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 Commercial Driver Guide. Questions come from chapters covering: Cargo, Air Brakes and Tank Vehicles. The Tank endorsement can be used with the Class A, B or C CDL.

Number of Question
Passing Score

15. In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when:

Explanation
In vehicles equipped with an automatic tractor protection valve, the valve will pop out if air pressure drops to a level between 20 and 45 psi. When the valve pops out, the protection valve will close, stopping the flow of air.

16. Which of the following is not a sign of fatigue?

Explanation
Driving while fatigued is dangerous. Warning signs of fatigue include difficulty focusing; repeated yawning or rubbing of the eyes; daydreaming or wandering thoughts; and drifting out of your lane.

17. A tank should never be transported if:

Explanation
It is illegal transport liquids or gases in a leaking tank. Always make sure that intake, discharge, and cut-off valves are in the correct positions before loading, unloading, or moving a tank vehicle.

18. When carrying Division 1.1, 1.2, or 1.3 explosives, your vehicle should not be:

Explanation
Except when parking briefly to perform necessary functions for vehicle operation (such as refueling), never park a vehicle carrying Division 1.1, 1.2, or 1.3 explosives within 300 feet of a bridge, tunnel, or building. Never park such a vehicle within five feet of the traveled portion of the road.

19. Rims with welding repairs:

Explanation
Wheels or rims that have had welding repairs should never be used.

20. When checking your tires, which of the following is not an issue to correct?

Explanation
Problems to check for when inspecting tires include: air pressure that is too low or too high; using radial and bias-ply tires together; tread depth of less than 4/32 of an inch in major grooves on front tires; and tread depth of less than 2/32 of an inch on all other tires.
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