CDL TANK Study Guide 2026
Everything you need to pass the CDL TANK exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
CDL TANK exam key facts
📋 CDL TANK Exam Format at a Glance
📚 CDL TANK Topics to Study (6)
✍️ Sample CDL TANK Questions & Answers
1. A DOT-specification cargo tank must have an external visual inspection and leakage test at least how often?
Under 49 CFR 180.407, DOT-specification cargo tanks need an external visual inspection and leakage test at least once each year. The longer 5-year interval applies to pressure retests, not to these checks.
2. Compared with a smooth bore tank, what is the main handling advantage of a baffled tank?
Baffles have holes that slow liquid moving through the tank. This reduces front-to-back surge compared with a smooth bore tank.
3. A baffled tank still has what remaining surge concern?
Baffles slow forward-and-back movement, but liquid can still move side to side. That sideways movement can contribute to rollovers.
4. Compared with the same truck carrying a full load, an empty tank truck generally:
Empty trucks take longer to stop than loaded ones because a lighter vehicle has less traction. Brakes designed for heavy loads can lock up or skid more easily when the truck is empty.
5. Why does a smooth bore tank call for especially gentle braking and acceleration?
With no internal barriers, the liquid moves freely and its momentum can push the truck forward or back.
6. A tank vehicle is carrying a partially filled load. What is "liquid surge"?
Liquid surge is the movement of liquid in a partly filled tank, forward and backward or side to side. It happens when the vehicle accelerates, brakes, or turns.
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How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- dps.texas.gov — Eligibility · verified Nov 2026
- ecfr.gov — Eligibility, exam format, passing score · verified Nov 2026