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 two, three or four possible answer choices. To pass, the applicant must answer at least 16 questions correctly. Test questions come from the South Carolina Commercial Driver License 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. Which of the following is not an example of a driver who might be a hazard?

Explanation
Drivers with blocked vision may pose hazards to others on the road. Examples of such drivers include those who haven't scraped ice off of their windshields; those driving vehicles loaded with large items blocking the windows; and those who are driving rental trucks without being used to the limited rear visibility of a truck.

2. In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when:

Explanation
In vehicles equipped with an automatic tractor protection valve, the valve will pop out if air pressure drops to a level between 20 and 45 psi. When the valve pops out, the protection valve will close, stopping the flow of air.

3. Exercise will help a person sober up after drinking.

Explanation
The liver removes alcohol from the body at a fixed rate. Despite popular belief, tricks like exercising or taking a cold shower will not speed up this process. The only way to become sober after drinking is to allow the body the time it needs to get rid of the alcohol.

4. Skids happen when:

Explanation
Skids happen when tires' traction with the road surface decreases. This can be caused by over-braking, over-accelerating, over-steering, and driving too fast.

5. After a vehicle is started, the engine oil pressure should come up to normal:

Explanation
After a vehicle's engine is started, the engine's oil pressure should rise to its normal level within seconds. Do not drive a vehicle with oil pressure that is too low.

6. Carrying liquids in a leaking tank:

Explanation
When inspecting any style of tank, the most important thing for a driver to check for is leaks. Transporting any type of gas or liquid in a leaking tank is illegal.

7. Which of the following is acceptable if found during a pre-trip inspection?

Explanation
When inspecting your tires, verify that there is tread depth of at least 4/32 of an inch in every major groove on the front tires and tread depth of at least 2/32 of an inch in grooves on the other tires. Be sure that your tires are not too worn, are not cracked, have proper air pressure, and are all equally sized.
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