- Updated for January 2025
- Based on 2025 OK commercial driver's license manual
Free Oklahoma CDL HazMat Practice Test 2025
Oklahoma! Where the wind comes sweepin’ down the plain! If you’ve driven through the state’s gentle plains and prairies, the Ouachita and Ozark Mountains, or the narrow, unpaved, or low-maintenance roads in the rural areas, you’ve likely met the proud people of Oklahoma. Just like the many casts of the musical, Oklahoma’s landscape is diverse, offering challenges and opportunities to drivers who add the Hazardous Materials (Hazmat) endorsement to their Commercial Driver’s License (CDL). This is an amazing way to expand your job opportunities and increase your earning potential! Transporting cargo in Oklahoma comes with challenges, but the rewards offered in this career and the additional opportunities available with the Hazmat endorsement make it worth the effort.
To transport materials the U.S. government has deemed hazardous, you’ll need a Hazmat endorsement. In the Sooner State, hazardous materials transported include petroleum products, crude oil and natural gas, agricultural chemicals, industrial chemicals, and explosives. Some prominent organizations in Oklahoma, such as Devon Energy and Chesapeake Energy in Oklahoma City (oil and natural gas), ONEOK in Tulsa (natural gas), Phillips 66 in Bartlesville (oil refining and energy), Cargill and Simplot (agriculture and food processing), and Linde in Tulsa (distributor of gases and industrial chemicals) rely on Hazmat drivers for transport.
Now that we’ve gotten your attention with the sheer number of opportunities unlocked with this endorsement, let’s look at how to obtain it. First, you must complete a mandatory fingerprinting and background check conducted by the Transportation Security Administration (TSA). The results can take weeks, so get that started and use the wait time to study and practice for the second step: the SOK knowledge test. This test covers federal regulations, substance handling, packaging, quantity limits, and transport configurations for hazardous materials. With a score of 80% on Oklahoma’s 30-question knowledge test, you will pass the test (Oklahoma CDL Handbook 2025).
Oklahoma can use more Hazmat drivers, so we’ve simplified the process for you with Oklahoma SOK Hazmat Endorsement practice tests that present only the information needed, present immediate feedback on wrong responses, and resemble what you will face on the official SOK test. Once you receive your TSA results and feel prepared, you’ll visit the SOK with the necessary documents, pay the fees, and pass the test.
- Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
- Triple-checked for accuracy
What you need to know
What to expect on the actual OK SOK exam
questions
correct answers to pass
passing score
Helpful links
List of questions (classic view)
- What is a technical name?
- Do you need to stop before a railroad crossing if you are hauling 100 pounds of Division 4.3 materials?
- If you are already carrying 100 pounds of silver cyanide, what precautions must you take if you are given papers at a dock to carry 100 cartons of battery acid?
- What is the purpose of a driver placarding his or her vehicle?
- Besides the shipping papers and the packages, the other two places where the hazardous material identification number must appear are
- Which of the following is NOT an acceptable type of marking for hazardous materials?
- Which of the following are necessary qualifications for non-bulk packaging?
- What are the major differences between cargo tanks and portable tanks?
- Which of the following hazard classes uses a transport index to determine how much of it can be loaded on a single vehicle for transport?
- In what location must you keep your shipping papers that describe any hazardous materials?
- How often should you check the tires on a placarded trailer that has dual tires?
- When shippers package the material, they are trying to
- A safe haven is
- Which of the following materials are acceptable floor liners for transporting Division 1.1 or 1.2 materials?
- What action should you take if you discover your hazardous materials shipment leaking at a rest stop but there is no phone available?
- You must NEVER smoke or perform any activity involving fire within 25 feet of
- If you are carrying Division 1.2 or 1.3 materials, how far away must you park from a bridge, tunnel, or building?
- A placarded vehicle must carry a fire extinguisher with a minimum rating of
- If you are carrying Division 1.2 or 1.3 materials, how far away must you park from the traveled portion of the roadway?
- Where are the two main places that the hazardous material identification number appears?
- Which of the following three hazard classes should NOT be placed into a temperature-controlled trailer (one with a heater/air conditioner unit)?
- To determine if you need to use placards, you do NOT need to know
- Your engine runs a pump when you are delivering compressed gas. After finishing the delivery, when should you turn off the engine?
- Cargo tanks are
- The Emergency Response Guidebook (ERG)
- A hazard class name or ID number may not be used to describe
- If there is an accident involving hazardous materials, who reports it to the proper government agency?
- Carriers must give each driver who transports Division 1.1, 1.2, or 1.3 materials
- The hazardous material identification numbers must be displayed on portable tanks, cargo tanks, and other bulk packaging. The regulations require black _______ numbers.
- A vehicle placarded for hazardous materials must have placards on ____ sides.
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