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Oklahoma Hazmat Test

Many Oklahoma hazmat drivers haul crude oil from the Permian Basin up I-35.

147
Questions
80%
To Pass
40
Minutes

147 questions · 40 min time limit · 80% to pass

Opens in a practice window — choose your mode inside.

JM

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026

All questions sourced from the official Oklahoma CDL handbook and FMCSA regulations.

About the Oklahoma Hazmat Test

Oklahoma’s highways carry more hazardous materials than you’d think. From crude oil tankers on I-35 to anhydrous ammonia trucks on US-412, our state moves dangerous goods every day. You need to know the rules inside and out.

This practice test covers federal hazmat regulations, Oklahoma-specific routing restrictions, and emergency response procedures. Our questions come straight from the Oklahoma CDL manual. You’ll face 30 multiple-choice questions, just like the real test.

Oklahoma weather adds extra challenges. Ice storms on I-44, high winds on the Turner Turnpike, and summer heat that can degrade cargo. Our test prepares you for those real-world conditions.

We don’t waste your time. Each question gives you immediate feedback with the correct answer and an explanation. Pass the Oklahoma DMV hazmat test on your first try.

Topics Covered

✓Placarding and labeling – Oklahoma inspectors check these closely at weigh stations.
✓Shipping papers – You’ll need to present them during roadside inspections on I-40.
✓Hazard classes – Knowing class 3 flammable liquids matters because Oklahoma’s oil industry depends on them.
✓Loading and unloading – Special rules apply when you load crude at tank farms near Cushing.
✓Emergency response – Our tornadoes and floods require you to react fast.
✓Vehicle markings – Oklahoma requires specific signage for hazmat carriers.

Study Tips

Study the Oklahoma CDL manual’s hazmat chapter thoroughly. Highlight section numbers that cover placarding and shipping papers – those questions appear most often on the state test.

Take our practice test multiple times. Review the explanations for every question you miss. The real exam won’t let you skip questions, so get comfortable with all 30 topics.

Visit the Oklahoma DMV website for the latest fees and appointment rules. You can’t take the hazmat test without a valid CDL learner’s permit. Plan ahead.

Oklahoma Specific Information

You take the hazmat knowledge test at any Oklahoma DMV location that offers CDL services. Major cities include Oklahoma City, Tulsa, Lawton, and Enid. You don’t need an appointment for the knowledge test, but bring your CDL permit and pay the $15 fee.

If you fail the hazmat test, you can retake it the next business day. No waiting period. The test has 30 questions, and you need 24 correct (80%) to pass.

After passing, you’ll receive a temporary endorsement. Your permanent card arrives by mail in about 10 days. Remember – you must also pass a TSA threat assessment before the DMV issues the endorsement.

Frequently Asked Questions

How many questions are on the Oklahoma hazmat test?
It’s 30 questions. You need an 80% to pass – that’s 24 correct.
Do I need a TSA background check before the Oklahoma hazmat test?
Yes. Apply for the TSA threat assessment first. You can’t get the endorsement without it.
Can I take the hazmat test at any Oklahoma DMV?
Only locations that offer CDL tests. Check the DPS website for a list. Most major cities have one.
What happens if I fail the Oklahoma hazmat test?
You can retake it the next business day. No waiting period, but you pay the $15 test fee again.
Does Oklahoma have special hazmat routing restrictions?
Yes. Some highways restrict hazmat loads, especially near schools and hospitals. Check Oklahoma’s routing map before you drive.
JM

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026 · FMCSA-compliant content