Warning placards are required to be used any time a vehicle is carrying designated types and amounts of hazardous materials. A placarded vehicle must display placards on all four of its sides.

Any time a vehicle is carrying hazardous materials.

When there is extra space on a truck.

Only when the amount of hazardous materials on a truck exceeds 200 pounds.

On a wet road, it is possible for a vehicle's tires to lose traction with the road surface and begin to glide along on the layer of water. This is referred to as hydroplaning. Hydroplaning can occur at speeds as low as 30 mph.

The tires lose contact with the road.

The trailer disengages from the tractor.

The vehicle becomes easier to control.

Wheels or rims that have had welding repairs are not safe to be used.

Be placed on tires in the rear of the vehicle.

Regrooved, recapped, or retreaded tires are prohibited on the front wheels of a bus.

Should not be used on the front of a bus.

Should not be used on any vehicle.

Should not be used on the front of a bus.

Should not be used on trucks hauling gravel.

Height warnings are often, but not always, posted on low bridges. If you are unsure if you will be able to clear an overhead object, go slowly.

Height warnings may be posted, but do not have to be.

Height warnings must always be posted.

Height warnings must be posted at least twice.

Height warnings may be posted, but do not have to be.

Tank Endorsement Test | Oklahoma 2024 #1 Page 3 of 3

Train for FREE with our Oklahoma tank endorsement practice test online. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a OK tank license in 2024, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that DMV requirements for issuing a CDL tank vehicle endorsement may vary from state to state.

Number of Question 20

Passing Score 16

Number of Tests 20

Tank Endorsement Test | Oklahoma 2024 #1 Page 3 of 3

15 . When driving in winter, which of the following should receive extra attention in a pre-trip inspection?

16 . Placards should be used:

17 . What happens when a vehicle hydroplanes?

18 . Wheel rims that have been welded should:

19 . Regrooved tires:

20 . On low bridges:

See the exact questions that will be on the 2024 DMV exam.

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