Air Brakes #2
Air Brakes Endorsement Test | North Carolina 2026 #2 Page 4 of 4
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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19 . What kind of brakes do most newer heavy-duty trucks use?
Most newer heavy-duty vehicles use dual air brake systems. A dual air brake system has two separate air brake systems which use a single set of brake controls.
20 . 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.
21 . What is often found in compressed air?
Compressed air in an air brake system usually contains a certain amount of water and compressor oil. The water and oil can damage the brakes if left to accumulate in the system. Tanks must be drained regularly to remove this build-up.
22 . If the low pressure warning light comes on while you are driving:
You should continue driving, but turn the emergency flashers on to warn other motorists.
If the low air pressure warning light turns on, you should stop and safely park your vehicle as soon as possible. Controlled braking will be possible only as long as enough air remains in the tanks.
23 . During an applied leakage test, the maximum leakage rate for a single vehicle with air brakes is:
4 psi in one minute.
It is important to know the maximum air loss rate that is safe for your specific vehicle. A single vehicle with air brakes should have a leakage rate no higher than 3 psi in a minute during an applied leakage test.
24 . If the low air pressure warning signal comes on in a vehicle with air brakes, the driver should:
If the low air pressure warning signal comes on while you are operating a vehicle with air brakes, you should stop and safely park the vehicle as soon as possible. It is essential that you are able to stop safely while you still have some braking power remaining.
25 . What do the two systems of a dual air brake system share?
Both systems in a dual air brake systems share a single air compressor. If the air compressor is damaged, neither system will be able to operate properly.
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 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.
