# Free Pennsylvania CDL Air Brakes Practice Test 2023

Do you need a Pennsylvania Air Brakes endorsement or an L endorsement for your commercial driving license? The Pennsylvania 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 PA 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 Pennsylvania CDL Practice Test to get ready to pass the Pennsylvania CDL Air Brake Test now.

Our CDL practice tests:
Based on 2021 PA commercial driver's license manual
Perfect for first-time, renewal applicants
PA CDL Air Brakes Test format:
25 questions
80% passing score
List of questions
1.
The parking or emergency brake on a heavy vehicle can only be held in position by something that cannot leak away, like:
2.
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?
3.
Total stopping distance for air brakes is longer than that for hydraulic brakes due to ______ distance.
4.
Excessive heat caused by using your brakes too often can also cause:
5.
When the air system is low ________.
6.
When checking the low pressure warning signal, it should turn on before the pressure drops below what psi?
7.
What is a \"Wig Wag\"
8.
If your truck has a dual air brake system, and one of the systems is low on pressure:
9.
When checking the air pressure buildup, pressure should build:
10.
11.
The S-cam:
12.
To stop the vehicle, the brake shoes and linings are pushed against:
13.
Compared to hydraulic brakes, air brakes add how much distance to an average 55 mph stop?
14.
In order to make contact with the brake drum, the brake pads and linings are pushed outward by the:
15.
If you need to make an emergency stop, you should brake so that you can ________.
16.
How should the air leakage rate be tested?
17.
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:
18.
Which of the following helps the stop light switch work?
19.
Stab braking should only be used:
20.
The safety valve in the air compressor tank is set to open at _____.
21.
On newer vehicles, the parking brake control knob is typically yellow, but on older vehicles, the parking brake might be what color?
22.
To check the air compressor governor's "cut in" and "cut out" pressures you need to _________.
23.
Air tanks should be drained:
24.
In a dual air brake system, one system will typically control the rear brakes, and the other:
25.
Water and oil _______.