Even though I didn’t pass the test with the score I wanted, I do think I almost studied too in-depth into the material. I feared the test would have a lot of math and nuclear physics but it didn’t have very much of that material. The few math conversions and nuclear physic questions were all pretty basic.
The NRPP exam I took was more on basic statistics and on EPA consumer focused testing, then it was on service testing providers. Focus mostly on statistics like smoker vs. nonsmoker, pros vs cons of different measurement devices. I would say I got a ton of knowledge from InterNachi’s Radon Measurement Course that will help me in the future, but to do well on the exam look more so at basic EPA radon publications.