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
Your truck or bus has a dual air brake system. If a low-pressure warning comes on for only one system, what should you do?
During normal driving, spring brakes are usually held back by:
Modern air brakes combine three different systems. They are the service, the parking, and the _____ brakes.
At 55 mph on dry pavement, the air brake lag distance is how many feet?
Your truck has a dual air system and one of the systems loses its pressure. What will happen?
The ____ shows how much pressure is in the air tanks.
To make sure that the spring brakes come on automatically, do all of the following except:
Which braking system applies and releases the parking brakes when you use the parking brake control?
When stab braking if you re-apply the brakes before the wheels start rolling, __________.
If the low air warning comes on while you are driving, you should:
The parking brake knob is usually:
What is a \"Wig Wag\"
Besides heat, another cause of brake fade is:
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:
In case of emergency stops, drivers should:
The use of brakes on a long and steep downgrade under normal conditions is only a supplement to:
The brake pedal in an air brake system _______.
Why should you drain water from compressed air tanks?
Brake drums or discs _______.
What is the purpose of a supply pressure gauge?
To avoid damaging the brakes, what should you never do while the spring brakes are applied?
What brake system uses part of the service and parking brake systems to stop the vehicle in the event of a brake system failure?
On a long or steep downgrade, how should vehicle speed be primarily controlled?
Required on all vehicles with air brakes, what tells the driver that air pressure is too low?
Vehicles with air brakes have pressure gauges connected to the _______.