| 90-100 | => | 25% |
| 80-89 | => | 25% |
| 70-79 | => | 25% |
| 60-69 | => | 25% |
| <60% | => | 0% |
In Idaho, tanker drivers must hold a valid Class A or Class B CDL (Commercial Driver’s License) with a Tank Vehicles (N) endorsement issued by the Department of Motor Vehicles (DMV). This endorsement allows you to drive commercial vehicles designed to transport liquid or gaseous materials in one or more tanks, with each tank having an individual rated capacity of more than 119 gallons and an aggregate rated capacity of 1,000 gallons or more.
The licensing process requires all applicants to pass the official Tank Vehicles Knowledge Exam and meet several other requirements. This test will evaluate your understanding of liquid surge, emergency procedures, and pre-trip inspections specific to tanker vehicles. The official Commercial Driver’s License Manual (Idaho CDL Handbook 2026) describes this subject in detail. We recommend reading it multiple times during your learning phase, especially Section 8 (Tank Vehicles).
Our Idaho CDL Tanker Vehicles Practice Tests are designed to help you pass on the first attempt. You can train with them as often as your schedule allows. They are available 24/7, so you can access them anytime, anywhere in the world. All you need is a compatible device and a stable internet connection. The practice test that you’re about to take is the second in this series. Its content and format closely mirror the official Tank Vehicles Knowledge Exam. Use it to strengthen your knowledge and build confidence before exam day.
“Officer Frank” will be present during your training sessions. This AI coach can explain why a specific answer is correct. He can also tell you how certain rules apply in real-world tanker operations and provide personalized answers to your individual questions. Initiate a conversation with “Officer Frank” whenever you get stuck on a difficult question, and he will provide the hints you need to figure out the correct answer on your own.
Check out our Free Idaho CDL Permit Practice Test and use it alongside the official commercial driver’s license manual. This intuitive tool makes general commercial driving theory easier to understand. Train with it for several weeks to build a strong foundation for your tanker driving career.
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