Tank Endorsement Test | Alabama 2026 #2

Train for FREE with our Alabama tank endorsement practice test online. 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 AL tank license in 2026, 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 CDL tank vehicle endorsement may vary from state to state.

Number of Question 20

Passing Score 16

Number of Tests 20

1 . Which gas would cause concern due to a faulty exhaust system?

Oxygen

Carbon monoxide

Nitrogen

A leaking exhaust system can introduce carbon monoxide, which is poisonous, into the cab or sleeper berth.

2 . How is a hazardous materials warning presented?

On a placard

By wrapping the package in orange

By placing the item away from other cargo and covering it with a sign

With flashing lights

Signs are placed on the outside of vehicles and bulk packages to warn drivers and others about hazardous materials. These diamond-shaped signs are known as "placards."

3 . The amount of liquid cargo being loaded into a tank should depend on:

The speed limits on the route.

Legal weight limits.

The color of the cargo.

The length of the trip.

Factors that affect how much liquid is safe to load into your tank include how much the liquid will expand in transit, the weight of the liquid, and legal weight limits. If you are loading a particularly dense liquid, take special care to ensure that you do not exceed legal weight limits.

4 . When changing lanes, you should not:

Use your turn signal.

Check your mirrors.

Use your cell phone.

Always signal and check your mirrors when turning and changing lanes.

5 . A pre-trip vehicle inspection:

Is not required if the driver regularly uses the vehicle.

Is not required for trips under 100 miles.

Is only to be performed by a mechanic.

Is required by law.

Drivers are required by state and federal law to inspect their vehicles before beginning to drive.

6 . What is traction?

Friction between the tires and road

Tires' rates of rotation

The length of time needed to activate the brakes

Traction is friction between your tires and the surface of the road. Adequate traction is necessary for braking and steering.

7 . The best way to avoid glare at night from oncoming vehicles is to:

Wear sunglasses.

Close your eyes as vehicles approach.

Look to the right side of road.

Use your high beams.

To avoid being blinded by the lights of oncoming vehicles, you can glance to the right side of the road until the vehicle has passed.

Study tip:

Reduce your study time from hours to minutes with a DMV exam “Cheat Sheet”

99.2% of people who use the cheat sheet pass the FIRST TIME

Click Here
Full Cheat Sheet

99.2%

99.2% of people who use the cheat sheet pass the FIRST TIME

2026 Alabama | Frequently Asked Questions

To secure a CDL Doubles/Triples endorsement in Alabama, you must already possess a valid commercial driver's license (CDL). You'll then need to pass the Doubles and Triples Endorsement Knowledge Test. This test covers topics such as coupling and uncoupling, inspecting doubles and triples, and the proper procedures for towing double/triple trailers.

To obtain a CDL Doubles/Triples license, you must first have a valid commercial driver's license (CDL). Next, you'll need to pass the Doubles/Triples Endorsement Knowledge Test. This test covers areas such as coupling and uncoupling, inspecting doubles and triples, and correct towing procedures. Finally, pay the necessary fees to add the endorsement to your CDL.

While Alabama doesn't mandate specialized training for a CDL Doubles/Triples endorsement, it's recommended to study the Doubles/Triples section in the CDL manual thoroughly. This will prepare you for the written knowledge test at your local DMV. Practical experience driving such vehicles can also be beneficial, but it's not a legal requirement.

Yes, to obtain a CDL Doubles/Triples endorsement, you must pass the Doubles/Triples Endorsement Knowledge Test. This written test covers specific areas related to driving double and triple trailers, such as coupling and uncoupling, inspecting doubles and triples, and the correct procedures for towing these types of trailers.

The CDL Doubles/Triples endorsement test is a written knowledge test, not a skills test. It covers topics like coupling and uncoupling, inspecting doubles and triples, and correct towing procedures. However, practical skills like maneuvering such vehicles safely are important to learn during training, even though they are not directly tested during the endorsement exam.

No, it's not permissible to operate double/triple trailers without a valid CDL Doubles/Triples endorsement in Alabama. This endorsement is required by law to ensure that drivers have the necessary knowledge and skills to operate these types of vehicles safely. Operating without the proper endorsement can result in fines and penalties.

You can add the CDL Doubles/Triples endorsement to your existing Commercial Driver's License. You don't need to initiate a completely new application. However, you will need to pass the Doubles/Triples Endorsement Knowledge Test and pay any associated fees to obtain this endorsement. Always check with your local DMV for specific procedures and requirements.

Yes, there are limitations for drivers with a CDL Doubles/Triples endorsement. These drivers can only operate vehicles that are specifically designed for double or triple trailers. They can't exceed the weight limits set by federal and state laws, and they must comply with hours of service regulations to prevent fatigue-related accidents. Additionally, specific routes may be restricted for these vehicles.

In Alabama, the maximum legal weight for a double or triple trailer setup is 80,000 pounds, depending on the trailer's axle configuration. The maximum length for any one trailer is 53 feet, but the combined length of all trailers can't exceed 65 feet. Violating these restrictions may result in penalties or fines.

Yes, drivers with a CDL Doubles/Triples endorsement must follow specific safety guidelines. These include conducting pre-trip inspections, understanding how to couple and uncouple correctly, and knowing how to handle the high rollover risk associated with these trailers. They must also ensure proper weight distribution in trailers and follow the rules for maintaining safe following distances. Compliance with all federal and state regulations is mandatory.