Air Brakes #1
Air Brakes Endorsement Test | Massachusetts 2025 #1
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 2025, 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 . 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.
2 . Before a vehicle with dual air brakes is driven, pressure of at least ____ should be built up in both braking systems.
100 psi
Before driving a vehicle with a dual air brake system, allow time for the air compressor to build up pressure of at least 100 psi in both the primary and secondary systems.
3 . Air tank drains:
Clean the air in the passenger compartment.
In an air brake system, air tanks have drains to remove accumulations of water and compressor oil. Allowing water and oil to accumulate in the system could cause damage to the brakes. Manually operated drains should be used daily.
4 . 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.
5 . When you press the brake pedal in a vehicle with S-cam brakes, air pressure pushes out the rod and moves the:
Alcohol evaporator.
When pressing the brake pedal in a vehicle with S-cam brakes, air will enter the brake chambers. The added air pressure will push out the rods and move slack adjusters, twisting the brake camshafts.
6 . 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.
See the exact questions that will be on the 2025 Massachusetts DMV exam.
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2025 Massachusetts | Frequently Asked Questions
To acquire a CDL Tank endorsement in Massachusetts, you must first have a Commercial Driver's License (CDL). Next, study the Tank Vehicles section of the Massachusetts CDL Manual. Once you're ready, schedule an endorsement test at a local RMV office. Passing this test will add the Tank endorsement to your CDL.
To obtain a CDL Tank license, the essential requirements are: possessing a valid Commercial Driver's License, passing a knowledge test on tank vehicle operations, and paying the necessary fees. The knowledge test covers topics like inspecting tank vehicles, driving tank vehicles, and safe driving rules. All information is available in the CDL manual.
Specific training or experience isn't mandatory for a CDL Tank endorsement in Massachusetts. However, you need to pass a knowledge test. Studying the Tank Vehicles section of the Massachusetts CDL Manual will help prepare for the test. Practical experience or training can certainly be beneficial, but it's not a legal requirement.
Yes, in Massachusetts, additional written tests are required to obtain a CDL Tank endorsement. These tests assess your knowledge of topics specific to operating a commercial vehicle with a tank, such as safety precautions, proper loading and unloading procedures, and understanding the characteristics of different types of tanks. Passing these tests is necessary to obtain the endorsement on your CDL.
The written test for the CDL Tank endorsement includes topics such as inspecting tank vehicles, recognizing high and low centers of gravity and how they affect vehicle stability, knowledge on baffles and their effect on vehicle handling, driving safety rules for tank vehicles, and procedures for handling emergencies. All these topics are covered in the CDL manual.
The CDL Tank endorsement assessment primarily focuses on knowledge rather than specific maneuvers. It evaluates understanding of tank vehicle operation, not physical skills. Topics include vehicle inspection, understanding of high center of gravity, safe driving techniques, emergency handling, and the effect of baffles on handling. Practical skills are tested in the general CDL driving test.
Yes, a driver with a CDL Tank endorsement must adhere to certain regulations and restrictions. For example, they must follow rules related to load limits, vehicle stability, and hazardous materials. They cannot drive a tank vehicle while under the influence of alcohol or drugs. Moreover, they must comply with all federal and state transportation regulations.
No, transporting liquid or gas materials without a valid CDL Tank endorsement is illegal in Massachusetts. This endorsement is required by law for drivers who operate commercial vehicles that transport liquids or gases. The endorsement ensures the driver understands the safety regulations and precautions needed when transporting these types of materials.
The CDL Tank endorsement can be added to your existing Commercial Driver's License. You don't need to apply for a new license. However, you will need to pass the Tank Vehicle endorsement knowledge test. Once you've passed the test, the endorsement will be added to your current CDL.
Yes, handling hazardous materials with a CDL Tank endorsement requires additional prerequisites. You must pass the Hazardous Materials (HazMat) endorsement knowledge test, and undergo a TSA background check. Additionally, you must follow specific regulations for loading, unloading, and transporting hazardous materials to ensure safety.
