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 Iowa 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 you are driving in fog, you should not:

Turn on the four-way flashers.

Slow down.

Use your high beam lights.

If you must drive in fog, be sure to slow down. Turn on your flashers and low beam headlights.

2. An example of required emergency equipment is:

A spare electrical fuse.

A loud horn.

A battery-operated flashlight.

All commercial motor vehicles are required to be equipped with the proper emergency equipment. This may include spare electrical fuses; three red reflective triangles, six fuses, or three liquid burning flares; and at least one properly charged and rated fire extinguisher.

3. A driver operating a tank equipped with baffles should be particularly wary of:

Front-to-back surge.

Side-to-side surge.

End-to-end surge.

While baffles in a tank inhibit forward and backward surge, they do not prevent side-to-side surge. Surge to the sides can cause rollovers.

4. When a vehicle is started, the coolant temperature should:

Decrease.

Rise slowly.

Jump quickly.

After an engine is started, the coolant temperature should rise gradually to a normal operating range.

5. One way to prevent a surge is to:

Brake in well advance, eliminating sudden stops.

Accelerate quickly.

Drive below the speed limit.

To reduce the risk of surge in a liquid tank, you should make sure to brake well in advance of stops. Increase your following distance to reduce the need for sudden stops.

6. Steering wheel play of more than ____ can make steering difficult.

10 degrees

25 degrees

50 degrees

A steering wheel should have no more than 10 degrees of play. This is equal to about two inches of movement at the rim of a 20-inch wheel. If there is more play than this, it may be difficult to steer.

7. Skids caused by over-acceleration can usually be resolved by:

Removing your foot from the accelerator.

Braking.

Swerving to the right.

A skid caused by over-acceleration can be resolved simply by removing your foot from the accelerator. Skids of this nature happen most frequently on surfaces covered in snow or ice.

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