In all seriousness, the ora is part of your PV/SV day. During the SV (systems validation) your instructor is going to ask you a few questions about each system of the aircraft. If you get the questions right, you move on. If you get them wrong, he/she can dig further, or set the question aside until the end where they go back to it and ensure you understand the material in question. They will also ask you questions from FM1, and the walk around video. I caution you though, don't think that you can miss a bunch of questions and just cover them at the end. This is a timed exam, and if you get to the two hour mark and you're still talking, then you will get and unsat and have to make up the rest.