New Mexico CDL Practice Test: General Knowledge (NM) 6

5 out of 5 (48 votes)
80% Passing score
50 Questions
10 Mistakes allowed
Are you preparing for your CDL General Knowledge test? Our sixth New Mexico CDL practice test is here to assist you in acing your DMV test with confidence. This CDL practice test is specifically designed to mirror the structure and content of the actual DMV written test, featuring 50 carefully selected driving test questions and answers that comprehensively cover essential topics for commercial drivers. Understanding that mastery comes with practice, we offer you the flexibility to take this NM CDL practice test multiple times. This repetition ensures that you are not only familiar with the sample questions but also comfortable with the test format, boosting your chances of passing the real New Mexico CDL permit test. One of the key features of our online NM CDL practice test is its diverse range of questions. We delve into various subjects crucial for any commercial driver, such as detailed vehicle equipment knowledge, effective strategies for emergency situations, proper procedures in the event of an accident, thorough pre-trip inspection methods, and an introduction to handling hazardous materials. Although the HazMat endorsement is not the focus at this stage, it's vital for all drivers to have basic knowledge in this area. Tailored specifically for New Mexico, our CDL general knowledge practice test includes 2026 state-specific questions and answers. This means you'll be tested on the unique road signs, rules, and regulations that apply within the state, providing you with a realistic and relevant practice experience. Remember, this is more than just a DMV practice test; it's a crucial step in ensuring you're well-prepared for your New Mexico CDL General Knowledge test. So, take advantage of this opportunity to familiarize yourself with the type of permit test questions you'll encounter, refine your knowledge, and walk into your DMV written test with confidence!
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Sample New Mexico CDL Test Questions - General Knowledge

Question 1

In a manual-transmission CMV stopped uphill, what should you do before moving your right foot from the brake to the accelerator?

  1. A. Place a wheel chock ahead of a front tire
  2. B. Place a wheel chock behind a rear tire
  3. C. Partly engage the clutch
  4. D. Release the parking brake before applying engine power

Correct answer: C. – Partly engage the clutch

Partly engaging the clutch before moving your right foot from the brake helps prevent a manual-transmission vehicle from rolling backward. The parking brake may also be used when necessary, but it should remain applied until enough engine power is being delivered to prevent rollback. Starting carelessly could allow the vehicle to strike someone behind it.

Source: New Mexico Commercial Driver’s License Manual — § 2.2.1, “Accelerating”

Question 2

Before making a permitted right turn at a steady red signal, what must the driver do first?

  1. A. Enter the crosswalk to check for traffic
  2. B. Sound the horn and begin turning
  3. C. Wait for cross traffic to slow without stopping
  4. D. Come to a complete stop

Correct answer: D. – Come to a complete stop

New Mexico law requires the driver to stop before entering the near-side crosswalk or, if there is no crosswalk, before entering the intersection. A right turn may then be made only when the intersection can be entered safely. The driver must yield to pedestrians and vehicles lawfully in or approaching the intersection, and a posted sign may prohibit the turn.

Source: NMSA 1978 § 66-7-105(C)(1) — Traffic-Control Signal Legend

Question 3

Whenever possible, how should you position a combination vehicle before backing its trailer?

  1. A. So the trailer can be backed in a straight line
  2. B. So the trailer must turn toward the passenger side
  3. C. So the mirrors are unnecessary
  4. D. At a sharp angle to shorten the maneuver

Correct answer: A. – So the trailer can be backed in a straight line

Position the vehicle to back the trailer in a straight line whenever possible. Straight-line backing is easier to control and reduces the steering corrections needed to keep the trailer on the intended path. If curved backing is unavoidable, backing toward the driver’s side provides better visibility.

Source: New Mexico Commercial Driver’s License Manual — § 6.1.7, “Backing with a Trailer”

Question 4

A curve warning sign has a 40 mph maximum-safe-speed plaque. What does the plaque indicate?

This sign warns drivers to _______________.
  1. A. Vehicles below 40 mph must remain in the right lane
  2. B. Drivers must maintain at least 40 mph
  3. C. The displayed maximum safe speed for the curve is 40 mph
  4. D. Commercial vehicles should exceed 40 mph through the curve

Correct answer: C. – The displayed maximum safe speed for the curve is 40 mph

The plaque identifies 40 mph as the maximum safe speed shown for the curve. A commercial vehicle may need to travel more slowly because of its weight, load, center of gravity, weather, or road conditions. On a New Mexico roadway, reduce speed before entering the curve and never exceed the displayed maximum safe speed.

Source: New Mexico Commercial Driver’s License Manual — § 2.6.3, “Speed and Curves”, New Mexico Commercial Driver’s License Manual — § 2.6.6, “Speed on Downgrades”

Question 5

A CDL driver in New Mexico may operate while affected by a drug that makes safe vehicle operation impossible.

  1. A. Yes, if the drug was prescribed
  2. B. No, this is prohibited
  3. C. Yes, if it is an over-the-counter cold or diet medicine
  4. D. Yes, if the drug is combined with only a small amount of alcohol

Correct answer: B. – No, this is prohibited

Federal regulations prohibit an on-duty driver from using or being under the influence of a substance to a degree that makes the driver incapable of safe operation. The prescription exception applies only when a licensed medical practitioner has advised that the substance will not affect safe driving. Alcohol can intensify the effects of other drugs and does not make their use acceptable.

Source: 49 CFR § 392.4(a), (c) — Drugs and Other Substances, New Mexico Commercial Driver’s License Manual — § 2.22.2, “Other Drugs”

Question 6

What is the recommended way to hold a commercial vehicle’s steering wheel?

  1. A. Firmly with both hands on opposite sides
  2. B. Firmly with only the dominant hand
  3. C. Loosely with both hands near the bottom
  4. D. Loosely with only the dominant hand

Correct answer: A. – Firmly with both hands on opposite sides

Hold the steering wheel firmly with both hands positioned on opposite sides. A pothole, curb strike, tire failure, or other sudden force can pull the wheel sharply. A secure two-handed grip gives the driver a better opportunity to maintain directional control and respond smoothly.

Source: New Mexico Commercial Driver’s License Manual — § 2.2.2, “Steering”

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