New Mexico CDL General Knowledge study guide
New Mexico CDL General Knowledge · Work through your exam, one topic at a time.
The New Mexico CDL General Knowledge test is the written knowledge exam a commercial driver applicant takes through the New Mexico Motor Vehicle Division (MVD) as part of earning a Commercial Driver's License. It is aimed at drivers who will operate commercial motor vehicles in New Mexico and who must first demonstrate a baseline understanding of safe operation before moving on to vehicle-specific endorsements. The New Mexico CDL General Knowledge study guide has 10 sections and about 3,016 words.
01Driving Safely
The Driving Safely domain tests whether you can see hazards early, choose a safe speed and following distance, and recover from emergencies without losing control. New Mexico's general knowledge exam draws these items from the federal CDL standard, so expect CMV-specific numbers rather than car-driving rules.
331 words, about 2 min02Transporting Cargo Safely
This domain tests securement, weight distribution, and inspection. The exam wants you to know that cargo must not shift, spill, or obscure lights and plates, and that axle and gross weights must stay legal.
318 words, about 2 min03Air Brakes
The Air Brakes domain tests how the system makes and stores air, how it fails, and how to test it. New Mexico requires this knowledge for an air-brake-equipped CMV, and a failed air-brake check can end a road test.
320 words, about 2 min04Combination Vehicles
This domain tests coupling, air-line routing, off-tracking, and rollover control. Combination vehicles are less stable and need more room than a straight truck.
321 words, about 2 min05Doubles and Triples
This domain tests the extra skills for two or three trailing units. The key idea is rearward amplification: a small steering move at the tractor can become a large sideways move at the last trailer.
302 words, about 2 min06Tank Vehicles
The Tank Vehicles domain tests liquid-load behavior, stability, and safe loading. A tank endorsement is required, and the exam focuses on what makes a tanker different from a dry van.
287 words, about 1 min07Hazardous Materials
This domain tests hazard classes, shipping papers, placards, parking, and railroad-crossing rules. A hazardous materials endorsement is required, and the questions often turn on thresholds.
287 words, about 1 min08School Buses
This domain tests loading and unloading, the danger zone, railroad crossings, and post-trip checks. A school bus endorsement is required, and the exam emphasizes child safety over speed.
283 words, about 1 min09Vehicle Inspection
This domain tests the pre-trip inspection you must perform before driving. The exam expects a systematic check of the engine compartment, the walk-around, and the in-cab controls, including air brakes.
284 words, about 1 min10Basic Control of Your Vehicle
This domain tests starting, shifting, steering, stopping, and backing. The exam rewards smooth inputs, correct gear selection, and a careful check before you move.
283 words, about 1 min