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

Number of Question
Passing Score

1. If confronted by an aggressive driver, you should:

Explanation
If confronted by an aggressive driver, the most important thing to do is try to get out of their way. Avoid making eye contact with the driver and do not let yourself be provoked by gestures. Do not try to challenge aggressive drivers by speeding up.

2. What can happen if one-fourth of the leaves in a leaf spring are missing when a vehicle is inspected?

Explanation
If at least one-fourth of the leaves in a leaf spring are missing, the vehicle will be put out-of-service until the defect is fixed.

3. If you must drive very slowly, you should:

Explanation
If you must drive slowly, you should warn drivers behind you by turning on your emergency flashers, as long as local law permits their use.

4. To make your vehicle more visible during the day, you should:

Explanation
Low beam headlights should be used for best visibility, even during the day. Using high beam headlights around other drivers can be dangerous.

5. Carrying gases or liquids in a leaking tank is:

Explanation
Before driving, be sure to check the tank's body for dents or cracks. You should also check around and under the vehicle for signs of leaks. It is a crime to carry gases or liquids in a leaking tank.

6. Hydroplaning:

Explanation
Hydroplaning is an effect in which a vehicle's tires lose traction with the surface of the road and instead glide along a layer of water. There does not have to be a large amount of water on the road for this to occur.

7. You will often have to drive your vehicle under bridges and overpasses. If approaching such an opening, you should:

Explanation
Do not assume that posted height clearances are accurate. If the road was repaved after the sign was posted, or if there is packed snow on the ground, the actual height of the opening may be different than what is indicated. If you are not confident that your vehicle will be able to safely clear an upcoming bridge or overpass, you should slow down and find another path, if possible.
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