New Mexico CDL Class B Practice Test (NM) 3

5 out of 5 (52 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Are you preparing for your CDL Class B test? Our third New Mexico CDL practice test is designed to set you up for success in 2026! This 20-question test is a crucial step in your preparation, especially for those aiming for a Class B CDL. You'll need to correctly answer at least 16 DMV questions to pass, but remember, practice makes perfect! Our NM CDL class B practice test covers a comprehensive range of topics. From pre-trip vehicle inspection to basic vehicle control, and from gear shifting techniques (including downshifting) to handling hills and steep downgrades, we've got it all. It's not just about maneuvering the vehicle; communication with fellow drivers, speed control, and even drug and alcohol awareness are essential parts of the CDL practice test. This breadth of topics ensures that you're well-prepared for any question the real DMV written test might throw at you. One of the unique features of our NM CDL practice test is its customizable nature. You can focus on specific areas where you need more practice. Repeat the DMV practice test as many times as you need, and at times that suit you best. This flexibility allows for a more personalized and effective study experience. After completing the practice test, you'll receive a detailed summary of your performance. This summary isn't just a score; it highlights the questions you missed and provides the correct answers. This immediate feedback is an invaluable learning tool, helping you understand your mistakes and ensuring you don't repeat them. Our New Mexico CDL practice tests are designed to mirror the actual 2026 CDL Class B test in both format and content. This similarity is key in helping you become familiar with the question types and subject matter you'll encounter on test day. It's not just about passing the CDL practice test; it's about building the knowledge and confidence you need to succeed in your actual NM DMV CDL test in 2026!
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Sample New Mexico CDL Test Questions - General Knowledge

Question 1

Which pair of drinks contains approximately the same amount of alcohol?

  1. A A 12-ounce 5% beer and a 3-ounce shot of 80-proof liquor
  2. B A 12-ounce 5% beer and a 1.5-ounce shot of 80-proof liquor
  3. C A 5-ounce glass of 12% wine and a 12-ounce shot of liquor
  4. D A 12-ounce 5% beer and a nonalcoholic beverage

Correct answer: B – A 12-ounce 5% beer and a 1.5-ounce shot of 80-proof liquor

A 12-ounce serving of 5% beer contains approximately the same alcohol as a 5-ounce glass of 12% wine or a 1.5-ounce shot of 80-proof liquor. The beverage type does not prevent impairment when the alcohol amounts are equivalent. Coffee, exercise, or fresh air cannot speed the body’s removal of alcohol.

Source: New Mexico Commercial Driver’s License Manual — § 2.22.1, “Alcohol and Driving”

Question 2

If a CMV operated in New Mexico uses reflective triangles as its required stopped-vehicle warning devices, how many must it carry?

  1. A 1
  2. B 2
  3. C 3
  4. D 4

Correct answer: C – 3

Federal regulations require three bidirectional emergency reflective triangles when that warning-device option is used. The triangles must conform to the applicable federal safety standard. Other permitted equipment options exist, but a vehicle relying on reflective triangles must have a complete set of three.

Source: New Mexico Commercial Driver’s License Manual — § 2.1.4, “Emergency Equipment”, 49 CFR § 393.95(f) – Emergency Equipment on All Power Units

Question 3

In ideal conditions, what minimum following interval is recommended for a 40-foot vehicle traveling at 45 mph?

  1. A 2 seconds
  2. B 3 seconds
  3. C 4 seconds
  4. D 5 seconds

Correct answer: D – 5 seconds

A 40-foot vehicle needs four seconds under the basic one-second-per-10-feet guideline. Because the speed is above 40 mph, one additional second is added. The recommended minimum following interval under the stated ideal conditions is five seconds.

Source: New Mexico Commercial Driver’s License Manual — § 2.7.1, “Space Ahead”

Question 4

At a railroad crossing, a train is approaching and the gate and flashing red lights are active. What should you do?

  1. A Accelerate and cross before the train arrives
  2. B Proceed if you do not hear a horn
  3. C Drive around the gate after the first train passes
  4. D Remain stopped until the gate rises and the lights stop, then proceed when safe

Correct answer: D – Remain stopped until the gate rises and the lights stop, then proceed when safe

Stop when the red lights begin flashing and before the gate lowers across your lane. Remain stopped until the gate rises and the lights have stopped flashing, then proceed only when it is safe. Never race a train or drive around a lowered crossing gate.

Source: New Mexico Commercial Driver’s License Manual — § 2.15.2, “Warning Signs and Devices”, New Mexico Commercial Driver’s License Manual — § 2.15.3, “Driving Procedures”

Question 5

What time interval represents the recommended distance for looking ahead while driving?

  1. A 1 to 2 seconds
  2. B 5 to 8 seconds
  3. C 12 to 15 seconds
  4. D 18 to 21 seconds

Correct answer: C – 12 to 15 seconds

Most good drivers look at least 12 to 15 seconds ahead. The distance varies with speed because it is based on how far the vehicle will travel during that time. Continue checking nearby traffic while shifting your attention between near and distant conditions.

Source: New Mexico Commercial Driver’s License Manual — § 2.4.1, “Seeing Ahead”

Question 6

If a collision is imminent and there is not enough room to stop, which statement is correct?

  1. A Steering around the obstacle may be quicker than stopping
  2. B Full braking is always the safest response
  3. C Leaving the roadway is always worse than a collision
  4. D The driver should release the seat belt before impact

Correct answer: A – Steering around the obstacle may be quicker than stopping

When stopping distance is insufficient, steering away from the obstacle may avoid the collision more quickly. A quick turn must be controlled, using no more steering than necessary and preparing to counter-steer. Drivers of top-heavy vehicles and tractors with multiple trailers must consider the increased rollover risk.

Source: New Mexico Commercial Driver’s License Manual — § 2.17.1, “Steering to Avoid a Crash”

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