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Free Ohio CDL Air Brakes Test 2025
Part of mandatory Entry-Level Driver Training Course Based on 2025 OH commercial driver's license manualAvailable in EN, ES
30questions
6mistakes allowed
80%passing score
Today, you will have an opportunity to not only become a safer commercial driver, but to also get a less restricted CDL in the state of Ohio. In order to have CDL without the air brakes restriction, you must correctly answer exam questions about air brakes. This 30-question practice exam, which is based closely on practice questions directly from the Ohio Commercial Driver License Handbook, will allow you become comfortable not only with the format of the exam (multiple-choice) and the subject matter, through answering questions and reading each explanation that comes with the questions. Soon, you will be able to receive the score that you want on your air brakes exam and you’ll be a safer, less limited Ohioan commercial driver, so good luck!
Perfect for
- First-time OH CDL and CLP applicants
- CDL holders adding endorsements
- OH 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 Ohio. Pass Guarantee
Become a member to unlock our extensive library of 1,500+ exam-like questions and get your Ohio ELDT certification online. Official FMCSA-approved national Entry-Level Driver Training provider.
Pass the first time, guaranteed
List of questions (classic view)
- When should you use the parking brake?
- Spring brakes are
- Why must you pass a knowledge test on air brakes?
- Which vehicles must have low air pressure warning signals?
- Which of the following is NOT part of the drum brake?
- When should you drain your air tanks?
- Which of the following should you do before leaving your vehicle unattended?
- What is the best way to test if your vehicle's spring brakes come on automatically?
- How do brakes work on a long, steep downgrade?
- Slack adjusters are
- How would you check your truck's slack adjusters?
- Under which conditions are front wheel brakes good?
- If the air tanks are not drained,
- How can you tell if your vehicle is equipped with an antilock braking system (ABS)?
- The tractor protection valve
- The purpose of a supply pressure gauge is
- An antilock braking system (ABS)
- 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 will be true about your brake function if your antilock braking system (ABS) fails?
- What is the best way to test your vehicle's low air pressure warning signal?
- Which of the following can cause brakes to fade or fail?
- At what measurement is the safety valve USUALLY set to open?
- After the initial drop, the maximum acceptable leakage rates per minute are
- Which of the following are true about a dual air brake system?
- 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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