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Free Louisiana CDL Air Brakes Test 2025
Part of mandatory Entry-Level Driver Training Course Based on 2025 LA commercial driver's license manualAvailable in EN, ES
30questions
6mistakes allowed
80%passing score
Louisiana is one of the best states in the nation for truck driving, with a robust amount of exports needed all over the country and internationally. As a Louisiana truck driver, the best way to support oneself is to have a license with the fewest amounts of restrictions and that means learning how to drive with air brakes. To get a CDL with an air brakes qualification, you should take practice exams early and often. Then on the day of the real exam, you will find that you’re incredibly comfortable with the questions already. This 30 multiple-choice question quiz, complete with hints and explanations, is closely based on the Louisiana Commercial Driver’s License Manual’s series of questions about air brakes, so take it as many times as you need to get a perfect score, and you’ll be on your way to driving with air brakes starting today!
Perfect for
- First-time LA CDL and CLP applicants
- CDL holders adding endorsements
- LA 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 Louisiana. Pass Guarantee
Become a member to unlock our extensive library of 1,500+ exam-like questions and get your Louisiana ELDT certification online. Official FMCSA-approved national Entry-Level Driver Training provider.
Pass the first time, guaranteed
List of questions (classic view)
- Which of the following should you do before leaving your vehicle unattended?
- When should you use the parking brakes?
- How do brakes work on a long, steep downgrade?
- Under which conditions are front-wheel brakes good?
- The purpose of a supply pressure gauge is
- Which of the following are true about a dual air brake system?
- Which of the following can cause brakes to fade or fail?
- When should you drain your air tanks?
- Spring brakes are
- Slack adjusters are
- At what measurement is the safety valve USUALLY set to open?
- How do you check your truck's slack adjusters?
- Which of the following is NOT part of the braking process when driving a tractor-trailer combination vehicle with an anti-lock braking system (ABS)?
- Which of the following is NOT part of the drum brake?
- An anti-lock braking system (ABS)
- Which vehicles must have low air pressure warning signals?
- Which of the following will be true about your brake function if your anti-lock braking system (ABS) fails?
- What is the best way to test if your vehicle's spring brakes come on automatically?
- If the air tanks are not drained,
- How can you tell if your vehicle is equipped with an anti-lock braking system (ABS)?
- After the initial drop, the maximum acceptable leakage rates per minute are
- Which of the following is NOT part of the air brake system?
- What is the best way to test your vehicle's low air pressure warning signal?
- Why must you pass a knowledge test on air brakes?
- The tractor protection valve
- 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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