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  • Updated for October 2024
  • Based on 2024 AL commercial driver's license manual

Free Alabama CDL Combination Practice Test 2024 | AL

This CDL practice test is a great place to start if you’re after the AL Combination Vehicles endorsement. Each of the 25 questions is based on the official 2024 CDL manual. The test is designed to prepare you for the Combination Vehicles portion of your 2024 Commercial Driver’s License exam. There are several answer options, but only one of them is correct. Every time you answer a question, you’ll get immediate feedback with a detailed explanation, so you won’t need to wait until the end of the test to know the correct answers.

Commercial Driver's License
  • Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
  • Triple-checked for accuracy

What you need to know

9 min to complete
Available in EN and ES
Verified by Steven Litvintchouk, M.S., Chief Educational Researcher, Member of ACES. See our detailed commitment to accuracy and quality in our practice tests.
Ensuring the accuracy and quality of our program is paramount. Learn more about our rigorous standards in our Commitment to Accuracy article.

What to expect on the actual AL DMV exam

20

questions

16

correct answers to pass

80%

passing score

List of questions (classic view)

  1. After you lock the kingpin into the fifth wheel, how should you check the connection?
  2. After you connect the air lines but before you back under the trailer, you should
  3. Which statement best illustrates the "crack-the-whip" effect?
  4. When you inspect the landing gear after uncoupling the trailer, where should the tractor be?
  5. What is the safest way to turn right from a two-way road?
  6. To drive a triple combination vehicle, you must have
  7. To prevent rollover, cargo should be
  8. Combination vehicles take longer to stop when they are empty than when they are fully loaded, because
  9. If your vehicle gets stuck on a railroad track, you should
  10. Low-slung vehicles can be risky at railroad crossings because
  11. On a double or triple vehicle, which wheels offtrack the most?
  12. When you're pulling doubles or triples, the shut-off valves should always be
  13. On a trailer, where is the yellow antilock brake (ABS) malfunction lamp located?
  14. Even before antilock braking systems (ABS) were required, some vehicles already had them. How can you check if your vehicle has ABS?
  15. An antilock braking system (ABS) is useful
  16. After coupling, make sure that the air lines are not crossed. How should you do this?
  17. During uncoupling, you should disconnect the electrical cable and
  18. Before you start to uncouple, you must
  19. You can confirm that air is going to all brakes in your trailers by
  20. To uncouple a loaded trailer, after the landing gear has made firm contact with the ground, you should
  21. If the trailer has antilock brakes (ABS) but the tractor doesn't,
  22. To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and
  23. If your test of the tractor protection valve is successful,
  24. The tractor protection valve is designed to close automatically when the air pressure falls into the pressure range specified by the manufacturer, typically
  25. As part of your vehicle inspection test, if your vehicle is equipped with air brakes and has a trailer, you will inspect the air connections between the truck or tractor and the trailer. Make sure that the ________ are locked in place and free of damage or air leaks.
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