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.
Automatic slack adjusters ________.
2.
The air compressor governor stops air from pumping when it reaches the "cut-out" level or around generally _________.
3.
An application pressure gauge shows how much air you are applying to the brakes. Increased application pressure to maintain the same speed indicates that __________.
4.
How do air-operated disc brakes work?
5.
The braking power of the spring brakes ______.
6.
You are driving a set of doubles and a set of trailer wheels goes into a skid. Which of these is most likely to occur?
7.
Which of these statements about the handling of doubles and triples is true?
8.
If the dolly has spring brakes, release them with:
9.
During normal operation, the brakes of the double/triple trailer are controlled by:
10.
A safety valve that releases air _______.
11.
What is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer?
12.
If you have manual transmission _________.
13.
To apply the parking brakes, you should _______.
14.
Which of the following factors explains why the total stopping distance for air brakes is longer than that for hydraulic brakes?
15.
Water and oil _______.
16.
Why should you drain water from compressed air tanks?
17.
You can test whether the trailer air system is charged by:
18.
Why is it so crucial to drain your vehicle's air tanks at the end of each day of driving?
19.
The last step to uncouple a converter dolly is:
20.
Drivers of doubles and triples must take into greater account: