Combination Vehicles Practice Test | Alaska 2025 #1

Train for FREE online with our Alaska 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 AK 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 . When a vehicle goes around a corner, the rear wheels:

Follow the same path as the front wheels.

Follow a different path than the front wheels.

Should not be a concern to the driver.

When any vehicle goes around a corner, the rear wheels follow a different path than the front wheels. This is called off-tracking. The degree of off-tracking will be greater on long vehicles than on short vehicles.

2 . If your vehicle gets stuck on railroad tracks, you should:

Sit in the cab and call for help.

Exit the cab and walk away from the tracks.

Motion for another driver to push your vehicle.

If your vehicle gets stuck on railroad tracks for any reason, you should immediately exit the vehicle and walk away from the tracks. Contact the proper emergency authorities.

3 . Older trailers are not equipped with spring brakes. This means that if the air supply for a vehicle's air braking system leaks away:

The trailer will stop normally.

The trailer will not have brakes.

The trailer will speed up.

Older trailers do not have spring brakes. This means that if the air supply in an older trailer's air tank has leaked away, there will be no working brakes connected to the trailer and its wheels will turn freely.

4 . If an air supply control is in its "emergency" position:

The vehicle will increase speed.

The trailer emergency brakes will be applied.

The air supply to the trailer will increase.

Tractor protection controls in older vehicles may be operated by levers instead of knobs. If an air supply control is set in its "emergency" position, the air supply will be stopped and the trailer emergency brakes will be applied.

5 . Before beginning a trip, you should:

Leave the service line valve open.

Remove the relay valves.

Close the emergency line valve.

Before a trip, you should ensure that air reaches all air brakes on all trailers by opening up the rear emergency line and service line shut-off valves and listening for escaping air. Close both shut-off valves before beginning to drive.

6 . What is a tractor protection valve?

A valve to keep air in the brake system should there be a bad leak

A valve that prevents a truck from being stolen

A valve that prevents the driver from driving too fast

A tractor protection valve keeps air in a tractor or truck air brake system should the trailer break away or develop a bad leak. The valve will close automatically if the pressure drops to an unsafe level.

7 . When backing up your tractor while coupling it to a trailer, the trailer brakes should be:

Deactivated.

Locked.

Unlocked.

Correctly following the steps to couple and uncouple trailers is vital to safely operating a combination vehicle. Before backing your tractor under the trailer while coupling, make sure your trailer brakes are locked.

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2025 Alaska | Frequently Asked Questions

To acquire a Commercial Driver’s License (CDL) Tank endorsement in Alaska, you must first have a valid Alaska CDL. Then, study the Tank Vehicle section of the Alaska CDL manual, and pass the written knowledge test at your local DMV office. The endorsement will be added to your CDL upon successful completion of the test.

To obtain a Commercial Driver's License (CDL) Tank endorsement, you must first possess a valid CDL. It's essential to study the Tank Vehicle section of your state's CDL manual thoroughly. Afterwards, you'll need to pass a written knowledge test at your local Department of Motor Vehicles (DMV). Once you've successfully passed the test, the endorsement is added to your CDL.

While Alaska does not require specific training or experience for a CDL Tank endorsement, it's crucial to study the Tank Vehicle section of the Alaska CDL manual. You must pass a written knowledge test about tank vehicle safety, operations, and regulations. However, practical experience or training can be beneficial to pass the test and operate tank vehicles safely.

Yes, to obtain a CDL Tank endorsement in Alaska, you are required to pass an additional written test. This test is specifically designed to assess your knowledge of the safe operation of tank vehicles. The Alaska Commercial Driver License Manual provides useful information to help prepare for this test.

The written test for the CDL Tank endorsement covers various subjects relating to tank vehicles. Topics include inspecting tank vehicles, safe driving practices, managing the vehicle's weight, handling bulk packages of liquids or gases, and emergency procedures. Understanding these areas is crucial for safely operating a tank vehicle and passing the test.

The CDL Tank endorsement assessment is primarily a written test, focusing on knowledge rather than specific maneuvers. It evaluates your understanding of inspecting tank vehicles, safe driving practices, weight management, handling of liquid or gas bulk packages, and emergency procedures. However, general CDL tests will assess your practical driving skills and maneuvers.

Yes, there are limitations for drivers with a CDL Tank endorsement. They can only operate commercial motor vehicles designed to transport any liquid or gaseous materials within a tank. Also, they must comply with specific safety regulations regarding the handling and transportation of hazardous materials. Any violation of these rules can result in the suspension or revocation of the endorsement.

No, a valid Commercial Driver's License (CDL) with a Tank endorsement is required to transport liquid or gaseous materials in a tank vehicle. This endorsement ensures that drivers have the necessary knowledge and skills to handle such materials safely. Driving without the proper endorsement can result in serious penalties, including fines and license suspension.

You can add a CDL Tank endorsement to your existing Commercial Driver's License. However, you'll need to pass the tanker endorsement test, which covers specific regulations and safety measures for transporting liquid or gaseous materials. You don't need to apply for a new CDL, but there will be fees associated with adding an endorsement.

Yes, to handle hazardous materials with a CDL Tank endorsement, you must also obtain a Hazardous Materials (HazMat) endorsement. This involves passing a written test on the Federal Hazardous Materials Regulations and a TSA security threat assessment. These ensure you understand the safety procedures and risks associated with transporting hazardous materials.