Free Maine CDL Air Brakes Practice Test 2023

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

Our CDL practice tests:
Based on 2021 ME commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
ME CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
An air compressor can be cooled by _______.
The reduced stopping power caused by overuse of the service brakes and excessive heat is called:
During normal driving, spring brakes are usually held back by:
The most important thing to do when a low air pressure warning comes on is:
The supply pressure gauge shows how much pressure:
If you must make an emergency stop, you should brake so you:
The type of brakes that clamp the rotor between the brake shoes is:
When you need to apply more pressure to help your brakes work normally effectively, this means that your brakes are fading. Which of the following can cause fading brakes?
Air governor cut-out should be at around:
How should you check that your service brakes are working properly?
If air pressure is not built up within the correct amount of time, then:
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:
A device that limits the amount of air provided to the front brakes is a:
In case of air pressure loss, a mechanical means of preventing the vehicle from moving is called:
In order to make contact with the brake drum, the brake pads and linings are pushed outward by the:
The brake pedal in an air brake system _______.
Some vehicles are equipped with a separate air tank used specifically to release the spring brakes in an emergency, called a:
Stop light switches are necessary because ________.
Initial air leakage rate for combination vehicles should be:
If the air compressor has its own oil supply you should do what before driving?
The safety valve in the air compressor tank is set to open at _____.
You should use the parking brake _____________.
Air tanks should be drained:
A warning to drivers behind you that the air brakes have been applied is the:
What happens when pressure is put on the air brakes?