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.

Number of Question 20

Passing Score 16

Number of Tests 20

1 . Using the trailer hand brake while experiencing a trailer jackknife will:

Stop the skid.

Straighten the trailer.

Increase traction.

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 usually continue to move in a straight line.

The trailer will disengage.

The trailer will likely swing around.

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 drops to a level between 20 and 45 psi.

You are experiencing a trailer jackknife.

Wheels have regained traction after a skid.

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:

Turn too quickly.

Do not driving fast enough.

Pay attention to the road.

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):

Allows wheels to lock up.

Prevents wheels from locking up.

Makes it easier to turn a large vehicle.

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 keeps air in the tractor or truck brake system, should the trailer break away or develop a bad leak.

A device that prevents theft.

A device that controls fuel levels.

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:

Supply air to the trailer.

Chock the wheels.

Inspect the fifth wheel.

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.

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2025 Massachusetts | Frequently Asked Questions

To acquire a CDL Passenger endorsement in Massachusetts, you need to pass a written knowledge test and a skills test in the type of vehicle you plan to drive. You must already hold a Commercial Driver's License (CDL). Additionally, you may need to pass a background check if you will be transporting school children.

To obtain a CDL Passenger license in Massachusetts, you must be at least 21 years old, possess a valid Massachusetts driver's license, and pass a Department of Transportation (DOT) physical examination. Additionally, you'll need to pass both knowledge and skills tests for the specific class of vehicle you'll be driving. Successful completion of a background check is also required.

Yes, specific training is usually required to secure a CDL Passenger endorsement. The training typically involves learning the specific rules and regulations related to passenger transport, as well as hands-on experience driving the type of vehicle you'll be operating. You'll also need to pass written and skills tests to demonstrate your knowledge and abilities.

Yes, additional written tests are mandatory for obtaining a CDL Passenger endorsement in Massachusetts. In addition to passing the general knowledge test, you must also pass a specific written test for the Passenger endorsement. This test covers topics such as loading and unloading passengers, safe driving practices, and emergency procedures.

During the CDL Passenger endorsement assessment, you'll need to demonstrate skills such as safe loading and unloading of passengers, proper use of emergency exits, driving safely in traffic, and handling unexpected situations. Additionally, you'll be tested on maneuvers like turning, backing up, and parking the specific class of vehicle you'll be operating.

No, it's illegal to transport passengers commercially without a valid CDL Passenger endorsement in Massachusetts. This endorsement ensures that drivers have the necessary training and skills to safely transport passengers. Violating this law can lead to significant fines, loss of your CDL, or even jail time in severe cases.

In Massachusetts, you can add the CDL Passenger endorsement to your existing CDL. You don't need a new application. However, you will need to pass a written knowledge test and a skills test in a vehicle of the same class that you plan to drive with passengers. It's important to check with the RMV for specific procedures and fees.

Yes, there are certain restrictions for drivers with a CDL Passenger endorsement in Massachusetts. For instance, these drivers must not have more than one serious traffic violation in three years. Additionally, they must not operate a vehicle carrying passengers unless all passengers have their seat belts fastened. Violating these restrictions can lead to fines or loss of endorsement.

Yes, to obtain a CDL Passenger endorsement in Massachusetts, you must be at least 21 years old. This age requirement is set by the Federal Motor Carrier Safety Administration (FMCSA) and applies nationwide. It ensures that commercial drivers have sufficient driving experience and maturity to handle the responsibilities of transporting passengers safely.

With a CDL Passenger endorsement in Massachusetts, you're eligible to operate a wide range of passenger vehicles. These include buses, shuttles, and any other commercial vehicles designed to transport 16 or more passengers, including the driver. This endorsement is often required for jobs like city bus drivers, school bus drivers, and shuttle service operators.