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 Wisconsin Commercial Driver’s Manual. Questions come from chapters covering: Driving Safely, Tank Vehicles, Hazardous Materials, Air Brakes and Combination Vehicles. The Tank endorsement can be used with the Class A, B or C CDL.

Number of Question
Passing Score

1. ____ is a thin layer of ice that forms on road surfaces.

Explanation
Black ice is a thin layer of ice that is clear enough for the road surface to be seen through it. A road covered in black ice may look like it is merely wet. You should be very careful when temperatures are below freezing and the road looks wet.

2. Containers of hazardous materials must be:

Explanation
Containers of hazardous materials must be braced so that they will not fall, slide, or bounce around during transportation.

3. A hazardous material's identification number should appear:

Explanation
A material's ID number must appear on its accompanying shipping paper as well as on its packaging. It also must appear on cargo tanks and other bulk packaging.

4. If your brakes fail on a downgrade, your best hope to stop is to:

Explanation
If your brakes fail on a downgrade, you will have to look outside your vehicle for a way to stop. Using an escape ramp is the safest way to stop your vehicle.

5. A vehicle should be equipped with all of the following, except:

Explanation
Commercial vehicles should always carry the proper emergency equipment. Be sure your vehicle is equipped with at least one fire extinguisher; spare electrical fuses, unless the vehicle is equipped with circuit breakers; and warning devices for parked vehicles, such as warning triangles, fuses, or liquid burning flares.

6. Baffled liquid tanks are:

Explanation
Baffled liquid tanks contain bulkheads with holes in them that allow the movement of liquid. This helps to inhibit the forward and backward surge of liquids. Baffled liquid tanks do not prevent side-to-side surge and may still allow rollovers.

7. The minimum acceptable tread depth for rear tires is:

Explanation
When inspecting your tires, verify that there is at least 4/32 of an inch of tread depth in every major groove on the front tires, and tread depth of at least 2/32 of an inch on the other tires. Tires on the same vehicle should all be the same size.
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