So I've been lurking here for a while and finally made an account because I want to share what actually worked after two failed attempts. I took the OSU certification exam back in February and March, both times scoring just below passing — like 68% when I needed a 70. I was using random YouTube videos and my old textbook and honestly just winging it.
What changed everything was actually sitting down with a structured OSU study guide and being honest about which domains I was weak in. For me it was the operational safety and equipment calibration sections. I also started doing timed OSU practice test runs every single day for two weeks straight, which forced me to get comfortable with the question format and stop second-guessing myself.
Third attempt I scored 79%. If you're stuck, stop rereading notes and start doing practice questions under real conditions. Happy to share more exam tips if anyone's prepping right now — just drop your questions below.