CDL Tank Vehicles (N) practice test

Surge, baffles, bulkheads and the handling problems of a high centre of gravity. 20 questions, every answer explained. Free, no signup.

Drawn from a bank of 50 questions, weighted across every knowledge area. The selection changes daily, though on a subject this narrow you will see some questions again.

What this test covers

Federal law prescribes the knowledge areas a CDL applicant must be tested on. This bank is organized by them, and each practice test draws proportionally across all of them rather than sampling at random.

Common questions

How many questions are on the real Tank Vehicles (N) test?

Test length is set by your state within the federal framework, so it varies — commonly around 50 for General Knowledge. What doesn't vary is the passing score: 80%, federally, everywhere. Confirm the question count with your state licensing agency.

Who has to take the Tank Vehicles (N) test?

Drivers hauling liquid or gas in bulk.

Can I retake it if I fail?

Most states allow retakes, often after a short waiting period. Check with your state licensing agency.

Are these the real test questions?

No. The federal question pool isn't public, states develop their own wording from it, and versions rotate. These are original questions covering the same federally required knowledge areas — which is what the real test is built from too.

When you want an exam that changes every time

This test rotates once a day, so everyone sees the same set until midnight. The full CDL simulated exam draws a fresh 50-question exam on demand, and the missed-question drill pulls your wrong answers from every CDL test into one place. One payment of $29 covers both, plus every state's car-permit exam.

The rest of the battery

A CDL is several tests, not one. See the full battery and which ones apply to you.