Free New Mexico DMV CDL — General Knowledge Practice Test 2026
The New Mexico CDL — General Knowledge knowledge test has ~50 questions, and you need ~40 correct (80%) to pass. Practice free with questions written from the official New Mexico driver handbook — every one has a clear explanation, and you can retake as often as you like with no sign-up.
Content reviewed against official driver handbooks · August 12, 2026
What's on the New Mexico written test
The New Mexico CDL — General Knowledge knowledge test has ~50 questions; you need ~40 correct (80%) to pass.
Based on the official New Mexico exam format — always confirm current details with your state DMV.
Practice by topic
Focus on one area at a time — each topic has its own set of New Mexico practice questions.
Learn the shapes, colors, and meanings of regulatory, warning, and guide signs — from stop and yield to construction and school-zone signs.
Speed limits, turning and signaling rules, headlight and seat-belt requirements, and the everyday laws every driver must follow.
How to read traffic signals, lane lines, and pavement markings — including yellow and white lines, arrows, and flashing lights.
Who goes first at intersections, four-way stops, roundabouts, and crosswalks, and how to yield to pedestrians and emergency vehicles.
Following distance, scanning, blind spots, using your lights, and the habits that prevent crashes and keep you in control.
Driving safely around motorcycles, bicycles, large trucks, pedestrians, and school buses — and knowing who has the right of way.
Blood alcohol limits, zero-tolerance and implied-consent laws, and how alcohol and drugs — legal or not — affect your driving.
Legal and illegal parking, colored curbs, distances from hydrants and crossings, and how to park safely on hills.
Choosing a safe speed, keeping a space cushion, adjusting for weather and traffic, and understanding stopping distance.
What to do when things go wrong — brake failure, tire blowouts, skids, and stalling on railroad tracks.
The point system, license suspension, provisional-license rules, insurance requirements, and other licensing basics.
How to pass the first time
- Read the official New Mexico driver handbook at least once before test day.
- Practice by topic to find your weak spots, then fix them.
- Take full-length practice tests until you pass comfortably every time.
- Read every explanation — understanding beats memorizing.
New Mexico CDL — General Knowledge test — frequently asked questions
How many questions are on the New Mexico CDL — General Knowledge test?
The New Mexico CDL — General Knowledge knowledge test has ~50 questions, and you need ~40 correct (80%) to pass. Our practice tests mirror that format.
How many questions can I miss on the New Mexico CDL — General Knowledge test?
You can miss up to ~10 of the ~50 questions and still pass — you need ~40 correct, which is 80%.
Can I retake the practice test?
Yes — practice as often as you like, completely free. The questions and answer choices are shuffled each time.
Can I take the New Mexico practice test in Spanish?
Yes. Every question here is available in English and Spanish — switch languages anytime. Many states also offer the real knowledge test in languages other than English; confirm what New Mexico offers with your DMV.
Can I practice on my phone?
Yes. The practice tests work in any mobile or desktop browser — no app or sign-up needed — so you can study anywhere.
Are these the real DMV test questions?
No. Our questions are original, written from the current official New Mexico driver handbook to match the real test's topics and style. We are not affiliated with any DMV or government agency.
What's the best way to study?
Read the New Mexico driver handbook, practice by topic to target weak areas, and finish with full-length tests until you consistently pass.
Other New Mexico practice tests
Take the CDL — General Knowledge test in another state
Every New Mexico question is written from the official New Mexico driver handbook and checked against its current edition. DMV Test Free is a free, independent study resource — not affiliated with any DMV or government agency. About DMV Test Free
New Mexico CDL — General Knowledge questions with answers
20 sample questions from the New Mexico CDL — General Knowledge question bank — each with the correct answer, a short explanation, and the section of the official handbook it comes from.
Show all 20 questions with answers
1. How does hauling placarded hazardous materials change the minimum CDL loss for a first alcohol offense in a CMV?
Correct answer: It rises from one year to three years
A first offense such as driving a CMV at .04% BAC or higher costs the CDL for at least one year, and at least three years when the CMV is placarded for hazardous materials.
Source: New Mexico Commercial Driver License Manual — Section 1.3.2, Alcohol, Leaving the Scene of an Accident, and Commission of a Felony
2. Your CDL road test route has no railroad crossing. How may the examiner still score your crossing procedure?
Correct answer: By having you explain and demonstrate it at a simulated location
Not every route includes a crossing, so the examiner can have you talk through and act out the correct procedure at a simulated spot.
Source: New Mexico Commercial Driver License Manual — Section 13.1.8, Railroad Crossing
3. The one-year disqualification for cheating on a New Mexico CDL test has ended. What does reapplying for the CDL involve?
Correct answer: A full retest
Once the year is up the disqualified applicant may reapply, and the manual describes that reapplication as a full retest.
Source: New Mexico Commercial Driver License Manual — CDL Licensing Information, CDL Knowledge Tests
4. Which hydraulically braked vehicles does the Department of Transportation require to have ABS?
Correct answer: Trucks and buses rated at 10,000 pounds GVWR or more and made March 1, 1999 or later
The 1997 date applies to air-braked truck tractors and 1998 to other air brake vehicles; for hydraulic brakes the requirement starts with 10,000-pound-and-up trucks and buses built from March 1, 1999.
