IO Solutions/National Firefighter Selection Inventory (NFSI)

Firefighter Exam Preparation

Since 1950, Don McNea Fire School has successfully prepared over 60,000 applicants for firefighter examinations across the country.

IMPORTANT TEST NOTE:  95% of all examinations given by I/O Solutions are the IO/National Firefighter Selection Inventory (IO/NFSI)!

I/O Solutions National Firefighter Selection Inventory (IO/NFSI)
425-Question Custom-Designed Practice Test

Immediate Digital Download Available!

You will receive over 425 in-depth multiple choice custom-designed practice examination questions on ALL the following testing subjects for your IO Solutions (IOS)/National Firefighter Selection Inventory exam – THIS IS NOT GENERIC TESTING!

  • Verbal Comprehension
  • Verbal Expression
  • Problem Sensitivity
  • Deductive Reasoning
  • Inductive Reasoning
  • Information Ordering
  • Mathematical Reasoning (including step-by-step instructional for each question)
  • Number Facility

We will also include our in-depth questions for the Stress Tolerance, Team Orientation and Motivation/Attitude testing subjects.  The failure rate for this portion of your exam is 40-50%!

This will be the key to your examination – this is where the ballgame will be won!!!!! Almost 40% of your I/O Solutions/National Firefighter Selection Inventory Examination will deal with situations and questions about you that are trying to identify whether or not you have the key personality traits and behaviors of a successful firefighter.

You will not be able to find practice examinations on this section of your exam anywhere else.  Don't let this part of the examination keep you from becoming a firefighter!

What makes our exam preps unique is that each of our written practice tests is custom-designed to the test consultant who is giving your exam; these are not generic practice tests!

We specifically target the testing subjects for the test consultant, IO Solutions, that will be giving your exam. No one can match the custom-designed detail we put into our exam prep.



To dramatically increase your chances of finishing in the top percentile, we will include the download bonus material FREE with your purchase.  

  • Encyclopedia of Firefighter Examinations – Over 500 questions divided into 16 of the most common testing subjects used on exams around the country. Sold HERE normally for $29.95! 
  • Don McNea Fire School’s Firefighter Hiring Guide Notebook
    • Firefighter examination preparation strategies and our top-scoring test-taking and physical agility strategies.
    • Top-scoring oral interview strategies and sample questions.
    •'s fire department information sheets which allow you to keep track of phone numbers, addresses, test dates, special requirements, and other pertinent information you will need to prepare before the examination.
    • List of the top 150 major fire departments including their addresses and phone numbers so that you can keep track of the most current exam information.  

    Your Opportunity…

    Your investment in this IO Solutions/NFSI practice test will actually be returned to you in your first two hours as a firefighter! When considering the cost of this practice test, view it as an investment in your future and the future of your family.

    We have been preparing applicants since 1950; this is what our business specializes in. If you feel at this time that you are adequately prepared for this examination, we wish you the best of luck. If you want that extra edge over your competition that our custom-designed testing materials will provide, this prep package is for you! And, remember that luck goes to the prepared!

    If you are not completely satisfied, we will refund 100% of product cost - no questions asked! This website is run by Chief Officers and Firefighters that have done everything to make sure your purchase and privacy are secure. 

    PLEASE NOTE:  This exam prep is not associated with nor endorsed in any manner by I/O Solutions.

    Successful candidates who have used this custom-designed IO Solutions/NFSI Practice Test had this to say: