Free Massachusetts CDL Air Brakes Practice Test 2023

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 2021 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
Air brakes consist of ________.
The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks falls below ____ psi.
Under normal conditions, in order to engage the parking brakes the driver should:
Excessive heat caused by using your brakes too often can also cause:
In a controlled braking emergency:
When should the spring brakes activate?
When checking the low pressure warning signal, it should turn on before the pressure drops below what psi?
What type of brakes pushes a wedge between the ends of two brake shoes to stop the vehicle?
If your truck or bus has dual parking control valves, you can use pressure from a separate tank to:
All of the following are factors in total stopping distance except:
If your truck has a dual air brake system, and one of the systems is low on pressure:
The emergency spring brake release knob is:
The parking brake should not be used when wet in freezing temperatures, or:
The trailer air supply knob is usually:
Under normal braking conditions, the vehicle:
In case of air pressure loss, a mechanical means of preventing the vehicle from moving is called:
The most common problem found in roadside inspections is:
All of the following apply if the low air pressure warning signal does not work except:
Controlled braking is only possible _________.
Which of the following helps the stop light switch work?
In tractors and straight trucks spring brakes will come on fully when the air pressure drops to what range?
The safety valve in the air compressor tank is set to open at _____.
On newer vehicles, the parking brake control knob is typically yellow, but on older vehicles, the parking brake might be what color?
To check the air compressor governor's "cut in" and "cut out" pressures you need to _________.
What happens when pressure is put on the air brakes?