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
The most common type of foundation brakes are:
A driver needs to be able to see a warning when the air pressure in the service air tanks falls below ______.
The air loss rate for a straight truck or bus with the engine off and the brakes on should not be more than:
The safety valve discharges automatically at the pressure of:
In case of emergency when driving a vehicle equipped with dual parking control valves, you should:
The proper use of the brakes when going down a long steep grade after selecting a proper gear is to brake until your speed is about ____ below the posted speed and release your brake.
To test the vehicle's service brakes, move the vehicle:
Total stopping distance for air brakes is longer than that for hydraulic brakes due to ______ distance.
When the engine is off and the parking brake released, a single vehicle air loss rate should be less than ________ psi in one minute.
When you need to apply more pressure to help your brakes work normally effectively, this means that your brakes are fading. Which of the following can cause fading brakes?
The type of brakes that clamp the rotor between the brake shoes is:
If you must make an emergency stop, you should brake so you:
Air braking takes more time than hydraulic braking because:
The air compressor governor controls:
Which of these is NOT a proper time to apply the parking brakes?
Pressing and releasing the brake pedal unnecessarily:
When inspecting the air brake system, what particular item in the engine compartment should the driver pay specific attention to?
Automatic air tanks _______.
If one air system is very low on pressure _______.
Why should you check the brake adjustment often?
When driving an older vehicle that has a manual front brake limiting valve, drivers should:
Vehicles with air brakes _________.
What is used to put alcohol into the system and reduce ice risk?
Manual air tank drains require:
What is the function of a safety valve?