Tank

This endorsement is required to haul any liquid or gaseous materials in a tank or tanks having a capacity of 1,000 gallons or more that is either permanently or temporarily attached to the vehicle or.. Read More

This endorsement is required to haul any liquid or gaseous materials in a tank or tanks having a capacity of 1,000 gallons or more that is either permanently or temporarily attached to the vehicle or chassis. To receive this endorsement, applicants must pass a test. The test consists of 20 multiple choice questions. Each question has three or four possible answer choices. To pass, the applicant must answer at least 16 questions correctly. Test questions come from the Arkansas Commercial Driver License Manual. Questions come from chapters covering: Safety, Air Brakes, Combination Vehicles, Tank Vehicles and Doubles and Triples. The Tank endorsement can be used with the Class A, B or C CDL.

Number of Question
Passing Score

1. If you notice hazardous materials leaking while you are driving, you should:

Explanation
If a cargo leak develops while you are carrying hazardous materials, do not continue driving any farther than safety requires. The farther you drive, the larger the contaminated area will become. You should park the vehicle, secure the area, and stay with the vehicle while sending someone else to get help.

2. You can find the identification numbers assigned to hazardous chemicals:

Explanation
The U.S. Department of Transportation (DOT)'s Emergency Response Guide provides information about hazardous materials, indexed by proper shipping names and hazardous materials identification numbers.

3. Of the following, surge is strongest in:

Explanation
Smooth bore tanks, which lack internal bulkheads to limit the flow of liquid, are the most vulnerable to surge.

4. Because of tanks' high centers of gravity, drivers of tanks should:

Explanation
Due to their high centers of gravity, tanks are especially prone to rollovers. When driving a tank vehicle, you should take curves well below the posted speed limit.

5. Wheel rims that have been welded should:

Explanation
Wheels and rims with welding repairs are not safe to be used. Replace any damaged wheels and rims.

6. A hand valve can be used to:

Explanation
If a tractor-trailer is equipped with a trailer brake hand valve, the hand valve can be applied to keep the vehicle from rolling backwards when the vehicle is started from a stop.

7. Smooth bore tanks have:

Explanation
Smooth bore tanks lack internal baffles. Compared to other types of tanks, unbaffled tanks are the most prone to front-to-back surge.
DMV Writen Test Logo