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 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 20

Passing Score 16

1. If driving so slowly that you could impede other drivers, you should:

Drive in the left lane.

Drive while using your four-way flashers.

Drive without using any lights.

If you must drive so slowly that you will impede the flow of traffic, you should turn on your four-way flashers to alert drivers behind you (as long as local laws allow the use of flashers).

2. If you remain in neutral for too long while switching gears:

The vehicle will speed up.

You may have trouble putting the vehicle into the next gear.

You may kill the engine.

If you remain in neutral for too long while switching gears, you may have difficulty putting the vehicle into the next gear. If this happens, do not try to force the gear shift. Instead, return to neutral, release the clutch, increase the engine speed to match the road speed, and try again.

3. In the case of an engine fire, you should not:

Turn off the engine as soon as possible.

Shoot foam through the louvers.

Open the hood.

In the event of an engine fire, turn off the engine as soon as possible. Do not open the hood if you can avoid doing so.

4. Mirrors should be used:

Only when there may be an emergency.

Regularly.

By a helper to monitor your blind spots.

When driving, you should frequently check the mirrors on both sides of your vehicle.

5. What is a bobtail tractor?

A tractor without a trailer

A tractor attached to two trailers

A tractor with a tank

Tractors without semi-trailers are referred to as bobtail tractors. Operating a bobtail tractor requires drivers to exercise caution.

6. Which of the following is not an example of a distracted person who should concern motorists?

A driver talking to a passenger in their vehicle

A person sitting on a bench waiting for a bus

A construction worker on the side of the road

You should be cautious when you are near people who are not paying attention to the road. Drivers and pedestrians who are talking to someone may be distracted by the conversation and not fully paying attention to the road. Workers on or near the road may not be paying attention to traffic because they are focused on their work, and can themselves also be a distraction to drivers.

7. Hazardous materials placards are usually shaped like:

Circles.

Triangles.

Diamonds.

Hazardous materials warning placards are usually diamond-shaped.

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