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 or four possible answer choices. To pass, the applicant must answer at least 16 questions correctly. Test questions come from the Oregon Commercial Driver 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. Most heavy vehicles use the ____ method when changing gears.

Explanation
Most heavy vehicles with unsynchronized manual transmissions require double clutching to change gears.

2. When approaching a vehicle for a pre-trip inspection, a driver should look under the vehicle:

Explanation
When approaching your vehicle to conduct an inspection, you should look underneath it to make sure there are no fresh oil, coolant, grease, or fuel leaks on the ground. Leaks can indicate unsafe defects on a vehicle.

3. When a tire goes flat, you may hear a loud bang. The truck will be affected:

Explanation
There may be a delay of a few seconds between the sound of a tire failing and the time that the vehicle is affected by the tire failure. Because of the short delay, a driver may initially believe that the sound came from another vehicle.

4. How should you brake if your vehicle's ABS is not working?

Explanation
Without a working Anti-Lock Braking System (ABS), your vehicle will still have normal brake function. Continue to drive and brake as you normally would and have your ABS serviced as soon as possible.

5. When trying to control a minor truck fire, what should you do before opening trailer doors?

Explanation
If you are experiencing a truck fire, you should not attempt to open trailer doors without first feeling the doors to see if they are hot. If the doors are hot, there may be a cargo fire. Leave the doors closed if there is a cargo fire.

6. When driving with a tank, the driver should:

Explanation
Sudden stops can produce dangerous surge in a tank carrying liquid cargo. To reduce the need for sudden stops, drivers of tanks should increase their following distance so they can begin braking well in advance of stops.

7. Class 1, Class 2.1, and Class 3 items should not be placed in a trailer with:

Explanation
The use of cargo heaters is not always permitted. When transporting materials that are categorized as Class 1 (Explosives), Class 2.1 (Flammable Gas), or Class 3 (Flammable Liquids) materials, heaters are generally prohibited.
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