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Free Alaska CDL Air Brakes Test 2025
Part of mandatory Entry-Level Driver Training Course Based on 2025 AK commercial driver's license manualAvailable in EN, ES
30questions
6mistakes allowed
80%passing score
Your knowledge of air brakes will be tested to allow you to work toward getting a license without the “L” restriction in Alaska and to help you become a safer driver today.
We have included 30 multiple-choice questions carefully written based on the Alaska Commercial Driver License Manual and applicable Alaska laws. Each question includes a hint and an explanation. It is recommended that you carefully read each question’s explanation to gain some further insight into the topic to prepare for different questions on the real CDL air brake exam.
Good luck and drive safe!
Perfect for
- First-time AK CDL and CLP applicants
- CDL holders adding endorsements
- AK 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 Alaska. Pass Guarantee
Become a member to unlock our extensive library of 1,500+ exam-like questions and get your Alaska ELDT certification online. Official FMCSA-approved national Entry-Level Driver Training provider.
Pass the first time, guaranteed
List of questions (classic view)
- How would you check your truck's slack adjusters?
- At what measurement is the safety valve USUALLY set to open?
- How can you tell if your vehicle is equipped with an antilock braking system (ABS)?
- How do brakes work on a long, steep downgrade?
- Slack adjusters are
- Spring brakes are
- After the initial drop, the maximum acceptable leakage rates per minute are
- The purpose of a supply pressure gauge is
- The tractor protection valve
- What is the best way to test if your vehicle's spring brakes come on automatically?
- What is the best way to test your vehicle's low air pressure warning signal?
- When should you drain your air tanks?
- When should you use the parking brake?
- Under which conditions are front wheel brakes good to use?
- An antilock braking system (ABS)
- Which of the following can cause brakes to fade or fail?
- If the air tanks are not drained,
- Which of the following is NOT part of the air brake system?
- 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 is NOT part of the drum brake?
- Which of the following are true about a dual air brake system?
- 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 vehicles must have low air pressure warning signals?
- 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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