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 purpose of a modulating control valve?
2.
What is the function of an "application pressure gauge"?
3.
How can you be sure you supplied air to a second trailer?
4.
Air brakes take longer to stop than hydraulic brakes because _______.
5.
When you turn with the tractor/triple trailer combination, the wheels that off-track (cheat) the most are:
6.
When coupling or uncoupling, trailer or dolly wheel should always be:
7.
Brake drums should not have cracks longer than what length?
8.
The trailer air supply control should pop out when the air pressure falls into the pressure range of:
9.
On newer vehicles, the parking brake control knob is typically yellow, but on older vehicles, the parking brake might be what color?
10.
How do you check the low pressure warning signal?
11.
The most common type of foundation brake is?
12.
When the safety valve releases air this indicates ___________.
13.
When testing the trailer emergency brakes, charge the system, pull out the trailer air supply control, and:
14.
Why should you never leave your vehicle unattended without applying the parking brakes?
15.
Which of the following is the most common reason brakes fade?
16.
Wedge brakes and disc brakes are ______ than s-cam brakes.
17.
When you need to apply more pressure to help your brakes work normally effectively, this means that your brakes are fading. Which of the following can cause fading brakes?
18.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
19.
What affects the stopping distance for air brakes?
20.
To position the converter dolly over short distances you can: