Air Brakes #2
Air Brakes Endorsement Test | Massachusetts 2026 #2
Train for FREE online with our Massachusetts CDL air brake test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a MA Class A/Class B driver license in 2026, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that the requirements for CDL may vary from state to state.
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1 . A tank endorsement is:
Optional when transporting hazardous materials.
In general, a tank endorsement is required to a drive tank vehicle used to transport liquids or gases. This applies to both hazardous and non-hazardous materials.
2 . What does the air compressor governor do?
Controls the temperature of the air leaving the air storage tanks.
In an air brake system, the air compressor governor controls when the air compressor pumps air into the air storage tanks.
3 . Braking mechanisms are located ____ a brake drum.
On top of
Drum brakes are attached to the wheels and located on the axles of a vehicle. The braking mechanisms that cause the vehicle to stop can be found inside of a drum brake.
4 . During a static leakage test, the maximum leakage rate for a single vehicle with air brakes is ____ in one minute.
4 psi
When performing a static leakage test on a single vehicle with air brakes, the leakage rate should be no more than 2 psi in a minute. If air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.
5 . A low air pressure warning signal should activate:
When tank pressure falls below 5 psi.
In an air brake system, a low air pressure warning signal must come on if air pressure in the tanks falls below 60 psi. This warning signal may come in the form of a light, a buzzer, or a wig wag.
6 . The air pressure in a dual air brake system should build from 85 to 100 psi within:
45 seconds.
When inspecting a vehicle with a dual air brake system, you should wait for air pressure to build from 85 to 100 psi in both the primary and secondary systems. This should take about 45 seconds.
2026 Massachusetts | Frequently Asked Questions
To secure a CDL Bus endorsement in Massachusetts, you must first have a valid Commercial Driver's License (CDL). Then, you need to pass the Passenger Vehicles (P) and School Bus (S) endorsement knowledge tests. After passing the tests, you must also pass a skills test in a vehicle representative of the class and type you will be driving.
To obtain a CDL Bus License in Massachusetts, you must have a valid driver's license and pass the CDL general knowledge test. You also need to pass the Passenger Transport test and the School Bus endorsement test if applicable. Finally, you must successfully complete a skills test in an appropriate vehicle. You must be at least 18 years old and meet medical requirements.
Yes, specific training is necessary for a CDL Bus endorsement in Massachusetts. You must complete a state-approved driver education program that includes classroom instruction and behind-the-wheel training. The program will cover topics such as vehicle inspection, basic controls, and safe driving techniques. After the training, you must pass both knowledge and skills tests to obtain the endorsement.
In Massachusetts, CDL Bus licenses fall into three classes: Class A, B, and C. Class A licenses are for vehicles with a combined weight rating of 26,001 pounds or more. Class B licenses are for vehicles weighing 26,001 pounds or more, or a vehicle transporting 16 or more passengers. Class C licenses are for vehicles designed to transport 16 to 23 passengers, including the driver.
No, you cannot use your personal vehicle for the CDL Bus driving test in Massachusetts. The vehicle you use for the test must be of the same type and class that your CDL will cover. Therefore, you must take the test in a commercial bus. Many training schools provide vehicles for testing purposes.
The CDL Bus driving test in Massachusetts evaluates several skills. These include pre-trip vehicle inspection to ensure your bus is safe to drive, basic control skills like backing, parking, and turning, and on-road driving to assess your ability to handle a bus in different traffic situations. It also checks your ability to load and unload passengers, react to emergencies, and operate special features of the bus.
Yes, for a CDL Bus endorsement in Massachusetts, you must pass a Department of Transportation (DOT) physical examination. This examination ensures that you're physically capable of safely operating a commercial vehicle. It includes vision and hearing tests, blood pressure check, and an assessment of your overall physical condition. Any severe health issues that could interfere with driving safety may disqualify you.
No, it is not permissible to transport passengers without a valid CDL Bus endorsement in Massachusetts. Operating a commercial vehicle designed to carry 16 or more passengers, including the driver, requires a CDL with a Passenger (P) endorsement. Driving without the appropriate license or endorsement can result in hefty fines, penalties, and potentially the suspension of your driving privileges.
In Massachusetts, you can add the CDL Bus endorsement to your existing license. You don't need to apply for a new license. However, you must pass the Passenger Vehicles knowledge test and the skills test in a passenger vehicle of the same class that the applicant operates or expects to operate.
Yes, there are restrictions for drivers with a CDL Bus endorsement in Massachusetts. Drivers must not have any serious traffic violations within the past two years. They must pass a physical exam every two years, and they are subject to random drug and alcohol testing. Additionally, drivers must comply with hours-of-service regulations to prevent fatigue-related accidents.