# Free Connecticut CDL Air Brakes Practice Test 2023

Do you need an 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 Connecticut CDL Practice test questions are based on the CT 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 Connecticut CDL Air Brake Test now.

Our CDL practice tests:
Based on 2021 CT commercial driver's license manual
Perfect for first-time, renewal applicants
CT CDL Air Brakes Test format:
25 questions
80% passing score
List of questions
1.
In case of emergency when driving a vehicle equipped with dual parking control valves, you should:
2.
A low pressure warning signal could be __________.
3.
Excessive use of the service brakes results in overheating which can lead to:
4.
The proper use of the brakes when going down a long steep grade after selecting a proper gear is to brake until your speed is about ____ below the posted speed and release your brake.
5.
6.
With air brake vehicles, the parking brake should be used:
7.
To stop the vehicle, air brakes systems use _______.
8.
When the safety valve releases air this indicates ___________.
9.
When performing the controlled braking method for an emergency stop, you are _________.
10.
What is a \"Wig Wag\"
11.
If the low air pressure warning light comes on, you should:
12.
If air pressure is not built up within the correct amount of time, then:
13.
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:
14.
In order to make contact with the brake drum, the brake pads and linings are pushed outward by the _____.
15.
With air brake vehicles, the parking brakes should be used:
16.
You should avoid using the parking brake when _______.
17.
18.
On newer vehicles, the parking brake control knob is typically yellow, but on older vehicles, the parking brake might be what color?
19.
The safety valve in the air compressor tank is set to open at _____.
20.
Air tanks should be drained:
21.
To avoid damaging the brakes, what should you never do while the spring brakes are applied?
22.
In a dual air brake system, one system will typically control the rear brakes, and the other:
23.
To prevent too much pressure from building up in the system, what is installed?
24.
What happens when pressure is put on the air brakes?
25.
If your brakes are wet, what should you do to dry them quicker?