Free Nebraska CDL Air Brakes Practice Test 2022

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 2022 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
1.
The safety valve discharges automatically at the pressure of:
2.
The reduced stopping power caused by overuse of the service brakes and excessive heat is called:
3.
The air brake lag distance at 55 mph on dry pavement adds about ____ feet.
4.
All air brake equipped vehicles have:
5.
How far should manual slack adjusters move before they need to be adjusted?
6.
Air tanks need to be drained ______.
7.
An air brake system is fully charged at what psi?
8.
The application pressure gauge shows how much air pressure you:
9.
When parking a vehicle with a modulating control valve ________.
10.
When using a vehicle with air brakes, the parking needs to be used _______.
11.
Some vehicles are equipped with a control allowing you to apply the spring brakes gradually, called a:
12.
Spring brakes will come on automatically, but the parking brake can also be applied:
13.
If the low air pressure warning light comes on, you should:
14.
In a dual air brake system, the first system, supplying the rear brakes, is commonly known as the "primary" system, and the other as the:
15.
Under normal braking conditions, the vehicle:
16.
Brake drums (or discs) must not have cracks longer than ____ the width of the friction area.
17.
With air brake vehicles, the parking brakes should be used:
18.
If you need to make an emergency stop, you should brake so that you can ________.
19.
Why does a heavily loaded vehicle need a longer distance to stop?
20.
Brake linings should not be _______.
21.
Why do air brakes take longer to stop than hydraulic brakes?
22.
The safety valve in the air compressor tank is set to open at _____.
23.
What does the air compressor governor control?
24.
What is proper braking technique for drivers travelling down a hill or any other downgrade?
25.
Water and oil _______.