Air Brakes #1
Air Brakes Endorsement Test | Nebraska 2025 #1 Page 4 of 4
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 2025, 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 . Anti-Lock Braking Systems (ABS):
Are illegal in some states.
ABS is equipped in addition to a vehicle's normal braking system and it neither increases nor decreases the vehicle's braking capability. ABS activates during hard applications of the brake pedal in order to prevent wheels from locking up.
20 . When traveling down a steep downgrade, the best way to use your brakes is to:
Apply consistent pressure to the brake pedal all the way down the hill.
On a long or steep downgrade, brakes should only be used to supplement the braking effect of the engine. Apply the brakes just enough to feel a definite slowing down, then release them once you are about 5 mph below your target "safe" speed. Once your vehicle reaches its safe speed again, repeat this process.
21 . What color are ABS malfunction lamps?
Blue
Vehicles with Anti-Lock Braking Systems (ABS) have yellow malfunction lamps.
22 . 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.
23 . If your tractor is equipped with ABS but your trailer is not, the ABS:
Will allow others to see when you brake.
In a tractor-trailer combination, if the tractor is equipped with an Anti-Lock Braking System (ABS) but the trailer is not, the ABS will still improve the driver's steering control. The driver should keep an eye on the trailer and let up on the brakes if the trailer begins to swing out.
24 . 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.
25 . 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.
2025 Nebraska | Frequently Asked Questions
To acquire a CDL Hazmat endorsement in Nebraska, you must already hold a CDL. Then, pass the Hazardous Materials Knowledge test. You'll also need to undergo a federal TSA background check. After clearance, you can apply for the endorsement at any Nebraska DMV office. Remember, the Hazmat endorsement must be renewed every five years.
To obtain a CDL Hazmat license, you must first hold a Commercial Driver's License (CDL). You must also be at least 21 years old, have U.S. citizenship or legal status, and be able to read and speak English. Additionally, you must pass the Hazardous Materials Knowledge Test and a TSA background check.
When applying for a CDL Hazmat endorsement, you need to provide proof of U.S. citizenship or legal status (passport, birth certificate, or resident card), your current CDL, and proof of residency in Nebraska. You'll also need a completed application form and the receipt from your TSA background check. Remember to bring payment for the endorsement fee.
Yes, there is a dedicated written test for the CDL Hazmat endorsement. This test, known as the Hazardous Materials Endorsement Knowledge Test, covers topics like loading and unloading hazardous materials, bulk packaging marking, driving and parking rules, and emergency response procedures. Passing this test is a requirement for obtaining the endorsement.
The CDL Hazmat endorsement written test covers a range of topics related to the transportation of hazardous materials. This includes understanding hazard classifications, shipping paperwork, loading and unloading procedures, emergency response procedures, and safety regulations. The test also covers the correct use of placards and labels to identify hazardous materials.
Yes, there are additional charges associated with acquiring a CDL Hazmat endorsement. These include the fees for the TSA background check, which can vary but is typically around $86.50, and the endorsement application fee, which is about $13.50 in Nebraska. These costs are in addition to any expenses for training or test preparation materials.
Yes, a background check and security clearance are mandatory for the CDL Hazmat endorsement. It's known as a Threat Assessment Program (TAP), conducted by the Transportation Security Administration (TSA). It includes fingerprinting and checks for criminal history, immigration status, and mental health issues. This ensures the individual is not a security threat.
Yes, to obtain a CDL Hazmat endorsement, you are required to undergo specialized training. This training covers handling hazardous materials, emergency response procedures, and safety protocols. After the training, you'll take a written test. If you pass, you'll receive the endorsement on your Commercial Driver's License (CDL).
No, you cannot legally transport hazardous materials without a valid CDL Hazmat endorsement in Nebraska, or anywhere in the United States. The endorsement ensures that drivers have the necessary training and knowledge to safely handle and transport hazardous materials. Failing to comply can lead to serious penalties, including fines and loss of commercial driving privileges.
Yes, you can add a Hazmat endorsement to your current CDL. You don't need to apply for a new CDL. However, you will need to pass the Hazmat knowledge test, undergo a TSA background check, and pay the required fees. Once these steps are completed, the endorsement will be added to your existing CDL.