I took the OAR Today and got a 55. Thanks to all the great info and study material here. I also took the practice test in the Trivium OAR guide.
Math
I studied for this the most. At one point I was very good at Math but I haven't taken a math course in 8 years. It could just be in my head but It felt like whenever I was totally lost and guessed the difficulty would reset. I would get super easy questions and then the questions would get harder again. I only answered 18 questions. No surprises here. Everything I saw was in the gouges I found on here. My first question was reducing a radical. Lots of DRT problems, conversions, and ratios. Roughly 14 out of my 18 questions were word problems. One thing that helped is I pulled the numbers out of the problem right away on my scrap paper. My last question was a basic function question. If you have taken college algebra you'll be fine.
Reading comprehension
I never studied for this specifically but I did take a couple of practice tests. I killed the practice tests and thus devoted no time to prepare for it as I felt my time would be better spend on my weaker subjects. This was the most frustrating part of the test even though I felt the mechanical was my weakest section. I really struggled to find the right answer and decipher between the options. Which shocked me since I killed the practice tests. I didn't finish this section either. I think I got 21 questions. I was tallying them but they took my scrap paper.
Mechanical
I didn't get a single pulley question. Which is something everyone swore I would get a bunch of! I got a single gear problem which I also thought I would get a lot of. II never felt like I got difficult problems, I just had never seen some of the material before. They all seemed very basic. I studied the material in Kyles gouge, reviewed the trivium book and Prometrix book. I got two circuit questions and luckily I knew them just from being an AE. It's frustrating because I focused on pulleys and gears so much and didn't see them on the test. I had a question with a weight and friction that I just googled it turns out negative friction isn't even a thing! The other answers didn't make sense though. It was a question about weight and movement. This is the only section I actually completed, which is weird because It was definitely my weakest section. I imagine it's everyone's weakest section unless you were an engineering major. I had 15 minutes and finished with 4 minutes on the clock. I'm lucky I'm an AE and we learn about circuits, airfoils, and am generally mechanically inclined.
I felt doomed as I was taking the test. I really did not expect to break the halfway mark. I kept telling myself to finish and pray for a 45 (minimum for 1520). I graduated from school in December and didn't have a lot of time to study.