Instructions

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 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 20

Passing Score 16

1. Which of the following is not an example of a driver who might be a hazard?

A driver operating a vehicle without first scraping ice off the windshield

The operator of a rental truck

The driver of a station wagon with items covering the back windows

A person operating a pick-up truck

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:

Air pressure drops to a level between 20 and 45 psi.

You are experiencing a trailer jackknife.

Wheels have regained traction after a skid.

Air pressure is above 45 psi.

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.

True

False

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:

Tires lose their grip on the road.

There is too much weight in the trailer.

ABS kicks in.

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:

Within seconds.

Within five minutes.

Within three minutes.

After five minutes.

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:

Is acceptable if it is only for a short distance.

Is illegal.

Is not dangerous if it is raining.

Is acceptable if you are running behind schedule.

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?

Tires in mismatched sizes

Tread depth of 2/32 of an inch in the grooves of the front tires

Tires manufactured by different makers

Cracks in the tires

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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