Oklahoma Tanker Vehicles Test

About the Oklahoma Tanker Vehicles Test

Oklahoma's highways carry more tanker traffic than you'd think. I-40 moves crude oil from the western plains east to refineries. I-35 hauls milk from dairy farms near Ardmore. US-69 brings propane to towns across the state. You need to handle those loads safely, especially when a thunderstorm rolls in off the Red River.

That's where this practice test comes in. It covers the exact topics from the Oklahoma CDL manual. You'll learn about surge control, braking on curves, and how to avoid rollovers. We focus on the conditions you'll face here: high crosswinds on the Turner Turnpike, heavy traffic in Oklahoma City, and the long, straight stretches near the panhandle.

Each question includes a detailed explanation. Read it. If you get something wrong, you'll know why. You can retake the test as often as you want. No sign-up, no charge. We want you to pass the DMV written exam fast.

Oklahoma's tanker endorsement requires a separate written test. You must score 80% to pass. That's 16 out of 20 questions right. Don't let a few missed questions delay your CDL. Use this practice test to build confidence before you walk into the DPS office.

What This Test Covers

• Braking and stopping distance – Oklahoma's long flat highways demand extra caution when your tanker is full.
• Liquid surge – understand how shifting liquid affects stability on I-35 near the Arbuckle Mountains.
• Loading and unloading procedures – avoid spills at Oklahoma's oil terminals or farm co-ops.
• Vehicle inspection – check your tanker for leaks before hitting the road on US-412.
• Speed and curves – reduce speed before curves on Oklahoma's two-lane highways to prevent rollovers.
• Emergency procedures – what to do if your tanker overturns on I-44 near Tulsa.

Study Tips

Study the Oklahoma CDL manual's tanker section first. Read it twice. Then take this practice test. Write down the questions you miss and review those pages again. Don't just memorize answers – understand why the right answer works.

When you visit the DPS, bring your medical examiner's certificate and proof of identity. Schedule your written test appointment online at a DPS office in Oklahoma City, Tulsa, or Lawton. Walk-ins often wait hours. The tanker endorsement fee is about $5, payable with cash or card. Pass the written test, and you're ready for the skills exam.

Oklahoma DMV Information

Oklahoma DPS handles all CDL written tests. You can take the tanker endorsement test at any DPS office that offers CDL services. Major locations include the Oklahoma City office at 4500 N. Lincoln Blvd., the Tulsa office at 6920 S. 69th East Ave., and the Lawton office at 2610 N.W. 82nd St. Call ahead to confirm hours – they change.

You don't need an appointment for the written test, but we recommend scheduling one online to avoid long lines. If you prefer, third-party testers like CDL Testing Solutions also offer the tanker endorsement test. Their fee runs higher. Either way, you'll need a valid Oklahoma CDL permit or license before you attempt the endorsement test.

After you pass, the endorsement appears on your license. It's valid for the same period as your CDL. Renew on time, or you'll have to retest. Remember: tanker endorsements no longer expire five years from issuance like they used to – they now match your CDL renewal cycle.

Frequently Asked Questions

Related Resources

Other Oklahoma CDL Practice Tests

Test Details

• State: Oklahoma
• Test: Tanker Vehicles Test
• Questions: 70
• Passing Score: 80%
• Time Limit: 25 minutes
• Cost: Free

Need ELDT Training?

If you're getting your first CDL, you need ELDT theory training before your skills test.