Free Alabama 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 Alabama CDL practice test has the same questions as the real exam which is based on the Alabama 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 Alabama CDL Double/Triple Trailers Practice Test today and pass your CDL exam! Good luck and keep driving safely!

Our CDL practice tests:
Based on 2022 AL commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
AL CDL Double/Triple Trailers Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
1.
The part of the combination vehicle most likely to turn over is the:
2.
What is the purpose of a modulating control valve?
3.
The air compressor governor stops air from pumping when it reaches the "cut-out" level or around generally _________.
4.
Automatic slack adjusters ________.
5.
To test the tractor protection valve, the engine needs to be:
6.
In terms of stability, doubles and triples are:
7.
An air brake is made up of which of the following braking systems?
8.
The air compressor should pump air starting at what psi?
9.
When uncoupling twin trailers you should park:
10.
The tractor protection valve should pop out when air pressure falls to:
11.
What is a front brake limiting valve?
12.
Typically, air storage tanks hold enough air to allow the brakes to be used _______ even if the compressor stops working.
13.
When stab braking if you re-apply the brakes before the wheels start rolling, __________.
14.
When you make an emergency stop, you should _________.
15.
Why should the air hoses connected to the brake chambers be checked?
16.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
17.
Why do some air brake systems have an alcohol evaporator?
18.
In dual-air systems the pressure should build to _______.
19.
To position the converter dolly over short distances you can:
20.
If the malfunction lamp stays on after the bulb check, __________.