Free CDL Tank Vehicles Practice Test
The Tanker endorsement test covers Section 8 of the CDL manual: liquid surge, baffled and unbaffled tanks, outage, high center of gravity, braking and curves with a tank, and which tanks need the N endorsement.
20 Tank Vehicles questions with three answer choices, scored at the real 80% pass mark (16 correct), with an explanation from the CDL manual for every answer.
Or start with a free Tank Vehicles drillYou are bringing a partially loaded tanker to a stop. How should you use the brakes to control surge?
CDL Tank Vehicles test at a glance
- Who takes it
- Drivers of tanks with an individual rated capacity over 119 gallons and 1,000 gallons or more in total.
- Passing score
- 80%
- Answer choices
- 3 per question
- Endorsement code
- N
Your state sets the number of questions from the federal question pool. Our full Tank Vehicles practice test has 20 questions, so you need 16 correct to reach 80%. 38 original Tank Vehicles questions rotate through it, so a second try is a different test.
What’s on the Tank Vehicles test
The test comes from Section 8 of the CDL manual. Our questions cover it in 2 topics, and your practice score report shows how you did in each one.
- Tank endorsement rules and inspection17 practice questions
- Driving tank vehicles21 practice questions
Take the full Tank Vehicles test
20 Tank Vehicles questions with three answer choices, scored at the real 80% pass mark (16 correct), with an explanation from the CDL manual for every answer.
Or start with a free Tank Vehicles drillFree Tank Vehicles practice drills
Ten questions with the explanation after each answer. Create a free account to save your results; each drill’s first attempt is free.
CDL Tank Vehicles questions
Can I drive a tanker on a CDL permit?
A CLP can carry the N endorsement once you pass the Tank Vehicles test, but a CLP holder may only drive an empty tank, purged of any hazardous material residue (49 CFR 383.25).
What is the X endorsement?
X combines tank vehicles (N) and hazardous materials (H). You get it by passing both the Tank Vehicles and the Hazardous Materials tests.
Ready for the DMV?
20 Tank Vehicles questions with three answer choices, scored at the real 80% pass mark (16 correct), with an explanation from the CDL manual for every answer.
Or start with a free Tank Vehicles drillOther CDL practice tests
Questions are written from Section 8 of the model CDL manual; rules from the federal regulations, checked October 2026: Texas Commercial Motor Vehicle Drivers Handbook (DL-7C, AAMVA model CDL manual, revised March 2026) · 49 CFR 383.25 Commercial learner’s permit · 49 CFR 383.71 Driver application and certification procedures · 49 CFR 383.91 Commercial motor vehicle groups · 49 CFR 383.93 Endorsements · 49 CFR 383.133 Test methods · 49 CFR 383.135 Passing knowledge and skills tests · TSA Hazmat Endorsement Threat Assessment Program.
Original independent practice. Not affiliated with or endorsed by FMCSA, AAMVA or any state licensing agency.