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Free Alabama CDL Double/Triple Trailers Practice Test 2023

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 2021 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
Study now
List of questions
1.
What should you do when the low air pressure warning comes on?
2.
What is the function of a stop light switch?
3.
Automatic slack adjusters ________.
4.
To test the tractor protection valve, the engine needs to be:
5.
When driving a truck with more than one trailer, which trailer should be first behind the truck?
6.
In terms of stability, doubles and triples are:
7.
On older vehicles, a low air pressure warning signal comes on at what psi?
8.
When uncoupling twin trailers you should park:
9.
A front brake limiting valve ______.
10.
Air tanks need to be drained ______.
11.
What is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer?
12.
How should the air leakage rate be tested?
13.
After coupling the converter dolly to the first trailer, the pintle hook should be:
14.
When checking that air is flowing to all trailers, what is used to provide air to the supply lines?
15.
When testing the trailer emergency brakes, charge the system, pull out the trailer air supply control, and:
16.
When stab braking if you re-apply the brakes before the wheels start rolling, __________.
17.
Why should the air hoses connected to the brake chambers be checked?
18.
It's important that a warning signal comes on before the air pressure in the tank falls below _______.
19.
Why should you never push the brake pedal down when the spring brakes are on?
20.
If the malfunction lamp stays on after the bulb check, __________.
Alabama Passenger Vehicles TestAlabama Pre-Trip TestAlabama Tanker Vehicles TestAlabama Air Brake TestAlabama Combination Vehicles TestAlabama General Knowledge TestAlabama School Bus TestAlabama Hazmat TestAlabama Doubles/ Triples Trailers Test