Free Louisiana CDL Double/Triple Trailers Practice Test 2023

Do you know how to pair double or triple trailers? If you are planning to take the Louisiana CDL double/triple trailer endorsement test, make sure to know it! Our Louisiana CDL Practice Test has the same questions as the real exam which is based on the Louisiana CDL Book. 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 Louisiana 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 LA commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
LA CDL Double/Triple Trailers Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
What is the function of an "application pressure gauge"?
To test the tractor protection valve, the engine needs to be:
If air supply drops when driving, the tractor protection valve ________.
Automatic slack adjusters ________.
You are driving a 100-foot truck with double trailers at 30 mph. The road is dry, and visibility is good. You should keep at least ______ seconds of space ahead of you.
When coupling, correct trailer height should:
Automatic adjusters should ________.
After coupling, the air shut-off valves at the back of the first trailer should be:
An air brake is made up of which of the following braking systems?
Which of these statements about the handling of doubles and triples is true?
The service brake system ________.
During normal operation, the brakes of the double/triple trailer are controlled by:
On newer vehicles, the parking brake control knob is typically yellow, but on older vehicles, the parking brake might be what color?
Letting up on the brake pedal _______.
What does the air compressor governor control?
Why do some air brake systems have an alcohol evaporator?
Why should you never push the brake pedal down when the spring brakes are on?
When the mechanical arm of a wig wag drops into your view that means the pressure in your system has dropped below what psi?
When inspecting doubles and triples shut-off valves, which of the following is true?
When uncoupling the rear trailer, which of these should be done first?