Free Delaware CDL Air Brakes Practice Test 2022

Do you need a Delaware Air Brakes endorsement or an L endorsement for your commercial driving license? The CDL Air Brake 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 Delaware CDL Practice test questions are based on the Delaware 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 free CDL practice test to get ready to pass the Delaware CDL Air Brake Test now. 

Our CDL practice tests:
Based on 2022 DE commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
DE CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
1.
The most common type of foundation brakes are:
2.
Air brakes consist of ________.
3.
A dual air brake system ________.
4.
To test the vehicle's service brakes, move the vehicle:
5.
A mechanical device that drops a low air warning into a drivers view is called a:
6.
On a long or steep downgrade, the foot brakes should be used:
7.
Spring brakes will generally come on at:
8.
While applying the brakes, what tells the driver how much air pressure is being used?
9.
What negatively affects the braking power of a spring brake?
10.
When the air system is low ________.
11.
When you release the brakes and reduce the air pressure what makes up for that air loss?
12.
The level at which the air compressor stops pumping air is:
13.
After the initial pressure drop, air leakage for single vehicles should be less than:
14.
Average stopping distance under normal conditions at 55 mph is:
15.
In order to make contact with the brake drum, the brake pads and linings are pushed outward by the:
16.
Controlled braking is only possible _________.
17.
The most common type of foundation brake is?
18.
How does the antilock brake system benefit the driver?
19.
Automatic adjusters should ________.
20.
How often should alcohol containers be checked during cold weather?
21.
The governor stops the compressor from pumping air at:
22.
Manual air tank drains require:
23.
On a long or steep downgrade, how should vehicle speed be primarily controlled?
24.
Water and oil _______.
25.
What is an alternative name for a brake pedal?