CDL AIR BRAKES PRACTICE TEST - NEW JERSEY

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The air brakes endorsement applies to applicants who wish to drive a vehicle with air brakes in Class A, B, or C CDL. To drive a vehicle with air brakes, you must pass the air brake component of the New Jersey CDL knowledge test. The NJ CDL air brakes test consists of 25 questions, and you'll need at least 20 correct answers to pass (80%). The test covers the information found in the air brakes section of the New Jersey CDL Manual. Take this NJ CDL practice test now to prepare for the actual air brakes test!
1. Which of the following is not a type of retarder?
Hydraulic
Electric
Pressure
Exhaust
2. The best way to recognize that your trailer has started to skid is:
by seeing it in your mirrors.
by recognizing tire failure.
by opening the window and feeling the front of the mirror.
by feeling the brakes come on.
3. If the low air pressure warning light comes on, you should:
stop immediately.
continue to drive normally.
call for help.
set the parking brake.
4. With the air pressure built up to governor cutoff, the maximum leakage rates per minute are ___ psi for single vehicles and ___ psi for a combination of 2 vehicles.
5; 6
3; 2
4; 5
3; 4
5. When the spring brakes are on, you should never:
decrease your speed.
push the brake pedal down.
change lanes.
upshift.
6. In vehicles with air brakes, the two markings on a front brake limiting valve are:
normal and slippery.
left and right.
wet and dry.
high and low.
7. You are coming down a long, steep downgrade. Which of the following is a sign that your brakes may have started to fade?
The brake pedal feels spongy or goes to the floor.
The steering feels heavy.
You hear a loud "bang".
You have to apply your brakes harder and harder to get the same stopping power.
8. When backing a trailer, turn the wheel right to make the cab go ________ and the trailer go ________.
left; left
right; right
right; left
left; right
9. Front wheel braking is good:
under all conditions.
Never.
only in wet conditions.
only in good weather.
10. When driving a 60 foot truck at 35 mph in ideal conditions, you should keep at least _______ of space in front of you.
5 seconds
4 seconds
12 seconds
6 seconds
 
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Frequently Asked Questions

New Jersey residents who have never had a class D driver license must follow the age requirements of the Graduated Driver License (GDL) program. There are three options:
  1. If you are 16 and enrolled in an approved behind-the-wheel driver training course, you can apply for a special learner permit. When you reach 17, you are ready to apply for a probationary license after practicing for at least six months. After one year of unsupervised driving, you can get a basic driver license at 18.
  2. If you are not enrolled in a driver course, you can obtain an examination permit at least at 17 years old. After six months of supervising driving, you can get a probationary license. After one year of unsupervised driving, you can get a basic driver license at 18.
  3. If you are 21 years old, after obtaining the permit and three months of supervising driving, you can get a probationary license. After one year of unsupervised driving, you can get a basic driver license.


If you are enrolled in a driver education class, you can schedule your DMV written test at the driving school. Alternatively, you can purchase an examination permit at a New Jersey driver testing center and then make an appointment for the knowledge test.

To complete the 6 Point ID Verification by presenting documents that prove your age, identity, and legal presence in the United States,  you must provide the following documents:
  • One primary document and one secondary document.
  • One proof of NJ address.
  • Proof of SSN or ITIN (Individual Taxpayer Identification Number) or a signed affidavit.
  • Proof of your legal presence in the US (for non-citizen applicants).
Use this guide to ensure you have the necessary documentation.

The DMV written tests in New Jersey are available in multiple languages: English, Arabic, Chinese (Mandarin), French, Spanish, Korean, Polish, Portuguese, Russian, Japanese, Hindi, Albanian, and Turkish. Additionally, oral tests are offered in both English and Spanish. If the test is not provided in your native language, or if you are deaf or hard of hearing, you may request an interpreter approved by the Motor Vehicle Commission at least two weeks before taking the exam. Interpreter's fees will be paid by the Motor Vehicle Commission (MVC).
The DMV written test covers road rules, safe driving practices, and road signs. Studying the official New Jersey Driver’s Handbook is the first step to pass the exam because it contains all of this information. Once you've read it, you can take our free practice tests to test your preparation!

The DMV written test in New Jersey consists of 50 questions covering topics such as traffic laws, vehicle handling, recognizing road signs, etc. If you have carefully read the manual and taken various practice tests, you should be able to answer each question without any problem.

To pass the DMV written test, you need a score of 80% or higher. You should get at least 40 questions right, and you're allowed to miss up to 10 questions out of the total 50. Stay focused and take the time to read the questions carefully.

If you have a special learner permit or an examination permit, these are the specific restrictions:
  • You must be accompanied in the front seat by a driver aged 21 years old or older with a valid license for at least 3 years.
  • Driving is prohibited between 11:01 p.m. and 5:00 a.m.
  • Using cell phones or electronic devices is forbidden.
  • You can transport only siblings and one additional passenger (unless accompanied by a parent/guardian for examination permit holders).
  • All occupants must wear seat belts.
  • You must display decals on license plates.
If you have a probationary driver license, these are the specific restrictions:
  • Driving alone is prohibited between 11:01 p.m. and 5:00 a.m.
  • Using cell phones or electronic devices is forbidden.
  • You can transport only siblings and one additional passenger, unless accompanied by a parent/guardian.
  • You must display decals on license plates.
If you are 21 years of age or older, these restrictions do not apply.

The student learner’s permit expires after 2 years, while the examination permit has distinct validity periods: it is valid for 90 days for applicants who don't follow the Graduated Driver License Program and for 2 years for those who adhere to the GDL Program.

If you don't pass your online DMV written test in New Jersey, you'll need to wait for 7 days before trying again. If you find the exam difficult, sign up for DMV Premium, which offers numerous resources and practice tests to improve your preparation.

NJ CDL Air Brakes Test

Number of questions: 25
Correct answers to pass:20
Passing score:80%
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