Free Alaska CDL Air Brakes Practice Test 2023

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

Our CDL practice tests:
Based on 2021 AK commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
AK CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
The stop light switch:
Modern air brakes combine three different systems. They are the service, the parking, and the _____ brakes.
A dual air brake system ________.
At 55 mph on dry pavement, the air brake lag distance is how many feet?
On a long or steep downgrade, the foot brakes should be used:
If you must make an emergency stop, you should brake so you:
In ideal conditions a truck or bus with air brakes going at 55 mph would require the stopping distance of how many feet?
The low air pressure warning signal indicates:
Where is the modulating control valve located on some vehicles?
To stop the vehicle, air brakes systems use:
When the engine is off and the parking brake released, a single vehicle air loss rate should be less than ________ psi in one minute.
What type of brakes pushes a wedge between the ends of two brake shoes to stop the vehicle?
When does the air compressor governor allow air to start pumping?
If the low air warning comes on while you are driving, you should:
"Some air brake systems have an alcohol evaporator. What may happen if you don’t keep the proper level of alcohol?"
If the spring brakes are on, when should you push the brake pedal?
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:
The S-cam:
Pressing and releasing the brake pedal unnecessarily:
In dual air systems, how long should it take air pressure to build 85 to 100 psi?
Stop light switches are necessary because ________.
If air supply drops when driving, the tractor protection valve ________.
What is proper braking technique for drivers travelling down a hill or any other downgrade?
To avoid damaging the brakes, what should you never do while the spring brakes are applied?
Typically, at what psi does the air compressor governor stop the compressor from pumping air?