About NBII Exam Prep
An independent practice platform for the National Board Inservice Inspector Commission (NBII) exam - real questions across every exam domain, each with a plain-language explanation.
What's on the NBII exam
The National Board Inservice Inspector Commission (NBII) exam is organized into 9 knowledge domains. Here is what it covers:
- Inservice Inspection
- Boiler and Pressure Vessel Types and Terminology
- Conditions Causing Deterioration or Failures
- Installation
- Code Calculations
- Nondestructive Examination
- Pressure Testing
- Pressure Relief Devices
- Controls and Safety Devices
Every practice question on this site is organized across these 9 domains, so your study tracks the real exam structure instead of guesswork. As you answer, the per-domain analytics surface the areas still costing you points, so your review goes where it moves your score.
What we believe good exam prep looks like
Realistic practice beats passive reading. Every question is written to mirror the style and difficulty of the real exam, with a clear explanation of why the right answer is right and the others aren't.
Your weak spots should find you. Domain analytics, mistake review, and re-drilling are built in, so study time goes where it moves your score.
Pricing should be simple. One payment for a fixed access window matched to your exam date. No subscription, no auto-renewal, and 10 free questions to try before you spend anything.
Get in touch
Questions, feedback, or something not working? Email support@boardmentor.study - candidate messages are read and answered.