Combination Vehicles Practice Test | Tennessee 2024 #1

Train for FREE online with our Tennessee 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 TN combination license in 2024, 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 . What is a bobtail tractor?

A tractor without a semi-trailer

A tractor with two semi-trailers

A tractor that travels faster than the speed limit

Tractors without semi-trailers are referred to as "bobtail tractors." Bobtail tractors are difficult to operate and drivers must exercise caution.

2 . 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.

3 . A loss of air pressure in the emergency line will cause:

The service brakes to activate.

The tractor protection valve to close.

The rear trailer to detach from the combination.

The suspension springs to extend.

The tractor protection valve keeps air in the trailer's braking system should the trailer break away or develop a leak. A loss of air pressure in the emergency line will cause the tractor protection valve to open and the emergency trailer brakes to activate.

4 . To control surge when stopping, you should not:

Keep a steady pressure on the brakes.

Brake well in advance of a stop.

Release the brakes too quickly.

To reduce the risk of a surge in a tank vehicle, slow or stop while keeping a steady pressure on the brakes and do not release the brakes too early. Brake well in advance of a stop and increase your following distance.

5 . If the emergency air line loses pressure:

The service brakes will activate.

The tractor protection valve will close.

The rear trailer will detach from the combination.

6 . Fully-loaded rigs:

Are less likely to roll over than empty rigs.

Are more likely to roll over than empty rigs.

Are just as likely to roll over as empty rigs.

Fully-loaded rigs are more vulnerable to rolling over than empty rigs because the weight of the cargo gives the vehicles higher centers of gravity.

7 . Rearward amplification refers to:

The amount of noise projected to the rear of a vehicle.

The cause of the "crack-the-whip" effect.

The number of trailers that can be pulled by a tractor.

Vehicles with trailers are vulnerable to rollover due to the "crack-the-whip" effect, which is caused by rearward amplification.

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2024 Tennessee | Frequently Asked Questions

In Tennessee, to acquire a CDL Tank endorsement, you must first have a Commercial Driver's License (CDL). Then, you need to pass the Tank Vehicle written test. You can prepare for this test by studying the related section in the Tennessee Commercial Driver’s License Manual. After passing the test, you pay a fee to add the endorsement to your license.

To obtain a CDL Tank license in Tennessee, you must have a Commercial Driver's License (CDL). Next, you need to pass the Tank Vehicle written test, which includes questions about inspecting and driving tank vehicles, and safe driving rules. The Tennessee Commercial Driver’s License Manual can help in preparation. After passing, pay the required fee to add the endorsement.

While specific training or experience isn't legally mandatory to obtain a CDL Tank endorsement in Tennessee, it's highly recommended. Knowledge of inspecting and driving tank vehicles, and understanding safe driving rules is crucial. This information can be found in the Tennessee Commercial Driver’s License Manual. Practical experience or training can be beneficial for passing the Tank Vehicle written test.

Yes, to obtain a CDL Tank endorsement in Tennessee, you must pass an additional written test. This test covers specific knowledge related to the safe transport of liquid and gaseous materials. Studying the Tank Vehicle section of the Tennessee CDL manual will help prepare you for this exam.

The written test for the CDL Tank endorsement in Tennessee covers several subjects, including inspecting tank vehicles, driving tank vehicles, and safe driving rules. It may also include questions about handling high center of gravity, surge, outbound inspection, special purpose equipment and operation, and emergency controls. The Tennessee Commercial Driver’s License Manual provides comprehensive information on these topics.

The CDL Tank endorsement assessment in Tennessee primarily tests your knowledge rather than specific skills or maneuvers. The written exam focuses on understanding safe driving rules, inspecting tank vehicles, and driving tank vehicles. It might cover handling high center of gravity, surge, outbound inspection, and emergency controls. Practical skills are typically assessed during the general CDL driving test.

Yes, drivers with a CDL Tank endorsement in Tennessee must adhere to certain regulations. They must not exceed the weight limit for their vehicle, maintain logbooks of hours driven, and follow safety protocols for transporting hazardous materials. Additionally, they must pass regular drug and alcohol tests and maintain a clean driving record. Failure to comply can result in fines, suspension, or loss of the endorsement.

No, transporting liquid or gas materials without a valid CDL Tank endorsement in Tennessee is illegal. This endorsement is required to operate a commercial motor vehicle designed to transport any liquid or gaseous materials within a tank attached to the vehicle. Violation of this rule can lead to severe penalties, including fines and suspension of the driver's CDL.

Yes, you can add a CDL Tank endorsement to your current license in Tennessee. You don't need a fresh application. However, you must pass a knowledge test specific to transporting liquids or gases in a tank. Once you pass the test and pay the required fee, the endorsement will be added to your existing Commercial Driver's License (CDL).

Yes, to handle hazardous materials with a CDL Tank endorsement in Tennessee, drivers must also have a Hazardous Materials (HazMat) endorsement. This requires passing an additional knowledge test, a TSA background check, and fingerprinting. It's vital to follow these regulations for safety and to avoid legal repercussions.