# Free New York CDL Air Brakes Practice Test 2023

Do you need an Air Brakes endorsement or an L endorsement for your commercial driving license? The New York 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 NYC 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 NY CDL Practice Test to get ready to pass the New York CDL Air Brake Test now.

Our CDL practice tests:
Based on 2021 NY commercial driver's license manual
Perfect for first-time, renewal applicants
NY CDL Air Brakes Test format:
25 questions
80% passing score
List of questions
1.
An air compressor can be cooled by _______.
2.
The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks fall below ____ psi.
3.
Your truck or bus has a dual air brake system. If a low air pressure warning comes on for only one system, what should you do?
4.
The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks falls below ____ psi.
5.
The 3 individual systems of the air brakes are the service brakes, emergency brake, and:
6.
The ____ shows how much pressure is in the air tanks.
7.
The brake system that applies and releases the brakes when the driver uses the brake pedal is the ________ brake system.
8.
In ideal conditions a truck or bus with air brakes going at 55 mph would require the stopping distance of how many feet?
9.
What negatively affects the braking power of a spring brake?
10.
The type of brakes that clamp the rotor between the brake shoes is:
11.
When should the spring brakes activate?
12.
13.
What is a \"Wig Wag\"
14.
Which of these is NOT a proper time to apply the parking brakes?
15.
16.
17.
After the initial pressure drop, air leakage for combination vehicles should be less than:
18.
Controlled braking is only possible _________.
19.
At minimum, a dual air system should build up to what psi in the primary and secondary systems?
20.
In a dual air brake system, if the air pressure in one part of the system drops enough to set off the low air warning:
21.
Stab braking should only be used:
22.
If air supply drops when driving, the tractor protection valve ________.
23.
Stop light switches are necessary because ________.
24.
Why should air tanks be drained completely?
25.
Vehicles without automatic air tank drains need to be checked manually to remove ________?