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 Commercial Driver Guide. 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
1. The trailer hand valve should be used:
The trailer hand valve (also referred to as the "trolley valve" or "Johnson bar") works the trailer brakes and should be used only when testing them. Using the trailer hand valve while driving could result in a skid.
2. If driving on a surface with poor traction, a driver should accelerate slowly:
To avoid a loss of control, you should accelerate slowly when driving in poor-traction conditions, such as rain or snow.
3. If your vehicle gets stuck on railroad tracks, you should:
If your vehicle gets stuck on railroad tracks for any reason, you should immediately exit the vehicle and walk away from the tracks. Contact the proper emergency authorities.
4. An indicator that cargo contains hazardous materials is:
Packaging can be an indicator of whether or not materials are hazardous. Cylinders and drums are often used to hold and transport hazardous materials.
5. Backing with a trailer is dangerous because:
Backing a truck is always dangerous because the driver may not be able to see everything behind them. CMV operators should avoid backing whenever possible.
6. When a tank that is divided by bulkheads is being loaded with liquid cargo, most of the weight should be placed:
When filling a tank that is divided by bulkheads, make sure that you do not place too much weight on the front or rear of the vehicle.
7. To prevent a vehicle from rolling backward when beginning to move forward from a stopped position, you should: