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 possible answer choices. To pass, the applicant must answer at least 16 questions correctly. Test questions come from the Oklahoma 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. Cargo tanks should never be completely full because:

Explanation
Liquids expand as they get warmer and drivers must allow extra space in a tank to accommodate this expansion. Different liquids expand to different degrees, so drivers must be aware of the outage requirements of the specific load they are carrying.

2. On a slippery surface, stopping distance:

Explanation
A vehicle's regular stopping distance increases on slippery surfaces because there is less available traction.

3. If you discover that your cargo is leaking, you should:

Explanation
If you discover a leak in a cargo of hazardous materials, identify the materials in question by using the shipping papers, labels, or package location. Do not touch the leaking material.

4. You may be an aggressive driver if you:

Explanation
Avoid being an aggressive driver by being realistic about your travel time, making allowance for delays, maintaining reasonable following distances, and not making hand gestures that could anger another driver.

5. If there is a fire in your vehicle, you should not:

Explanation
In the event of a vehicle fire, you should leave the road and stop in an open area. Do not pull into a service station as fuels at the service station could catch fire. Report the fire and your location to emergency services.

6. While driving a vehicle, if an unusual noise or feeling occurs, the driver should:

Explanation
Use your senses during trips to help you identify mechanical issues. If you see, hear, smell, or feel anything that could indicate trouble, you should stop and check it out.

7. Before beginning a trip, you should:

Explanation
Before a trip, you should ensure that air reaches all air brakes on all trailers by opening up the rear emergency line and service line shut-off valves and listening for escaping air. Close both shut-off valves before beginning to drive.
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