Oklahoma Hazmat Test
You'll haul crude out of the Permian Basin and chemicals through Oklahoma City — this test makes sure you know the rules before you hit I-35.
Select Test Mode
Oklahoma Hazmat test: 30 questions, 80% to pass. Focus on placarding, loading, and what to do when a tornado hits your route.
Key Topics
- •Placarding and hazard classes
- •Loading, unloading, and segregation
- •Emergency response and security plans
About the Oklahoma Hazmat Test
Topics Covered
- ✓Placarding and labeling — Oklahoma inspectors at the weigh stations on I-40 will pull you over for a missing placard faster than a summer thunderstorm.
- ✓Loading and unloading — Especially for tankers hauling crude or chemicals. Oklahoma's heat can cause expansion, so knowing the fill limits matters.
- ✓Hazard classes and segregation — You can't put oxidizers next to flammables. Oklahoma examiners drill this because of the mix of products on the Cushing pipeline hub.
- + 3 more topics
📘 Study Tips & State Info
Oklahoma DMV examiners want you to know the placarding table cold. They'll ask: 'How many kilograms of a Division 6.1 material require a placard?' That's 454 kg (1,000 lbs). Memorize the threshold for each hazard class. Don't guess.
Loading and unloading questions are procedural. When the manual says 'ground the tank before filling,' think about a hot summer day at a loading rack in Cushing. That static spark will ignite vapors. Oklahoma has plenty of heat and dry conditions — static electricity is a real concern.
Security plans are big here. Oklahoma has several high-value hazmat targets: refineries, the pipeline hub, and chemical plants near Ponca City. The test expects you to know your carrier's security plan and how to report suspicious activity. It's not just federal rules — it's common sense for Oklahoma roads.
Finally, study the Oklahoma-specific emergency response numbers. The Oklahoma Department of Environmental Quality (DEQ) and the Oklahoma Highway Patrol have their own hotlines. The test might ask what to do if you spill hazmat on a state highway. Answer: call 911, then your carrier, then the DEQ if required.
Oklahoma CDL testing is handled by the Oklahoma Department of Public Safety (DPS). You can take the Hazmat written test at any DPS exam site, but you'll need an appointment. Walk-ins are rarely accepted in larger offices like Oklahoma City, Tulsa, and Lawton. Bring your CDL permit, a valid Medical Examiner's Certificate, and your TSA Hazmat endorsement receipt if you've already done the background check.
The test fee is $4 per endorsement. That's right — four bucks. But the TSA background check costs $86.50 and requires fingerprinting at an approved center. Do that first, because you can't take the Hazmat skills test without the TSA clearance. Processing can take 4-6 weeks, so plan ahead.
Oklahoma also requires Hazmat drivers to complete a security awareness training course. Your employer might provide it, or you can take an online course approved by the DPS. Keep that certificate with your CDL file — troopers ask for it during roadside inspections.
About the Oklahoma Hazmat Test
The Hazmat endorsement is required for any Oklahoma CDL holder who transports hazardous materials in quantities requiring placards. That includes drivers hauling crude oil from the SCOOP and STACK plays, anhydrous ammonia for wheat farmers, or chlorine to water treatment plants. Oklahoma's highways — I-35, I-40, I-44 — carry millions of tons of hazmat every year. You need to know the rules cold.
The test covers federal hazmat regulations (49 CFR) with Oklahoma-specific twists. Expect questions about proper placarding for different hazard classes, loading and unloading procedures, and the security plan your carrier must have. Oklahoma examiners pay close attention to segregation tables — they've seen too many close calls at the Port of Catoosa.
You'll also face questions about emergency response. In Oklahoma, that means knowing what to do if you spill diesel on a rural highway or if a tornado warning hits while you're carrying propane. The Oklahoma Department of Environmental Quality has specific reporting requirements, and the test reflects that.
Passing this test gets you the H endorsement on your CDL. You'll also need a Transportation Security Administration (TSA) background check and fingerprinting before you can take the skills test. Start with the written exam here.
Topics Covered
Study Tips
Oklahoma DMV examiners want you to know the placarding table cold. They'll ask: 'How many kilograms of a Division 6.1 material require a placard?' That's 454 kg (1,000 lbs). Memorize the threshold for each hazard class. Don't guess.
Loading and unloading questions are procedural. When the manual says 'ground the tank before filling,' think about a hot summer day at a loading rack in Cushing. That static spark will ignite vapors. Oklahoma has plenty of heat and dry conditions — static electricity is a real concern.
Security plans are big here. Oklahoma has several high-value hazmat targets: refineries, the pipeline hub, and chemical plants near Ponca City. The test expects you to know your carrier's security plan and how to report suspicious activity. It's not just federal rules — it's common sense for Oklahoma roads.
Finally, study the Oklahoma-specific emergency response numbers. The Oklahoma Department of Environmental Quality (DEQ) and the Oklahoma Highway Patrol have their own hotlines. The test might ask what to do if you spill hazmat on a state highway. Answer: call 911, then your carrier, then the DEQ if required.
Oklahoma Specific Information
Oklahoma CDL testing is handled by the Oklahoma Department of Public Safety (DPS). You can take the Hazmat written test at any DPS exam site, but you'll need an appointment. Walk-ins are rarely accepted in larger offices like Oklahoma City, Tulsa, and Lawton. Bring your CDL permit, a valid Medical Examiner's Certificate, and your TSA Hazmat endorsement receipt if you've already done the background check.
The test fee is $4 per endorsement. That's right — four bucks. But the TSA background check costs $86.50 and requires fingerprinting at an approved center. Do that first, because you can't take the Hazmat skills test without the TSA clearance. Processing can take 4-6 weeks, so plan ahead.
Oklahoma also requires Hazmat drivers to complete a security awareness training course. Your employer might provide it, or you can take an online course approved by the DPS. Keep that certificate with your CDL file — troopers ask for it during roadside inspections.