Illinois Tanker Vehicles Test
Chicago's I-55 has a 15 mph curve right near the Stevenson; you'll need a tanker endorsement to haul fuel through it safely.
Select Test Mode
About the Illinois Tanker Vehicles Test
Illinois tanker drivers face unique challenges. Our long winters mean icy on-ramps near Joliet, and summer storms flood low spots on I-57 near Kankakee. You can't brake hard with a partial load—slosh is real.
The Illinois DMV tests your knowledge of liquid surge, baffle design, and how to handle high centers of gravity. You'll also need to know when to slow down on curves like the Des Plaines River bridge on I-294. That's not in the general CDL book.
This practice test uses real-world Illinois scenarios. You won't find generic 'highway' questions. Instead you'll get questions about grain alcohol tankers on I-74 near Champaign or milk tankers on I-88 near Dixon. Each answer helps you pass the actual written test.
We keep it lean—20 questions, 80% to pass, 25 minutes. No fluff. Take it once, take it twice. You'll know exactly what the Illinois DMV expects.
What This Test Covers
- Liquid surge control – critical on I-55's sweeping curves near Springfield
- Braking with partial loads – a must for Illinois grain haulers on rural two-lanes
- Baffle and non-baffled tanker differences – relevant for Chicago terminal deliveries
- Rollover prevention – especially on I-90/94 merge near the Kennedy Expressway
- Loading and unloading procedures – common at Illinois ethanol plants in the central region
- Emergency action plans – required when hauling flammable liquids through Illinois tunnels
Study Tips
Read the Illinois Commercial Driver’s License Manual, specifically Section 6 on Tank Vehicles. The DMV pulls questions straight from it. Don't skip the diagrams—they show surge dynamics you'll see on the test.
Practice with our test until you score 90% or higher three times in a row. The real Illinois exam has no trick questions, but word choice matters. Watch for 'must' vs. 'should.' Focus on the 'must' answers.
Take a notebook. Write down every Illinois-specific rule you find—like the ban on texting while driving near school zones even in a commercial vehicle. Not in the manual? It's the law here.
Illinois DMV Information
Illinois offers the Tanker endorsement test at all DMV facilities that handle CDL skills tests. You'll find them in Chicago (West Annex), Springfield, Peoria, and Rockford. Appointments are required for the written test at most locations—check the Illinois DMV website to book. Walk-ins are sometimes accepted but expect longer waits.
The test fee for the tanker endorsement is $6 for the written knowledge test, plus $30 for the endorsement if you already hold a CDL. Pay with cash or card at the counter. You'll need to show your current CDL and pass vision screening before starting. No additional medical forms needed.
Bring your own pen and a photo ID. Plan for 30-45 minutes at the DMV. The test itself takes about 25 minutes, but check-in adds time. Some locations like Chicago West Annex have digital kiosks that speed things up.
Frequently Asked Questions
Related Resources
Other Illinois CDL Practice Tests
Test Details
- State: Illinois
- 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.
Start Free ELDT TrainingQuick Topics
- Surge & braking on icy Illinois roads
- Baffles vs. non-baffled tanks
- Rollover risks on curves