# Free Arizona CDL Double/Triple Trailers Practice Test 2023

Do you know how to pair double or triple trailers? If you are planning to take the Arizona CDL double/triple trailer endorsement test, make sure to know it! Our Arizona CDL practice test pack has the same questions as the real exam which is based on the Arizona 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 Arizona 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 2021 AZ commercial driver's license manual
Perfect for first-time, renewal applicants
AZ CDL Double/Triple Trailers Test format:
20 questions
80% passing score
List of questions
1.
What is the "cut-in" pressure for most air compressor governors?
2.
What is the purpose of a front-brake limiting valve?
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.
When coupling, correct trailer height should:
5.
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:
6.
If the rear trailer does not have spring brakes, disconnecting the emergency line after charging will:
7.
The air compressor should pump air starting at what psi?
8.
At 55 mph on dry pavement, the air brake lag distance is how many feet?
9.
A safety valve that releases air _______.
10.
If you want to couple a second trailer to your combination vehicle, secure it by using:
11.
When the safety valve releases air this indicates ___________.
12.
Wedge brakes and disc brakes are ______ than s-cam brakes.
13.
If you have manual transmission _________.
14.
To apply the parking brakes, you should _______.
15.
When performing the controlled braking method for an emergency stop, you are _________.
16.
Why do some air brake systems have an alcohol evaporator?
17.
Why should you not drive your vehicle if the air pressure does not build up quickly enough?
18.
You can test whether the trailer air system is charged by:
19.
The last step to uncouple a converter dolly is _______.
20.
A converter dolly is used: