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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..

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 four possible answer choices. To pass, the applicant must answer at least 16 questions correctly. Test questions come from the North Dakota Commercial Driver Guide. Questions come from chapters covering: Driving Safely, Transporting Cargo, Air Brakes, Tank Vehicles, Hazardous Materials and Combination Vehicles. The Tank endorsement can be used with the Class A, B or C CDL.

Passing grade:

If a vehicle is found to be over-length during a pre-trip inspection, the driver should:

Explanation
If a pre-trip inspection reveals a load to be oversize, the driver must confirm that all required signs, flags, lamps, and reflectors are safely and properly mounted, and that and all required permits are in their possession.

A skid caused by acceleration can likely be solved by:

Explanation
Skids caused by acceleration frequently occur on slippery road surfaces. These skids can generally be resolved by the driver removing their foot from the accelerator.

The easiest way to recognize that your trailer has begun to skid is to:

Explanation
The easiest way to spot a trailer skid is to use your mirrors. Any time you brake hard, check your mirrors to ensure that your trailer is still in its proper position.

Trailers built before 1975 are:

Explanation
Trailers built before 1975 are not required to have spring brakes. When parking a trailer without spring brakes, be sure to use wheel chocks to prevent the trailer from rolling.

While driving, if it is discovered a vehicle's ABS is not working, the driver should:

Explanation
If an Anti-Lock Braking System (ABS) is not working, the vehicle's basic braking functions are still intact. The driver should continue to drive and brake in a normal fashion.

To drive safely, it is important to remember:

Explanation
To drive safely, it is important to remember how much distance your vehicle will need to stop. Stopping distance for a vehicle can change with road conditions, weather conditions, and the quality of cargo in the vehicle's tanks.

Drivers are usually the least alert:

Explanation
Drivers are usually less alert when driving at night, especially after midnight.
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