Knowledge Test Class B #2
Class B Driving Test | New Mexico 2025 #2 Page 3 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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15 . 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.
16 . When driving in winter, which of the following should receive extra attention in a pre-trip inspection?
When doing a pre-trip inspection during the winter, you should pay extra attention to the coolant level and amount of antifreeze; the defrosting and heating equipment; the wiper blades and windshield washer; the tires and tire chains; the lights and reflectors; the windows and mirrors; the hand holds, steps, and deck plates; the radiator shuttles and winterfront; and exhaust system.
17 . 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.
18 . While operating on a downgrade, you should brake until you reach a speed that is:
While driving downhill, you should hold down the brake pedal until your vehicle reaches a speed 5 mph below your safe speed, then release the brake pedal. Repeat this process.
19 . Air tank drains:
Compressed air in an air brake system usually has a certain amount of water and oil in it. This can harm the system if allowed to accumulate. Air tanks have drain valves to aid in removing water and oil from the compressed air.
20 . On slippery roads, you should:
On a slippery road, you must adjust your driving speed to fit conditions. Because it will take longer for your vehicle to stop on a slippery road than on a dry road, you should increase your following distance when conditions are slippery. Avoid driving in a way that requires you to change speeds frequently.
21 . When pulled over to the side of the road, you should:
When stopped on the side of the road, be sure to turn on your vehicle's four-way emergency flashers, especially during times of lowered visibility. Place warning devices within 10 minutes of being stopped.
2025 New Mexico | Frequently Asked Questions
A CDL Class B license in New Mexico is issued to drivers who operate commercial vehicles exceeding 26,000 pounds or towing vehicles not exceeding 10,000 pounds. This includes buses, dump trucks, tow trucks, or delivery trucks. It does not allow the operation of Class A vehicles but allows the holder to operate Class C vehicles if properly endorsed.
A Class B CDL license in New Mexico allows the holder to operate single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or any such vehicle towing another not exceeding 10,000 pounds. This typically includes buses, dump trucks, straight trucks, and segmented buses.
To obtain a Class B CDL in New Mexico, you must be at least 18 years old (21 for interstate driving), possess a valid New Mexico driver's license, pass a vision test, and successfully complete both a knowledge test and a skills test. Additionally, you must provide proof of identity, residency, and social security number.
In New Mexico, to qualify for a Class B Commercial Driver's License (CDL), you must be at least 18 years old. However, if you plan to drive commercially across state lines (interstate commerce), federal regulations require that you be at least 21 years old.
While not necessarily required, specific endorsements can be added to a Class B CDL based on the type of vehicle you plan to drive or the cargo you plan to transport. Endorsements include passenger, school bus, tanker, hazardous materials (HazMat), and double/triple trailers. Each endorsement requires passing a specific knowledge test and sometimes a skills test.
The Class B CDL skills assessment in New Mexico includes three parts: pre-trip vehicle inspection, basic vehicle control, and on-road driving. Applicants must demonstrate their ability to inspect their vehicle, control the vehicle at low speeds, and drive safely in typical traffic situations, including turns, intersections, railway crossings, and various types of roadways.
Yes, there are limitations for Class B CDL license holders in New Mexico. They are authorized to drive single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or any such vehicle towing another not in excess of 10,000 pounds. They cannot drive a vehicle that falls under the Class A CDL category.
Yes, in New Mexico, it is possible to take the written Class B CDL test in Spanish. However, federal regulations require that all CDL drivers must be able to read and speak English sufficiently to converse with the general public, understand highway signs and signals, respond to official inquiries, and make entries on reports and records.
Yes, in New Mexico, you can request accommodations for the Class B CDL written exam if you have a disability. These accommodations are designed to provide equal access to the Motor Vehicle Division services. However, you must provide appropriate documentation of your disability and specify the type of accommodation needed when scheduling your exam.
Yes, you can retake the Class B CDL written test if you don't pass on your first attempt. New Mexico requires a waiting period of at least one day before retesting. Additionally, retesting may involve an additional fee. It's recommended to review the CDL manual and consider additional study or training before retaking the test to increase your chances of passing.