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
If you do not have automatic tank drains, how often should you drain the oil and water from the bottom of compressed air storage tanks?
"A slack adjuster’s free play needs to be adjusted if it is more than about ______ when you pull hard on it."
An application pressure gauge shows how much air you are applying to the brakes. Increased application pressure to maintain the same speed indicates that __________.
Excessive use of the service brakes results in overheating which can lead to:
In case of a low air situation, the spring brakes should come on at:
Emergency stab braking is:
If your truck has a properly functioning dual air brake system and minimum size air tanks, the air pressure should build up from 85 to 100 psi within how many seconds?
Spring brakes will generally come on at:
While applying the brakes, what tells the driver how much air pressure is being used?
With air brake vehicles, the parking brake should be used:
When the air system is low ________.
When testing air leakage rates for single vehicles, initial loss rate should be less than:
When parking a vehicle with a modulating control valve ________.
Air governor cut-out should be at around:
When your brake's main air pressure is lost ________.
A device that limits the amount of air provided to the front brakes is a:
Repeatedly partially increasing and pressing the brake pedal may result in:
The air compressor is connected to the engine through ______.
The braking power of the spring brakes ______.
How does the antilock brake system benefit the driver?
What is proper braking technique for drivers travelling down a hill or any other downgrade?
Air tanks should be drained:
Vehicles with ABS have malfunction lamps that are what color?
In a dual air brake system, one system will typically control the rear brakes, and the other:
What is the purpose of an air storage tank?