Knowledge Test Class B #1
Class B Driving Test | North Carolina 2026 #1 Page 2 of 7
Train for FREE online with our North Carolina 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 NC CDL class B permit 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 CDL class B requirements may vary from state to state.
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8 . A one-way check valve:
Holds the spring brakes in position until they are used.
A one-way check valve is required to be between an air compressor and the first main reservoir. This valve prevents air from escaping the system if the air compressor develops a leak.
9 . As part of the vehicle inspection test, you will be asked to:
Clean windows.
During the vehicle inspection test, you must touch or point to each item that you are checking and explain to the examiner what you are inspecting and why.
10 . When driving a vehicle equipped with an Anti-Lock Braking System (ABS), you should:
Brake with less force than you would in a vehicle not equipped with ABS.
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.
11 . If you are being tailgated, you should:
Allow the vehicle to pass.
If someone is tailgating you, it is a good idea to open up the space ahead of your vehicle to make it easier for the driver to pass you. Increasing your speed is not a good idea because the driver may continue to tailgate you at the higher speed, only increasing the danger.
12 . Placards should be used:
If the hazardous materials create an inhalation hazard.
Placards must be placed on the outside of vehicles carrying hazardous materials. They identify the specific class or classes of materials being carried and warn others of relevant hazards.
13 . Pressing and releasing a brake pedal unnecessarily can:
Create a loud noise.
In an air brake system, pressing and releasing the brake pedal unnecessarily can release air from the braking system faster than the compressor can replace it.
14 . How many daily hours of sleep does an adult need to maintain alertness?
Four to five
Being properly rested is essential to the safe operation of a CMV. To maintain alertness, most people need eight to nine hours of sleep per night.
See the exact questions that will be on the 2026 North Carolina DMV exam.
99.2% of people who use the cheat sheet pass the FIRST TIME
Lillian MCcranie explains how our CDL study guide was helpful in passing the exam and recommends it to everyone.
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2026 North Carolina | Frequently Asked Questions
To secure a Doubles/Triples endorsement in North Carolina, you must first have a Commercial Driver's License (CDL). Next, you'll need to pass the Doubles and Triples Endorsement Test, which covers coupling and uncoupling, inspecting doubles and triples, and handling. The written test can be taken at your local DMV. Study materials are available online or at the DMV.
To obtain a CDL Doubles/Triples license, you must first have a Commercial Driver's License (CDL). Then, study for and pass the Doubles/Triples Endorsement Test, which covers topics such as coupling and uncoupling, inspecting doubles and triples, and handling. You can take the test at your local DMV. The DMV provides study materials.
While North Carolina does not explicitly require specialized experience or training for a CDL Doubles/Triples endorsement, it is highly recommended. The endorsement test covers specific knowledge areas, such as coupling and uncoupling, inspecting doubles and triples, and handling. Many applicants find that training programs or courses help them prepare for the test and handle these types of vehicles safely.
Yes, to acquire a CDL Doubles/Triples endorsement in North Carolina, you must pass a specific Doubles/Triples Endorsement written examination. This test covers topics like coupling and uncoupling, inspecting doubles and triples, and the proper procedures to handle these types of vehicles. It's an additional test to the standard CDL written exam.
In North Carolina, the CDL Doubles/Triples endorsement does not require a specific skills or maneuvers test. However, the written test covers areas like coupling and uncoupling, inspecting doubles and triples, and handling. It's important to understand these concepts thoroughly. Still, you won't need to physically demonstrate these skills for the endorsement.
No, it's not permissible. In North Carolina, like in all states, a CDL Doubles/Triples endorsement is required to legally operate double or triple trailers. Driving these types of vehicles without the proper endorsement can lead to severe penalties, including fines and potential suspension of your commercial driver's license.
You can add the Doubles/Triples endorsement to your existing Commercial Driver's License (CDL) in North Carolina. You don't need to start a new application for a CDL. However, you must pass the Doubles/Triples endorsement written test and pay the required fee to add this endorsement to your current CDL.
Yes, there are certain limitations for drivers with a CDL Doubles/Triples endorsement in North Carolina. Drivers must comply with the state's weight and length restrictions for double and triple trailers. Also, they can only operate vehicles that their specific CDL class allows. Additionally, all federal regulations regarding hours of service and medical fitness apply.
In North Carolina, a double trailer cannot exceed 28.5 feet in length for each trailer and the maximum gross vehicle weight is 80,000 pounds. However, the weight can vary based on the number of axles and axle spacing. For triples, it's usually limited to hauling within 100 air miles of the driver's work reporting location and they cannot exceed 105 feet in total length.
Yes, safety regulations for driving double/triple trailers in North Carolina include conducting pre and post-trip vehicle inspections, maintaining safe following distances, understanding high wind conditions, and proper coupling/uncoupling procedures. Additionally, drivers must comply with all federal regulations such as hours of service and vehicle maintenance. It's crucial to have a valid CDL Doubles/Triples endorsement to operate these vehicles.
