CDL AIR BRAKES PRACTICE TEST - NEW MEXICO

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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 Mexico CDL knowledge test. The NM 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 Mexico CDL Manual. Take this NM CDL practice test now to prepare for the actual air brakes test!
1. When you release the brake pedal, the _____ rotates back and a spring pulls the brake shoes away from the drum.
air compressor belt
pressure gauge
S-cam
2. Before driving a truck or bus with a dual air brake system, the minimum pressure in both the primary and secondary systems should be at least:
100 psi.
75 psi.
130 psi.
3. You are driving a vehicle with air brakes when the low air pressure warning light and buzzer come on. You should:
slow down and test your brakes.
pull off the road and stop immediately.
activate your hazard lights and drive to the nearest place where you can stop.
4. The tractor protection valve:
provides the air supply for the brake system.
will close automatically if the air pressure drops to a certain level.
All of the above.
5. What is a dual air brake system?
2 separate air brake systems: one system operates the left brakes, the other system operates the right brakes.
2 separate air brake systems: one system operates the front brakes, the other system operates the rear brakes.
2 separate air brake systems: one system for daytime driving, the other system for nighttime driving.
6. If you get stuck on railroad tracks, you should:
have a helper push your vehicle.
stay in the vehicle and call for help.
get out of the vehicle and away from the tracks.
7. If an aggressive driver is involved in an accident down the road, you should:
stop a safe distance from the accident scene, wait for the police and report the behavior you witnessed.
confront the aggressive driver.
try to get their vehicle to the side of the road.
8. After starting the engine, oil pressure should rise to a normal level:
within 6 minutes.
within seconds.
within 2 minutes.
9. When coupling, you should:
make sure the trailer kingpin is bent.
make sure the trailer wheels are not chocked.
be aware that wrong coupling and uncoupling can be very dangerous.
10. You hear a loud "bang" which sounds like a tire blowout. You should:
keep driving as normal.
assume you have a tire failure.
check the tires at the next stop.
 
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Frequently Asked Questions

If you are under 18, you must follow the Graduated Driver Licensing (GDL) Program. Here are the three phases of the program and the required age: 
  • For an instructional permit, you must be at least 15 years old.
  • For a provisional license, you must be 15 ½ years old and have held the permit for six months.
  • For a full license, you must hold the provisional license for 12 months.
If you are between 18 and 24, you can obtain your driver’s license (class D) after passing the required tests and completing the None for the Road - DWI Awareness Program.

You have the option of taking the MVD written test at a New Mexico Motor Vehicle Division (MVD) location or a contracted driver education provider. Contact your driving school or schedule an appointment online at a MVD branch, choosing the date and time that suits you best. It's important to note that appointments can be scheduled up to 30 days in advance.

Bring the following documents:
  • One proof of identification number (for REAL ID drivers' license).
  • One proof of identity and age.
  • Two proofs of New Mexico residency.
  • Proof of being enrolled in a state-approved driver education program (for minors).
  • Proof that you have completed the None for the Road course, a self-taught DWI course (if you are between 18 and 24 years old, or if you are 25 or above convicted of DUI). 
If you are under 18, you and your parent/guardian must sign the application at the MVD office.

The MVD written test in New Mexico is offered in various languages, including English, Spanish, Tagalog, Italian, German, French, Vietnamese, and Chinese. Although language options are provided, it is advisable to have a basic understanding of English since road signs are always in English.

To prepare for the MVD written test, read the New Mexico Driver's Handbook. Study road signs, parallel parking, turning, passing a vehicle, yielding the right of way, etc. Test your knowledge with our free practice tests or sign up for DMV Premium to access additional resources. Once you are satisfied with your score, you are ready for the exam.

The New Mexico MVD written test comprises 25 questions. It is designed to evaluate your knowledge of road rules, safe driving practices, and traffic signs. You should study the manual carefully to ensure your success on the first attempt.

You must answer at least 18 questions correctly, and you can miss up to 7 questions to pass the MVD written test. The minimum score required to succeed in the exam is 70%. Take your time during the exam to make sure you understand the questions well.

When holding an instructional permit in New Mexico, new drivers must be accompanied by an approved driving instructor seated beside them or by an adult who is 21 years or older with a driver's license for at least 3 years. Upon obtaining a provisional license, drivers can drive alone, except between midnight and 5 a.m., unless:
  • under the supervision of a driver aged 21 or older. 
  • for family or medical emergencies.
  • for work/school/religious activities.

In New Mexico, an instruction permit is valid for 4 years and can be renewed by the MVD. This ensures you have enough time to practice driving and fulfill the necessary requirements before the road test.
If you do not pass your MVD written test on the first attempt, you have the opportunity to retake the test on the same day. However, if you do not succeed on the second try, you have to wait one week before making another attempt. In the event of a third unsuccessful attempt, a waiting period of six months is required before you can retake the exam.

NM CDL Air Brakes Test

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