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Texas Tanker Vehicles Test

You'll haul milk, fuel, or water across I-35 – our practice test preps you for that specific reality.

Questions

80%

To Pass

Minutes

70 questions · 25 min time limit · 80% to pass

Opens in a practice window — choose your mode inside.

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

Last verified: August 2026

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

About the Texas Tanker Vehicles Test

You drive a tanker in Texas – that means hauling crude from Permian Basin wells or delivering milk to Houston dairies. Liquid loads don't act like solid freight. A sudden stop on I-35 near Austin can send 10,000 gallons slamming forward. You need to know surge, baffles, and off-tracking specific to our roads.

Texas heat plays a role. Asphalt softens on I-10 near El Paso, making blowouts more likely. Our practice test covers how thermal expansion affects liquid cargo and tire pressure. You'll also learn how to handle high winds on the Panhandle's flat stretches.

Every question reflects Texas DMV standards. We don't waste your time with generic theory. Expect scenarios about loading at a chemical plant in Corpus Christi or navigating the sharp curves near the Hill Country. Pass this test, and you'll walk into any Texas DPS office ready.

Our questions update when the Texas Commercial Driver Handbook changes. You get the same format as the real exam: 20 questions, 80% passing score, no second guesses. Start now and save yourself a retest fee.

Topics Covered

✓Surge and liquid movement – learn why a half-full tanker is more dangerous than a full one on Texas farm-to-market roads

✓Baffle types and their limits – not all baffles stop surge equally on I-45's stop-and-go traffic

✓Off-tracking on curves – crucial for tight turns near Port of Houston dockyards

✓Loading and unloading safety – static electricity risks when you pump diesel in dry West Texas air

✓Braking with a high center of gravity – how to avoid rollovers on US-83's sudden dips

✓Emergency procedures – what to do if a brine tanker springs a leak near a Edwards Aquifer recharge zone

Study Tips

Read the Texas Commercial Motor Vehicle Drivers Handbook – chapter on tanker endorsement. Focus on the section about surge dynamics and baffle ratings. Don't skip the figures; they show how liquid moves inside different tank designs.

Take our practice test three times. First time, answer without notes. Second time, review your wrong answers in the handbook. Third time, aim for 100%. Texas DPS gives you 20 questions – you can only miss 4. One mistake on surge or high-center-of-gravity braking ends your day.

Visit a DPS office before test day. Ask about walk-in availability (some locations like Austin-North are appointment-only). Bring your medical certificate and proof of Texas residency. No appointment? You'll wait – but many offices accept walk-ins on Tuesday mornings.

Texas Specific Information

The Texas DPS handles all CDL testing. You must schedule appointments at most offices – check the DPS website for your county. Appointments for the knowledge test (including Tanker endorsement) are usually available within 2-3 weeks. Walk-ins work at smaller offices like those in Kerrville or College Station, but expect 2+ hour waits.

Fees: The Tanker endorsement costs $10 – you pay this when you pass all tests. If you don't have a CDL yet, you'll pay the base CDL fee ($61) plus endorsement fees. Everyone must pass a vision test and provide a valid DOT medical card. No medical card = no test.

Testing locations: Major hubs include Houston (Gessner), Dallas (Northwest Highway), San Antonio (Southeast), and Austin (North Lamar). Bring your learner's permit (CLP) and at least one proof of Texas residency – a utility bill works. The knowledge test is computer-based, touch-screen, and you get instant results.

Frequently Asked Questions

Do I need a separate test for a tanker endorsement in Texas?

Yes. The Tanker Vehicles test is a separate knowledge exam. You take it after you pass the General Knowledge test. Score 80% or higher and the endorsement goes on your CDL.

Can I use my farm tanker experience to skip the test?

No. Even if you haul water or diesel on your ranch every day, Texas DPS makes everyone pass the written test. No waiver exists for tanker endorsements.

How long is the Texas tanker test?

20 multiple-choice questions. You get 25 minutes. Most people finish in 15 minutes. Take your time – each question is worth 5 points.

What happens if I fail the tanker test in Texas?

You retake it the same day if time allows, or schedule another appointment. Retest fee is the same as the original endorsement fee ($10). No limit on attempts, but you must pass within 90 days of your CLP issue date.

Does the Texas tanker test cover hazmat?

No. The Tanker test only covers liquid cargo handling. Hazmat is a separate endorsement. But if you haul gasoline or chemicals, you'll need both.

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

Last verified: August 2026 · FMCSA-compliant content