Knowledge Test Class B #1
Class B Driving Test | New Mexico 2025 #1 Page 4 of 7
Train for FREE online with our New Mexico class B license test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a NM CDL class B permit in 2025, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that CDL class B requirements may vary from state to state.
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22 . An alcohol evaporator is especially important:
Some air brake systems contain an alcohol evaporator. This evaporator introduces alcohol into the system to help prevent ice from forming in cold weather.
23 . When loading a trailer, you should:
A load of cargo must be properly balanced. Placing too much weight over an axle can damage the axle and make it more difficult for you to steer. Placing too little weight over an axle can cause poor traction, also leading to difficult handling.
25 . What can happen if the exhaust system is not working properly?
Leaks in an exhaust system are extremely dangerous because they may allow toxic fumes into the cab or sleeper berth, endangering drivers and passengers.
26 . When checking power steering hoses during a pre-trip inspection, you should look for:
When doing a pre-trip inspection on a vehicle with power steering, be sure to check the hoses, pumps, and fluid level. In particular, you should check the hoses for leaks.
27 . If involved in an accident, which of the following is not recommended?
When involved in an accident, you should protect the area, notify authorities, care for the injured, collect required information, and report the accident. You can lose your license for leaving the scene of an accident.
28 . Foundation brakes are used:
Foundation brakes are used on each wheel of a CMV. The most common type of foundation brake is the s-cam drum brake.
See the exact questions that will be on the 2025 New Mexico DMV exam.
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Lillian MCcranie explains how our CDL study guide was helpful in passing the exam and recommends it to everyone.
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2025 New Mexico | Frequently Asked Questions
A CDL Class A license in New Mexico allows the holder to operate any combination of vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 lbs or more, provided the Gross Vehicle Weight Rating (GVWR) of the vehicle(s) being towed is over 10,000 lbs. It includes tractor-trailers, truck and trailer combinations, and flatbeds.
A Class A CDL (Commercial Driver's License) in New Mexico allows you to operate any combination of vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 lbs or more, provided the Gross Vehicle Weight Rating (GVWR) of the vehicle(s) being towed is over 10,000 lbs. This includes tractor-trailers, truck and trailer combinations, tank vehicles, livestock carriers, and flatbeds.
To obtain a Class A CDL in New Mexico, you must be at least 18 years old (21 for interstate driving), possess a valid New Mexico driver's license, and pass a vision test. You'll also need to pass a written knowledge exam, obtain a commercial learner's permit (CLP), and pass a skills test, which includes a pre-trip vehicle inspection, a basic control skills test, and an on-road driving exam.
In New Mexico, you must be at least 18 years old to qualify for a Class A CDL license. However, this will only allow you to operate a commercial vehicle within the state (intrastate). If you intend to drive a commercial vehicle across state lines (interstate), or carry hazardous materials, you must be at least 21 years old.
Specific endorsements aren't required for a Class A CDL license in New Mexico, but they may be necessary depending on the type of vehicle you plan to drive or the cargo you'll transport. Endorsements include: T for double/triple trailers, P for passenger vehicles, N for tank vehicles, H for hazardous materials, and S for school buses.
The Class A CDL skills test in New Mexico encompasses three parts: a pre-trip vehicle inspection to verify your ability to assess the safety of your vehicle, a basic control skills test to evaluate your ability to control the vehicle (like backing up), and an on-road driving test where you'll demonstrate safe driving practices in various road and traffic conditions.
Yes, there are limitations. Class A CDL license holders in New Mexico are not allowed to operate a vehicle with a Gross Vehicle Weight Rating (GVWR) of more than 26,001 pounds, or tow a vehicle heavier than 10,000 pounds, unless they have the appropriate endorsements. Also, drivers under 21 are restricted to intrastate transportation only.
Yes, it's possible. In New Mexico, the Class A CDL written test is available in English and Spanish. However, federal regulations require that all CDL holders must be able to read and speak English sufficiently to converse with the general public, understand highway traffic signs and signals, respond to official inquiries, and make entries on reports and records.
Yes, accommodations can be made for the Class A CDL written test in New Mexico for individuals with disabilities. However, you must provide appropriate documentation of your disability and specific accommodation needs. It's recommended to contact the New Mexico Motor Vehicle Division beforehand to arrange these accommodations.
Yes, if you don't pass the Class A CDL written test in New Mexico, you can retake it. However, you must wait at least one day before retesting. If you fail the test three times, you must wait 6 months before trying again. It's important to thoroughly study and prepare to increase your chances of passing.
