Not affiliated with any state DMV or AAMVA. Original questions based on the Texas Commercial Motor Vehicle Drivers Handbook (DL-7C, revised March 2026).
CDL tank vehicles test: practice test with original questions from a state CDL handbook
Practice for the CDL tank vehicle (N) endorsement knowledge test with 39 original questions written from a state CDL handbook based on the national model manual (Texas DL-7C, revised March 2026), in English and Spanish.
39 questions · Modes: Study, Topic drill, Daily 5
About this test
Practice for the CDL tank vehicle (N) endorsement knowledge test with original questions written from the matching section of the Texas Commercial Motor Vehicle Drivers Handbook (DL-7C, revised March 2026), which follows the national AAMVA model CDL manual used by most states. Every correct answer is backed by a passage of the handbook and checked by two independent verifiers.
- Study: every question with a short explanation.
- Topic drills: inspecting tank vehicles, driving tank vehicles, safe driving rules and surge.
- Mock test: not offered, because the handbook states the 80% pass mark but not the number of questions.
The questions are written in our own words in English and Spanish; this is not any state's question bank. The CDL general knowledge test and other endorsements are separate pages.
Topics
- Baffled tanks · 1
- Braking early · 1
- Bulkheads · 1
- Class C tank endorsement · 1
- Cleanup liability · 1
- Controlling surge · 1
- Curves · 1
- Drive smoothly · 1
- Emergency equipment · 1
- Empty tanks · 1
- Heavy liquids · 1
- High center of gravity · 1
- Inspection purpose · 1
- Jackknife · 1
- Leaking tank · 1
- Leaks · 1
- Liquid surge · 1
- Manhole covers and vents · 1
- Open valves · 1
- Operator manual · 1
- Outage · 1
- Outage requirement · 1
- Pipes and hoses · 1
- Quick stop · 1
- Ramp speeds · 1
- Rollover risk · 1
- Side-to-side surge · 1
- Skids · 1
- Smooth bore cargo · 1
- Smooth bore driving · 1
- Steering while braking · 1
- Surge on slippery surfaces · 1
- Tank body and pipes · 1
- Tank endorsement · 1
- Tank endorsement capacity · 1
- Un-baffled tanks · 1
- Valves · 1
- Vents · 1
- Wet roads · 1
Sources and version
- Texas Commercial Motor Vehicle Drivers Handbook (DL-7C)Covers: Revised March 2026
Covers: Texas DL-7C, revised March 2026 · Verified current as of Oct 28, 2026
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How this page was made
Written by AI from the sources listed above, checked automatically, not reviewed by a person. Where the source licence allows it the questions keep the source wording; otherwise they are original questions based on the source. Every answer shows its source. This is not legal, immigration, medical or financial advice.