiting valve?
17.
When stab braking if you re-apply the brakes before the wheels start rolling, __________.
18.
In dual-air systems the pressure should build to _______.
19.
If the malfunction lamp stays on after the bulb check, __________.
20.
A converter dolly is used: