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 "cut-in" pressure for most air compressor governors?
2.
What is a modulating control valve?
3.
What is the purpose of an antilock braking system (ABS)?
4.
You will test that the trailer service brakes are working by:
5.
How often should alcohol containers be checked during cold weather?
6.
The braking power of the spring brakes ______.
7.
Which of these statements about the handling of doubles and triples is true?
8.
You are driving a set of doubles and a set of trailer wheels goes into a skid. Which of these is most likely to occur?
9.
On newer vehicles, the parking brake control knob is typically yellow, but on older vehicles, the parking brake might be what color?
10.
When driving doubles or triples in adverse or slippery weather conditions, all of the following are true except:
11.
During a normal drive, the spring brakes are held back by _____.
12.
An air compressor can be cooled by _______.
13.
Why does a heavily-loaded vehicle take longer to stop than a lightly-loaded vehicle?
14.
Why should you never leave your vehicle unattended without applying the parking brakes?
15.
In tractors and straight trucks spring brakes will come on fully when the air pressure drops to what range?
16.
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?
17.
Why should air tanks be drained completely?
18.
Water and oil _______.
19.
You are doing a walk around inspection of a double or triple trailer rig. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _________.
20.
The last step to uncouple a converter dolly is: