Get your Tank endorsement done — federally compliant, finished in days.
An 8-chapter ELDT theory course built to FMCSA Appendix F. Surge physics, tank specs, pre-trip, loading, and emergency response — the real material the knowledge test is built on. When you finish, we submit your completion to the Training Provider Registry within two business days so you can sit for the state knowledge test.
Three reasons CDL holders take this course.
If you're adding the N endorsement to your CDL — whether the cargo is fuel, food-grade, or industrial chemicals — this course gets you compliant fast and gives you a real understanding of liquid load physics, not just enough to pass a test.
Driver assigned to a tanker route
Your fleet just put you on a fuel, water, or chemical route. You need the N endorsement before your next assignment, and you need to actually understand how a 5,000-gallon load behaves on a curve — not just memorize answers.
Milk, juice, or food-grade hauler
Smooth-bore tanks haul different than baffled tanks — and the difference matters every time you take a curve. This course covers why food-grade transport uses smooth-bore, and how to drive it safely.
Owner-operator chasing tanker rates
Tanker freight pays better than dry van. If you're running your own authority and want access to the higher-paying liquid loads — petroleum, chemicals, food-grade — the N endorsement is the entry ticket.
8 chapters. Every FMCSA Appendix F topic covered.
This is theory training, not behind-the-wheel — that's what FMCSA requires for the N endorsement. Each chapter is built on primary sources: 49 CFR Parts 380 & 383, the federal CDL Manual, and current industry practice.
Introduction to Tank Vehicles & the N Endorsement
The 119-gallon and 1,000-gallon capacity thresholds. CLP vs. CDL, the X restriction, and the difference between the X restriction and the X endorsement.
Types of Tank Vehicles & Equipment
DOT/MC tank specs (306/406, 307/407, 312/412, 331, 338). Baffled vs. smooth-bore vs. bulkhead. Valves, vents, vapor recovery, grounding and bonding.
Pre-Trip Inspection of Tank Vehicles
Why leaks are the #1 priority. Out-of-service conditions, the DVIR, and what to do when you're handed an unfamiliar vehicle.
Physics of Liquid Transport: Surge, COG & Stability
How surge actually behaves. Why posted curve speeds may be too fast for loaded tankers. Why partial loads can be more dangerous than full loads.
Loading, Outage & Weight Management
The three load factors, federal weight limits (80,000 lb GVW, single and tandem axles, Bridge Formula), thermal expansion, and grounding/bonding procedures.
Safe Driving Techniques for Tank Vehicles
Curve speed, following distance, smooth braking and acceleration, mountain driving, slippery conditions, and the techniques that defeat surge.
Emergency Procedures & Accident Response
Spill response, fire response (including BLEVE risk on pressurized tanks), rollover procedures, evacuation distances, and who to call.
Regulations & Compliance + Course Review
49 CFR Parts 380 and 383, state-by-state variations, ELDT compliance confirmation, scenario-based review, and final TPR submission readiness.
A complete ELDT package — not just a quiz.
This isn't a $25 watch-and-click course. It's a full ELDT theory package with the depth of a $300 program — at a price that respects your time and your wallet.
8-chapter ELDT theory course
Every Appendix F topic covered, organized for retention — not just compliance. Self-paced. Finish in a day, or take a week.
FMCSA TPR submission
Within two business days of your completion, we submit your record to the FMCSA Training Provider Registry. Then you're cleared for the state knowledge test.
Direct instructor support
Stuck on a topic — or wondering whether your fleet's actually loaded that bulkhead trailer right? Email me. You're not a ticket number here.
Lifetime course access
Your access doesn't expire. Refresh on outage rules a year from now, or pull up the surge physics chapter the night before your first big haul.
Built to current 2026 regulations
49 CFR Parts 380 & 383 are the foundation. Course content reflects regulations as they stand in 2026 — not a 5-year-old PowerPoint someone keeps re-uploading.
Companion study guide available
The Tank Endorsement ELDT Study Guide (paperback, Amazon) is built directly from this course material — 9 chapters, 152 practice questions across three full-length exams. Optional, but most students get it.
This isn't a course built by a tech company.
Terence Mullins
I spent 10 years as an OTR driver before founding ELDT.Courses. Tank work isn't an abstract topic for me — surge on a wet off-ramp, the difference between a 306 and a 331 in a fire, the moment you realize a partially-filled smooth-bore is going to push you somewhere you didn't plan to go. That's stuff I learned the way every working driver does, by living it.
This course is the curriculum I wish I'd had when I was first adding endorsements. Every chapter is built on primary sources — 49 CFR Parts 380 and 383, the federal CDL Manual, and 30+ years of industry practice — not on someone else's training summary. The companion Tank Endorsement ELDT Study Guide is the same content reorganized for offline study and full-length practice exams.
If you're going to spend money on N endorsement training, it should at least be money spent with an instructor who's done the work. That's what you get here.
- 10 years over-the-road CDL Class A driver — long-haul, regional, tanker
- FMCSA-Registered Training Provider — ELDT compliance for state CDL endorsements
- Author — Mastering Split Logging, available on Amazon
- Author — Tank Endorsement ELDT Study Guide, available on Amazon
- Founder, ELDT.Courses — FMCSA-registered training provider
What students ask before enrolling.
How long does the course take to complete?
Plan on roughly 6 hours of focused work, often spread over 2–3 sittings. There is no minimum hour requirement — FMCSA requires 100% topic completion, not seat time — so you can move faster if you push, or slower if you'd rather absorb it. Tank material rewards spaced study; the surge physics in particular benefits from sleeping on it.
When does the N endorsement actually apply?
Federal law (49 CFR 383.5) defines a tank vehicle by capacity. The N applies when both thresholds are met: any individual tank with rated capacity over 119 gallons, AND aggregate capacity over 1,000 gallons across all tanks on the vehicle. Cargo type doesn't matter for Class A and B drivers — water and gasoline are treated alike. Class C drivers need the N only for hazardous materials in qualifying tanks.
What's the difference between the X restriction and the X endorsement?
Same letter, completely different meaning. The X restriction is automatically applied to a CLP that has the N endorsement — it prohibits any cargo in the tank during the CLP phase. The X endorsement on a full CDL is the combined Tank + HazMat credential, indicating the driver has passed both knowledge tests. Chapter 1 covers this distinction in detail because it shows up on the test and gets confused constantly.
When can I take the state knowledge test?
As soon as your completion is submitted to the FMCSA Training Provider Registry. We submit completions within two business days. Once it's in the TPR, your state DMV can verify your ELDT compliance and let you sit for the N endorsement knowledge test.
Is this course FMCSA-compliant for the N endorsement?
Yes. ELDT.Courses is a registered Training Provider in the FMCSA Training Provider Registry. The course is built to 49 CFR Part 380, Subpart F, Appendix F — the federal specification for Tank Vehicle ELDT theory training. Completing this course satisfies the federal training requirement for the N endorsement.
Does this course include behind-the-wheel training?
No. By regulation, Tank ELDT is theory-only — there is no separate behind-the-wheel ELDT requirement for the N endorsement. After your completion is submitted to the TPR, your next step is the state knowledge test.
Do I need a CDL before I can take this course?
No — but you will need a valid CDL (or CLP) before your state will issue the N endorsement. Many students take this course alongside their initial CDL training. If you already have a CDL and are adding the endorsement, you're good to go immediately.
What's the passing score?
Course quizzes use the FMCSA standard 80% passing threshold. You can retake any quiz as many times as you need. The state knowledge test is administered by your state's licensing agency and uses their own scoring rules — usually also 80%.
Is the companion paperback book required?
No. The book is an optional companion — same author, same content, organized for offline study with three full-length practice exams (152 total questions). The course alone will get you compliant and prepared for the state knowledge test. Most students who get the book use it for night-before-the-test review.
What's your refund policy?
A 7-day refund is available if you haven't started the course content. Once you begin working through the modules, the course is yours for life — including all future updates. The exception: if your completion has already been submitted to the TPR, the federal record exists and the refund window closes. Full terms are in our Terms of Service.
Get your Tank endorsement done. The right way.
8 chapters. Built to FMCSA Appendix F. Submitted to the TPR within two business days. Lifetime access. Real instructor support.
It's all in there. The only thing missing is you.