CDL (Commercial Driver)
CDL Tank Vehicles (N) Practice Test 9
Free — no payment neededLevel: Mixed
20 original CDL Tank Vehicles (N) questions based on the federal motor carrier safety rules (49 CFR). Practice test, not affiliated with any government agency.
Created by AI
Practice test, not affiliated with any government agency. Original questions written from public sources, checked by a second AI reviewer and automated checks. Rules change; confirm with the official handbook. Available in 2 languages (translations are machine-made and checked automatically).
Before you start
- Questions
- 20 multiple-choice questions, one at a time
- Time
- About 12 minutes. Untimed — take as long as you need.
- Pass mark
- 16 out of 20 correct (80%)
- Feedback
- Your score, the correct answers and short explanations when you finish
- Account
- Not needed. Your answers stay in this browser.
What this test covers
Tank safety rulesDriving tank vehiclesTank inspectionSurge and baffles
Preview the first question
At what height must a front end structure extend if no cargo would be blocked sooner?
- 2 feet above the floor
- 8 feet above the floor
- 4 feet above the floor
- 6 feet above the floor
Answers are revealed on the results page after you finish.