Free Nebraska CDL Air Brakes Practice Test 2023

Do you need an Air Brakes endorsement or an L endorsement for your commercial driving license? The Nebraska CDL Air Brake test has some differences from other endorsements because your license will receive a mark of restriction if you fail the test. So having good preparation before exam day is very necessary. To ensure that our questions are relevant, all of our CDL practice test packs are based on the Nebraska CDL Manual. Each question has a detailed explanation for you to thoroughly learn the format and the topic. Don't be afraid of having a restriction on your license. Let’s try our CDL Practice Test Nebraska to get ready to pass the Nebraska CDL Air Brake Test now. 

Our CDL practice tests:
Based on 2021 NE commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
NE CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
The air loss rate for a straight truck or bus with the engine off and the brakes on should not be more than:
An air compressor can be cooled by _______.
During normal driving, spring brakes are usually held back by:
Under normal conditions, in order to engage the parking brakes the driver should:
If you must make an emergency stop, you should brake so you:
When you need to apply more pressure to help your brakes work normally effectively, this means that your brakes are fading. Which of the following can cause fading brakes?
Generally, air governor cut-in should be at:
When performing the controlled braking method for an emergency stop, you are _________.
It is not safe to drive a vehicle that has brake drums with cracks that are longer than _____ of the width of the friction area.
To check the free play of manual slack adjusters of S-cam brakes, you should park on:
What happens when your brake drums get very hot?
Total stopping distance with air brakes is Perception distance + Braking Distance + Brake Lag Distance +:
The manual adjustment of automatic slack adjusters is:
If air pressure is not built up within the correct amount of time, then:
How should you check that your service brakes are working properly?
The trailer air supply knob is usually:
In case of emergency stops, drivers should:
In case of air pressure loss, a mechanical means of preventing the vehicle from moving is called:
Compared to hydraulic brakes, air brakes add how much distance to an average 55 mph stop?
Controlled braking is only possible _________.
If air supply drops when driving, the tractor protection valve ________.
On newer vehicles, the parking brake control knob is typically yellow, but on older vehicles, the parking brake might be what color?
To check the air compressor governor's "cut in" and "cut out" pressures you need to _________.
What brake system uses part of the service and parking brake systems to stop the vehicle in the event of a brake system failure?
What happens when pressure is put on the air brakes?