# Free Nebraska CDL Air Brakes Practice Test 2023

Our CDL practice tests:
Based on 2021 NE commercial driver's license manual
Perfect for first-time, renewal applicants
NE CDL Air Brakes Test format:
25 questions
80% passing score
List of questions
1.
The most common type of foundation brakes are:
2.
A driver needs to be able to see a warning when the air pressure in the service air tanks falls below ______.
3.
Your truck or bus has a dual air brake system. If a low-pressure warning comes on for only one system, what should you do?
4.
What can legally hold a parking or emergency brake in position for a truck, truck tractor, or bus?
5.
Air brakes consist of ________.
6.
Excessive use of the service brakes results in overheating which can lead to:
7.
In case of a low air situation, the spring brakes should come on at:
8.
If your truck has a properly functioning dual air brake system and minimum size air tanks, the air pressure should build up from 85 to 100 psi within how many seconds?
9.
The brake system that applies and releases the brakes when the driver uses the brake pedal is the ________ brake system.
10.
The ____ shows how much pressure is in the air tanks.
11.
12.
While applying the brakes, what tells the driver how much air pressure is being used?
13.
What negatively affects the braking power of a spring brake?
14.
When increased application pressure to maintain the same speed becomes necessary, you should ______.
15.
When the safety valve releases air this indicates ___________.
16.
What type of brakes pushes a wedge between the ends of two brake shoes to stop the vehicle?
17.
In most newer vehicles, the parking brake control will be:
18.
If you must make an emergency stop, you should brake so you:
19.
The air compressor governor controls:
20.
A device that limits the amount of air provided to the front brakes is a:
21.
The most common type of foundation brake is?
22.
Brake drums should not have cracks longer than what length?
23.
In dual air systems, how long should it take air pressure to build 85 to 100 psi?
24.
Which of the following helps the stop light switch work?
25.
Vehicles without automatic air tank drains need to be checked manually to remove ________?