Oklahoma DMV CDL HazMat Quick Practice Test

Oklahoma DMV CDL HazMat Quick Practice Test For 2026

CDL Class A, B or C. Complete CDL driver training course. All the questions in this test are from the official DMV written exam. You can use our free online tests to evaluate how likely you are to pass the official DMV test. Or you can just cut to the chase and increase your chances of passing by upgrading to Premium Membership and unlock official DMV tests. In addition, you will also receive a master cheat sheet which contains all your state’s DMV questions and answers. Premium membership also unlocks a smart tracker which keeps an inventory of all incorrectly answered questions for easy, fast and effective revision. Practice with our free tests or hit Upgrade button below for premium access and increase your chances of passing your DMV written exam.

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Quick Facts:

Number of Questions – 20

Passing Percentage – 80%

Test Type – Free Test

1. Who is responsible for identifying the hazard class of materials being shipped?

The shipper
The carrier
The driver
The mechanic

2. If a driver stops and leaves their vehicle while transporting hazardous materials, the shipping papers should be:

Carried by the driver.
Left in the front seat of the cab.
Placed in a box under the passenger seat.

3. Identification numbers assigned to chemicals can be found:

In the DOT Emergency Response Guidebook.
In the truck's operation manual.
On the EPA’s website.
At fuel stations.

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

A heater.
An air conditioner.
Other items.

5. Water on bridges:

Usually freezes before water on other parts of a roadway.
Usually freezes after water on other parts of a roadway.
Will not freeze.
Is not a concern in cool weather.

6. If planning to stop on the road to unload cargo, you should:

Stop suddenly, since you are already on the road.
Warn other drivers by tapping your brakes.
Wave your arm out the window to get the attention of other drivers.

7. Hazardous materials shipping papers may not be kept:

In a pouch on the driver’s door.
In a pouch on the passenger’s side door.
Within reach of the driver while the seat belt is fastened.

8. When loading containers of hazardous materials, you should not use:

Dollies.
Hooks.
Straps.
Other helpers.

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