Source: New Mexico Commercial Driver License Manual — Section 2.18.2, Vehicles Required to Have Antilock Braking Systems
5. Where is a tire's load rating, the most weight it can safely carry at a specified pressure, stated?
Correct answer: On the side of each tire
Tire load is the maximum safe weight for a tire at a given pressure, and the rating is printed on the tire's sidewall.
Source: New Mexico Commercial Driver License Manual — Section 3.2.1, Definitions You Should Know
6. Hazardous materials shipping papers are mixed in with other paperwork. Besides marking them so they can be identified, what does the manual allow?
Correct answer: Keeping them on top of the other shipping papers
So responders can find them fast, hazardous materials papers must be identified or kept on top of the rest.
Source: New Mexico Commercial Driver License Manual — Section 2.23.2, Why Are There Rules?
7. On the inspection test, the check of lights and reflectors on the sides and rear also covers the condition of what?
Correct answer: Reflector tape
The item is headed lights, reflectors and reflector tape condition for the sides and rear, and all reflective equipment must be clean, functional and in place.
Source: New Mexico Commercial Driver License Manual — Section 11.1.2, Cab Check/Engine Start
8. What does the manual say a driver can do with the 'TAT-Trained' designation?
Correct answer: Put it on a resume
TAT-Trained is described as a designation that can go on your resume.
Source: New Mexico Commercial Driver License Manual — Everyday Heroes Needed
9. New Mexico's license class chart says the holder of a Class C license may also operate which vehicles?
Correct answer: All vehicles within Class D
The chart notes that Class C holders may drive every vehicle in Class D. Class A and B holders may drive lesser classes with the appropriate endorsements.
Source: New Mexico Commercial Driver License Manual — CDL Licensing Information, Vehicle Groups and Endorsements
10. During a basic control skills exercise you stop, then drive forward to fix an encroachment or improve your angle. What is that called, and how is it scored?
Correct answer: A pull-up; initial ones are not penalized, but an excessive number count as errors
Stopping and pulling forward is a pull-up. You are not penalized for the first ones, but too many are scored as errors.
Source: New Mexico Commercial Driver License Manual — Section 12.1, Scoring
11. Why does the manual say brake adjustment must be checked frequently?
Correct answer: Brakes can go out of adjustment quickly, especially with heavy use, and hot linings wear faster
Every brake must do its share, yet heavy use knocks brakes out of adjustment fast and heat speeds lining wear, so frequent checks are needed.
Source: New Mexico Commercial Driver License Manual — Section 2.16.3, Brake Fading or Failure
12. In the sleep poll cited by the manual, about what share of Americans said they had actually nodded off at the wheel?
Correct answer: More than one third (36 percent)
The poll found 60% had driven while sleepy, and more than a third, 36 percent or about 103 million people, admitted they had actually dozed off while driving.
Source: New Mexico Commercial Driver License Manual — Section 2.11.2, Driver Factors
13. You take the road test in a bus and stop at a railroad crossing. Besides looking and listening, what may you also be required to do before crossing?
Correct answer: Open the window and the door
For bus drivers, the railroad crossing procedure adds that the examiner may have you open the window and the door before you cross.
Source: New Mexico Commercial Driver License Manual — Section 13.1.8, Railroad Crossing
14. A New Mexico CDL shows restriction V. What does the MVD's list say that code indicates?
Correct answer: A medical variance: a federal waiver or exemption tied to a physical or vision condition
V stands for medical variance, explained on the list as a federal exemption or waiver covering a physical or vision condition.
Source: New Mexico Commercial Driver License Manual — CDL Licensing Information, Restrictions
15. Your vehicle starts to hydroplane. How does the manual say you can regain control?
Correct answer: Release the accelerator and push in the clutch
Coming off the accelerator with the clutch in slows the vehicle and lets the wheels spin freely; the brakes should not be used to slow down.
Source: New Mexico Commercial Driver License Manual — Section 2.6.2, Matching Speed to the Road Surface
16. When you carry tire chains for winter, which tires does the manual say they must fit?
Correct answer: The drive tires
Chains go on the drive tires, so check the fit ahead of time and bring enough chains along with spare cross-links.
Source: New Mexico Commercial Driver License Manual — Section 2.13.1, Vehicle Checks
17. Which hazard class on the manual's table uses ammonium nitrate and hydrogen peroxide as its examples?
Correct answer: Class 5, Oxidizers
The table lists Class 5 as Oxidizers and gives ammonium nitrate and hydrogen peroxide as examples.
Source: New Mexico Commercial Driver License Manual — Section 2.23.3, Lists of Regulated Products
18. On the basic control skills test, how is touching or crossing an exercise boundary line or cone scored?
Correct answer: Each encroachment counts as an error
The examiner tallies every time any part of the vehicle touches or crosses a boundary line or cone, and each one is an error.
Source: New Mexico Commercial Driver License Manual — Section 12.1, Scoring
19. Which of these is NOT among the manual's suggestions for reducing the chance of a crash when you are being tailgated?
Correct answer: Tapping the brakes sharply to make the tailgater back off
The suggestions are to avoid quick changes, open up room ahead, hold your speed down, and avoid tricks such as flashing your brake lights.
Source: New Mexico Commercial Driver License Manual — Section 2.7.2, Space Behind
20. Whose certification that a driver finished entry-level driver training can be filed with the Training Provider Registry?
Correct answer: Only a registered training provider's
Entry-level drivers must pick a provider listed on the registry, because only registered providers can submit the completion certification.
Source: New Mexico Commercial Driver License Manual — Entry-Level Driver Training Requirements for CDL Applicants