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.
What is the function of an "application pressure gauge"?
2.
What is a modulating control valve?
3.
What is the purpose of a front-brake limiting valve?
4.
When coupling, correct trailer height should:
5.
If air supply drops when driving, the tractor protection valve ________.
6.
How do air-operated disc brakes work?
7.
After coupling, the air shut-off valves at the back of the first trailer should be:
8.
The increased likelihood of doubles and triples turning over is called:
9.
Brake drums should not have cracks longer than what length?
10.
An air compressor can be cooled by _______.
11.
Pushing the brake pedal down when the spring brakes are on could _________.
12.
Why should you check the brake adjustment often?
13.
Why does a heavily-loaded vehicle take longer to stop than a lightly-loaded vehicle?
14.
If your vehicle is not equipped with ABS, when you brake hard on a slippery surface what may occur?
15.
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?
16.
If you have manual transmission _________.
17.
Vehicles with air brakes have pressure gauges connected to the _______.
18.
When the mechanical arm of a wig wag drops into your view that means the pressure in your system has dropped below what psi?
19.
You can test whether the trailer air system is charged by:
20.
A visual inspection after coupling should show that: