Combination #1
Combination Vehicles Practice Test | Massachusetts 2025 #1
Train for FREE online with our Massachusetts CDL combination vehicle 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 combination 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 DMV requirements for issuing a combination license may vary from state to state.
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1 . Using the trailer hand brake while experiencing a trailer jackknife will:
Continue the skid.
If you are experiencing a trailer jackknife, you can help your tires regain traction by releasing the brakes. Using a trailer hand brake while experiencing a skid will only cause the skid to continue.
2 . What happens when the wheels of a trailer lock up?
The trailer will stop.
A trailer tends to swing around, potentially resulting in a trailer jackknife, if its wheels lock up.
3 . In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when:
Air pressure is above 45 psi.
In vehicles equipped with an automatic tractor protection valve, the valve will pop out if air pressure drops to a level between 20 and 45 psi. When the valve pops out, the protection valve will close, stopping the flow of air.
4 . Rollovers happen when drivers:
Drive illegally.
A rollover happens as a result of a driver taking a turn at too high a speed. Be sure to take turns and curves safely and slowly.
5 . An Anti-Lock Braking System (ABS):
Assists with the operation of brake lights.
The function of an Anti-Lock Braking System (ABS) is to prevent a vehicle's wheels from locking up during hard braking.
6 . A tractor protection valve is:
A device that allows the battery to recharge efficiently.
On combination vehicles with air brakes, the tractor protection valve keeps air in the tractor or truck brake system, should the trailer develop a bad leak or break away from the tractor.
7 . After connecting the air lines to the trailer while coupling, you should:
Connect the electrical cord.
Correctly following the steps to couple and uncouple trailers is vital to safely operating a combination vehicle. After connecting the air lines to the trailer while coupling, you should supply air to the trailer.
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.