Combination #1
Combination Vehicles Practice Test | New Mexico 2026 #1
Train for FREE online with our New Mexico CDL combination vehicle 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 combination license in 2026, 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 DMV requirements for issuing a combination license may vary from state to state.
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1 . What is a bobtail tractor?
Tractors without semi-trailers are referred to as "bobtail tractors." Bobtail tractors are difficult to operate and drivers must exercise caution.
2 . If the emergency air line loses pressure:
The emergency air line controls the emergency brakes on a combination vehicle. A loss of air pressure in the emergency line will cause the emergency trailer brakes to activate.
3 . What does an Anti-Lock Braking System (ABS) do?
An Anti-Lock Braking System (ABS) helps prevent wheel lockup during hard braking. If ABS detects impending lockup, it reduces braking pressure to a safe level.
4 . When driving while pulling trailers, you should:
You should always steer gently and smoothly while pulling a trailer. Making sudden steering moves could cause the trailer to tip over.
5 . When braking while pulling a trailer equipped with anti-lock brakes, you should:
When driving a tractor-trailer combination that is equipped with an Anti-Lock Braking System (ABS), you should brake in the same manner that you would if the vehicle was not equipped with ABS.
6 . The trailer hand valve should be used:
The trailer hand valve (also referred to as the "trolley valve" or "Johnson bar") works the trailer brakes and should be used only when testing them. Using the trailer hand valve while driving could result in a skid.
7 . Combination vehicles:
Driving combination vehicles requires more skill than driving single commercial vehicles. Combinations are generally longer, generally heavier, and are more vulnerable to rollover.
See the exact questions that will be on the 2026 New Mexico DMV exam.
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2026 New Mexico | Frequently Asked Questions
To secure a CDL Doubles/Triples endorsement in New Mexico, you must first possess a valid New Mexico commercial driver's license (CDL). Then, you'll need to pass a written knowledge test specific to operating double/triple trailers. The test covers topics like coupling and uncoupling, inspecting doubles and triples, and handling. Once you pass the test, the endorsement is added to your CDL.
To obtain a CDL Doubles/Triples license, you must already have a Commercial Driver's License (CDL). You'll need to study for and pass a written knowledge test that covers specific aspects of driving double/triple trailers, such as inspecting the vehicles, coupling and uncoupling, and handling. After successfully passing the test, the endorsement will be added to your CDL.
While there's no specific requirement for specialized experience or training to get a CDL Doubles/Triples endorsement in New Mexico, it's highly recommended. This endorsement requires passing a written test about operating double/triple trailers, so studying the CDL manual or taking a training course can be beneficial to understand the nuances of handling these larger vehicles.
Yes, to get a CDL Doubles/Triples endorsement in New Mexico, you must pass a specific written knowledge test. This test covers topics such as how to couple and uncouple correctly, inspect doubles and triples, and the proper procedures for towing double/triple trailers. There's no additional driving test required beyond the standard CDL skills test.
The CDL Doubles/Triples endorsement test is a written examination, so there are no specific skills or maneuvers to showcase. The test assesses your knowledge on safety regulations, coupling and uncoupling, inspecting doubles and triples, and pulling double/triple trailers. It's important to study these areas thoroughly in preparation for the test.
No, it's not permissible to operate double or triple trailers without a valid CDL Doubles/Triples endorsement in New Mexico. Operating such vehicles without the necessary endorsement can result in severe penalties including fines, suspension of your CDL, or even jail time. Always ensure you have the proper endorsements for the type of vehicle you're operating.
You can append the CDL Doubles/Triples endorsement to your current commercial driver's license. You don't need to initiate a new application for a license. However, you will need to pass the specific written knowledge test for doubles/triples endorsement and pay any associated fees.
Yes, there are limitations for drivers holding a CDL Doubles/Triples endorsement. For instance, they must obey weight restrictions for double and triple trailers. Additionally, some states or cities may have restrictions on where and when double or triple trailers can be driven due to safety concerns. Always check local regulations before driving.
In New Mexico, a double trailer can't exceed 81.5 feet in length and 129,000 pounds in weight. For triple trailers, the maximum length is 105 feet and the weight can't exceed 110,000 pounds. These limits include the tractor and all trailers. However, specific routes may have additional restrictions or allowances. Always check local regulations before operating these vehicles.
Yes, drivers with a CDL Doubles/Triples endorsement must follow specific safety regulations. These include conducting pre-trip inspections, understanding how to couple and uncouple correctly, and knowing the special considerations for driving. These involve avoiding sudden movements, maintaining a safe following distance, and understanding the high rollover risk associated with these vehicles.
