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Free North Dakota CDL Air Brakes Test 2025
Part of mandatory Entry-Level Driver Training Course Based on 2025 ND commercial driver's license manualAvailable in EN, ES
30questions
6mistakes allowed
80%passing score
Today, you will have an opportunity to take a practice quiz on an important area of commercial vehicle driving: air brakes. Passing the DMV exam about this subject will allow you to get a CDL without an air brake restriction and will open up more career opportunities. The 30 multiple-choice questions on this practice exam are based on practice problems provided in the North Dakota Commercial Drivers License Guide, so pay close attention not only to the questions, but read each explanation provided, as it will help you understand the subject material you will need to pass the real DMV exam. Practice as often as necessary until you feel comfortable, good luck both now and on that future exam, and drive safely!
Perfect for
- First-time ND CDL and CLP applicants
- CDL holders adding endorsements
- ND 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 North Dakota. Pass Guarantee
Become a member to unlock our extensive library of 1,500+ exam-like questions and get your North Dakota ELDT certification online. Official FMCSA-approved national Entry-Level Driver Training provider.
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List of questions (classic view)
- How can you tell if your vehicle is equipped with an antilock braking system (ABS)?
- The purpose of a supply pressure gauge is
- Slack adjusters are
- Which of the following are true about a dual air brake system?
- Spring brakes are
- The tractor protection valve
- When should you use the parking brake?
- 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?
- An antilock braking system (ABS)
- At what measurement is the safety valve USUALLY set to open?
- Which vehicles must have low air pressure warning signals?
- After the initial drop, the maximum acceptable leakage rates per minute are
- Which of the following will be true about your brake function if your antilock braking system (ABS) fails?
- How would you check your truck's slack adjusters?
- Which of the following should you do before leaving your vehicle unattended?
- When should you drain your air tanks?
- Under which conditions are front wheel brakes good?
- How do brakes work on a long, steep downgrade?
- Which of the following can cause brakes to fade or fail?
- What is the best way to test if your vehicle's spring brakes come on automatically?
- Why must you pass a knowledge test on air brakes?
- What is the best way to test your vehicle's low air pressure warning signal?
- Which of the following is NOT part of the air brake system?
- If the air tanks are not drained,
- 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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