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Free Alabama CDL Air Brakes Test 2024
Part of mandatory Entry-Level Driver Training Course Based on 2024 AL commercial driver's license manualAvailable in EN, ES
30questions
6mistakes allowed
80%passing score
This test will allow you to review your knowledge of air brakes in order to receive a CDL without a certain restriction, which will allow you to drive commercial vehicles with air brakes.
Each of our 30 multiple-choice questions is based on the Alabama Commercial Drivers License Manual and applicable Alabama laws. Each question is carefully written based on those you will find on the real DMV exam, and includes a hint and explanation, which you should review carefully so that you can answer more questions on these topics.
Good luck and drive safely!
Perfect for
- First-time AL CDL and CLP applicants
- CDL holders adding endorsements
- AL CDL renewal applicants
What to expect on the actual exam
| How many questions | 25 |
|---|---|
| How many correct answers to pass | 20 |
| Passing score | 80% |
Unlock all 1,500+ exam-like questions for Alabama. Pass Guarantee
Become a member to unlock our extensive library of 1,500+ exam-like questions and get your Alabama ELDT certification online. Official FMCSA-approved national Entry-Level Driver Training provider.
Pass the first time, guaranteed
List of questions (classic view)
- If the air tanks are not drained,
- The purpose of a supply pressure gauge is
- Which vehicles must have low air pressure warning signals?
- Spring brakes are
- Under which conditions are front wheel brakes good?
- How can you tell if your vehicle is equipped with an antilock braking system (ABS)?
- Which of the following are true about a dual air brake system?
- Slack adjusters are
- How would you check your truck's slack adjusters?
- What is the best way to test your vehicle's low air pressure warning signal?
- What is the best way to test if your vehicle's spring brakes come on automatically?
- After the initial drop, the maximum acceptable leakage rates per minute are
- An antilock braking system (ABS)
- Which of the following can cause brakes to fade or fail?
- How do brakes work on a long, steep downgrade?
- When should you use the parking brake?
- When should you drain your air tanks?
- Which of the following is NOT part of the braking process when you're driving a tractor-trailer combination vehicle with an antilock braking system (ABS)?
- Which of the following will be true about your brake function if your antilock braking system (ABS) fails?
- Which of the following should you do before leaving your vehicle unattended?
- Which of the following is NOT part of the air brake system?
- Which of the following is NOT part of the drum brake?
- At what measurement is the safety valve USUALLY set to open?
- The tractor protection valve
- In Alabama, why must you pass a knowledge test on air brakes?
- The low air pressure warning signal will come on before the pressure in the air tanks falls below
- A low pressure warning signal is required on
- All vehicles equipped with air brakes have
- With air brake-equipped vehicles, the parking brakes should be used
- The use of air brakes on a downgrade is only a supplement to the
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