Air Brakes #2

Air Brakes Endorsement Test | North Carolina 2026 #2

Train for FREE online with our North Carolina CDL air brake 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 Class A/Class B driver license in 2026, practice as much as..

Train for FREE online with our North Carolina CDL air brake 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 Class A/Class B driver 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 the requirements for CDL may vary from state to state.

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1 . To confirm that a trailer has ABS, you can:

Remove a tire and look for the ABS sensor on the axle. If you are unsure if a trailer is equipped with an Anti-Lock Braking System (ABS), look under the vehicle for the electronic control unit and wheel speed sensor wires coming from the back of the brakes.

2 . The air pressure in a dual air brake system should build from 85 to 100 psi within:

45 seconds. When inspecting a vehicle with a dual air brake system, you should wait for air pressure to build from 85 to 100 psi in both the primary and secondary systems. This should take about 45 seconds.

3 . A wig wag is:

Vehicles with air brakes are required to be equipped with a low pressure warning device. A wig wag is a type of low air pressure warning device. This device drops a mechanical arm into the driver's view if the pressure in the tanks drops to a level between 55 and 75 psi.

4 . An emergency brake must be controlled by:

All trucks, truck tractors, and buses must be equipped with emergency brakes and parking brakes. Because air pressure can eventually leak away, emergency and parking brakes should be held on by mechanical force.

5 . Brake fading is caused when:

Brakes are wet. Using the brakes excessively will cause them to overheat, making them less effective. This is referred to as "fading."

6 . Which of the following is not a part of an air brake system?

An axle brake system Air brakes consists of three separate braking systems: the service brake system, the parking brake system, and the emergency brake system.

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2026 North Carolina | Frequently Asked Questions

To secure a CDL Bus endorsement in North Carolina, you must first possess a valid Commercial Driver's License (CDL). Then, pass the Passenger Transport Test and the School Bus Endorsement Test. You'll also need to pass a background check, submit to a physical examination, and complete specialized training. Finally, you'll need to pass a driving skills test in the type of bus you wish to drive.
To obtain a CDL Bus license in North Carolina, you need to be at least 21 years old, possess a valid driver's license, and pass a physical exam. You must also complete a commercial driver's education course and pass both the written and driving skills tests. A background check is also required. Finally, pay the necessary fees to receive your license.
Yes, specific training is necessary for a CDL Bus endorsement. This includes passing the Passenger Transport Test and the School Bus Endorsement Test. In addition, you must complete specialized training that focuses on driving a bus safely. This training typically covers topics like loading and unloading passengers, managing student behavior, and emergency procedures.
CDL Bus licenses are classified under the general CDL categories of A, B, and C. Class A CDL isn't typically used for buses. Class B CDL is for single vehicles like city buses. Class C CDL is for vehicles designed to transport 16 or more passengers, including the driver, like school buses. Each requires a Passenger (P) endorsement.
No, you cannot use your personal vehicle for the CDL Bus driving test in North Carolina. The vehicle used for the test must match the class and type of vehicle you plan to drive with your CDL. For a bus endorsement, this means taking the test in a commercial bus.
During the CDL Bus driving test, several skills and maneuvers are evaluated. These include pre-trip vehicle inspection, basic vehicle control, and on-road driving. You may be asked to execute specific maneuvers such as turning, merging, backing up the bus, and navigating intersections. The examiner will also assess your ability to control the bus under various traffic conditions.
Yes, additional medical prerequisites are required for a CDL Bus endorsement. Applicants must pass a Department of Transportation (DOT) physical examination every two years. This exam includes hearing and vision tests, blood pressure checks, and assessments for other medical conditions that could affect driving ability, such as diabetes or heart conditions.
No, it is not permissible to transport passengers without a valid CDL Bus endorsement in North Carolina. This endorsement is required for drivers who wish to operate a vehicle designed to carry 16 or more passengers, including the driver. Driving without the proper endorsement can result in fines and penalties.
You can add a CDL Bus endorsement to your existing commercial driver's license. You don't need to apply for a new license, but you will have to pass the passenger vehicles knowledge test and a skills test in the type of vehicle you will be driving. You'll also need to complete any necessary medical certifications.
Yes, drivers with a CDL Bus endorsement must adhere to certain restrictions and limitations. These include following hours-of-service regulations, passing regular medical examinations, and maintaining a clean driving record. Additionally, bus drivers must not have any serious traffic violations while operating commercial vehicles and are subject to random substance abuse testing.

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