Free Maine CDL Air Brakes Practice Test 2022

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 2022 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
1.
A driver needs to be able to see a warning when the air pressure in the service air tanks falls below ______.
2.
The air loss rate for a straight truck or bus with the engine off and the brakes on should not be more than:
3.
"A slack adjuster’s free play needs to be adjusted if it is more than about ______ when you pull hard on it."
4.
Your brakes are fading when:
5.
With air brake vehicles, the parking brake should be used:
6.
To stop the vehicle, air brakes systems use:
7.
Which braking system applies and releases the parking brakes when you use the parking brake control?
8.
When parking a vehicle with a modulating control valve ________.
9.
If you must make an emergency stop, you should brake so you:
10.
"Some air brake systems have an alcohol evaporator. What may happen if you don’t keep the proper level of alcohol?"
11.
To check the free play of manual slack adjusters of S-cam brakes, you should park on:
12.
Besides heat, another cause of brake fade is:
13.
The emergency spring brake release knob is:
14.
After the initial pressure drop, air leakage for combination vehicles should be less than:
15.
The most common problem found in roadside inspections is:
16.
In dual air systems, how long should it take air pressure to build 85 to 100 psi?
17.
How are brakes designed?
18.
Stab braking should only be used:
19.
Automatic adjusters should ________.
20.
On large buses low pressure warning devices usually signal at ______.
21.
What is the purpose of a supply pressure gauge?
22.
The parking brake should be used:
23.
Vehicles with ABS have malfunction lamps that are what color?
24.
Water and oil _______.
25.
To test the parking brake you should _______.