Missouri Tanker Vehicles Test
If you're hauling liquid fertilizer down I-70 or fuel through downtown St. Louis, this test covers the surge and stopping challenges that are real on Missouri roads.
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Missouri's tanker test is 20 questions, 80% to pass. We'll get you ready for the surge, the braking, and the Missouri-specific stuff examiners love.
Key Topics
- •Liquid surge and how to control it
- •Braking and stopping with a shifting load
- •Loading, unloading, and baffle use
About the Missouri Tanker Vehicles Test
Topics Covered
- ✓Liquid surge control — Missouri's winding two-lane highways on US-60 make surge management critical when you're hauling corn syrup or oil
- ✓Braking with a shifting load — you need to know how a tanker's weight shift affects stopping distance on I-70's concrete stretches, especially in rain
- ✓Loading and unloading procedures — Missouri has strict rules for agricultural chemical tanks at co-ops in places like Moberly and Sikeston
- + 3 more topics
📘 Study Tips & State Info
Missouri examiners focus heavily on liquid surge. They know most tanker accidents in this state happen because a driver took a curve too fast on a rural highway and the load shifted. Study the 'surge wave' concept — when you brake, the liquid slams forward, then rebounds. That rebound can push you into a jackknife if you're not ready.
Another big one: brake adjustment. Missouri's weather means you'll drive in everything from 100°F August heat to ice storms in January. Know how temperature affects your brake system and how to check slack adjusters. The manual has a specific section on brake checks for tankers — memorize it.
Finally, get comfortable with the Missouri CDL manual's tanker chapter. It's only about 10 pages. Read it twice. Pay attention to the diagrams showing baffles and surge. If you can explain to yourself why a smooth bore tank is dangerous on I-70's curves, you'll pass.
Missouri's DMV handles all CDL written tests. You can take the tanker endorsement test at any participating DMV office. Major testing locations include the Kansas City South DMV (4310 E 50th Terrace), the St. Louis South County office (6920 S Lindbergh Blvd), and the Jefferson City main office (225 W High St). Appointments are recommended — walk-ins might wait hours.
You must bring your current CDL permit or license, your Social Security card, and a valid Medical Examiner's Certificate. The test fee is $6.25 for the endorsement (as of 2025). If you fail you can retake it the next business day — no waiting period in Missouri.
One Missouri-specific detail: the state requires tanker drivers hauling anhydrous ammonia to also pass a separate Missouri Department of Agriculture exam if you're applying for a farm-related CDL. That's not on our practice test, but it's good to know.
About the Missouri Tanker Vehicles Test
The Tanker Vehicles endorsement is required for any Missouri CDL holder who transports liquids or gases in bulk — think gasoline, milk, anhydrous ammonia, or water. You'll need this if your tanker has a capacity over 1,000 gallons. The test focuses on liquid surge, braking dynamics, and safe loading/unloading procedures.
Missouri's not flat either. You'll deal with the rolling hills of I-44 between Springfield and Rolla, the long downgrades near the Ozarks, and the freeze-thaw cycles that make winter hauling on I-70 a different beast. The Missouri DMV expects you to know how a partially filled tank behaves when you crest a hill or hit a patch of black ice.
This test is part of the written knowledge exam. You take it after passing General Knowledge. It's 20 multiple-choice questions, and you need 16 correct. The Missouri State Highway Patrol handles skills testing, but the written test is at any Missouri DMV office that offers CDL permits.
We built this practice test from the actual Missouri CDL manual and real examiner feedback. It's not generic federal stuff — it's what you'll see in Jefferson City, Kansas City, or Cape Girardeau.
Topics Covered
Study Tips
Missouri examiners focus heavily on liquid surge. They know most tanker accidents in this state happen because a driver took a curve too fast on a rural highway and the load shifted. Study the 'surge wave' concept — when you brake, the liquid slams forward, then rebounds. That rebound can push you into a jackknife if you're not ready.
Another big one: brake adjustment. Missouri's weather means you'll drive in everything from 100°F August heat to ice storms in January. Know how temperature affects your brake system and how to check slack adjusters. The manual has a specific section on brake checks for tankers — memorize it.
Finally, get comfortable with the Missouri CDL manual's tanker chapter. It's only about 10 pages. Read it twice. Pay attention to the diagrams showing baffles and surge. If you can explain to yourself why a smooth bore tank is dangerous on I-70's curves, you'll pass.
Missouri Specific Information
Missouri's DMV handles all CDL written tests. You can take the tanker endorsement test at any participating DMV office. Major testing locations include the Kansas City South DMV (4310 E 50th Terrace), the St. Louis South County office (6920 S Lindbergh Blvd), and the Jefferson City main office (225 W High St). Appointments are recommended — walk-ins might wait hours.
You must bring your current CDL permit or license, your Social Security card, and a valid Medical Examiner's Certificate. The test fee is $6.25 for the endorsement (as of 2025). If you fail you can retake it the next business day — no waiting period in Missouri.
One Missouri-specific detail: the state requires tanker drivers hauling anhydrous ammonia to also pass a separate Missouri Department of Agriculture exam if you're applying for a farm-related CDL. That's not on our practice test, but it's good to know.