Free Massachusetts CDL Air Brakes Practice Test 2022

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

Our CDL practice tests:
Based on 2022 MA commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
MA CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
1.
When inspecting air brakes:
2.
A dual air brake system ________.
3.
Your brakes are fading when:
4.
The brake system that applies and releases the brakes when the driver uses the brake pedal is the ________ brake system.
5.
In ideal conditions a truck or bus with air brakes going at 55 mph would require the stopping distance of how many feet?
6.
When the mechanical arm of a wig wag drops into your view that means the pressure in your system has dropped below what psi?
7.
What is the purpose of an antilock braking system (ABS)?
8.
"Some air brake systems have an alcohol evaporator. What may happen if you don’t keep the proper level of alcohol?"
9.
To check the free play of manual slack adjusters of S-cam brakes, you should park on:
10.
Why is manually adjusting automatic slack adjusters dangerous?
11.
In order to make contact with the brake drum, the brake pads and linings are pushed outward by the:
12.
Compared to hydraulic brakes, air brakes add how much distance to an average 55 mph stop?
13.
With air brake vehicles, the parking brakes should be used:
14.
Brake drums (or discs) must not have cracks longer than ____ the width of the friction area.
15.
The service brake system ________.
16.
The air tanks must be drained because:
17.
Initial air leakage rate for combination vehicles should be:
18.
Why do air brakes take longer to stop than hydraulic brakes?
19.
If the air compressor has its own oil supply you should do what before driving?
20.
How often should alcohol containers be checked during cold weather?
21.
During a normal drive, the spring brakes are held back by _____.
22.
On large buses low pressure warning devices usually signal at ______.
23.
The governor stops the compressor from pumping air at:
24.
What is a wig wag ?
25.
To test the parking brake you should _______.