Air Brakes #2
Air Brakes Endorsement Test | Nebraska 2026 #2
Train for FREE online with our Nebraska 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 NE 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 . What is brake lag?
Because air takes time to flow through the air lines to the brakes, air brakes cannot begin working instantly. There is often a brake lag of at least one-half of a second between the moment the brake pedal is pressed and the moment the brakes begin to work.
2 . Most heavy-duty vehicles use ____ air brake systems.
Quad
The majority of heavy-duty vehicles are equipped with dual air brake systems.
3 . To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve should:
Keep the control at the halfway mark.
Some pre-1975 vehicles have a front brake limiting valve, which has "normal" and "slippery" settings. The idea behind these valves was to limit the air pressure available to the front brakes when driving on slippery surfaces, and thereby reduce the danger of a front-wheel skid. Studies have found that this is not actually a concern, so if your vehicle has a front brake limiting valve, leave it in the "normal" position.
4 . To stop in a vehicle that uses air brakes, the driver should:
Pull the brake pedal up.
To make a normal stop in a vehicle with air brakes, push the brake pedal down. The harder the pedal is pressed, the more air pressure is released.
5 . What must be on an air tank in an air-braked vehicle?
An oxidizer
All air tanks on air-braked vehicles must have one-way check valves located between the air compressor and the first reservoir. This prevents air from flowing out in the event of a leak.
6 . A low air pressure warning signal should activate:
In an air brake system, a low air pressure warning signal must come on if air pressure in the tanks falls below 55 psi. This warning signal may come in the form of a light, a buzzer, or a wig wag.
2026 Nebraska | Frequently Asked Questions
To secure a CDL Bus endorsement in Nebraska, you must first possess a valid Commercial Driver's License (CDL). Then, pass the Passenger Transport Test, which covers the special driving skills and knowledge needed for safe passenger transport. Finally, pass a pre-trip inspection test and a skills test in a vehicle of the same type you will be driving.
To obtain a CDL Bus license in Nebraska, you must have a valid Nebraska driver's license. You'll need to pass the CDL general knowledge test, the passenger transport test, and a driving skills test in a bus-like vehicle. Also required are a medical examination and a background check. You must be at least 21 years old for interstate driving.
While Nebraska doesn't mandate specific training for a CDL Bus endorsement, it's beneficial to undergo professional training. It prepares you for the written and skills tests. You must have a valid Nebraska CDL, pass the passenger transport test, and demonstrate driving skills in a similar vehicle. A medical examination and background check are also required.
CDL Bus licenses are classified into three main categories: Class A, Class B, and Class C. Class A is for vehicles with a combined weight of 26,001 pounds or more. Class B is for vehicles designed to transport 16 or more passengers, including the driver. Class C is for smaller vehicles that do not fit into the first two classes but transport 16 or more passengers.
No, you cannot use your personal vehicle for the CDL Bus driving test. The vehicle used must match the class and type of vehicle you will be driving with your CDL. For instance, if you're testing for a passenger bus endorsement, you must use a passenger bus for your test.
The CDL Bus driving test in Nebraska assesses various skills including pre-trip vehicle inspection, basic vehicle control, and on-road driving. You'll be tested on maneuvers like turning, merging, and backing up. The examiner also checks your ability to obey traffic laws, use mirrors, handle intersections, respond to changing traffic conditions, and manage passenger safety.
Yes, additional medical and physical prerequisites are necessary for a CDL Bus endorsement. Drivers must pass a Department of Transportation (DOT) physical examination every two years. This exam evaluates vision, hearing, blood pressure, and medical conditions that could affect driving ability, such as epilepsy or heart disease.
No, it is not permissible to transport passengers without a valid CDL Bus endorsement in Nebraska. The law requires anyone driving a vehicle designed to carry 16 or more passengers (including the driver) to hold a valid CDL with a Passenger (P) endorsement. Driving without the appropriate license or endorsement can result in legal penalties.
Yes, a CDL Bus endorsement can be added to your existing commercial driver's license in Nebraska. It requires passing the Passenger Endorsement Knowledge Test and a skills test in the type of vehicle you'll be driving. You don't need to apply for a new CDL, but there might be additional fees for the endorsement.
Yes, there are several restrictions for drivers with a CDL Bus endorsement in Nebraska. Drivers must not have any serious traffic violations within the last two years. Additionally, they must pass a Department of Transportation physical examination every two years, and maintain a clean driving record. Any failure to comply with these restrictions can lead to the loss of their endorsement.