Sure, to the extent that I don't compromise the exam process.
My oral exam was held at a nearby university, and was proctored by two local BCEEs. I had asked them for several months what to prepare for, and they, in turn, asked AAEES for guidance. The only guidance that came back was that there was no real way to prepare (unlike with the written exam, for which i understand there is a preparation guide book), and to just show up and answer as best I could.
The exam was a little more formal than I was expecting. They showed up with prepared question sets for the specialty that I was applying for (water supply and wastewater). There were two question sets for me. Each one was focused on a specific and specialized subject within my industry. They were not necessarily subjects that would have been taught in school (they were pretty narrowly focused), but definitely topics that you would know something about if you had been working in the industry for 12 or more years, or whatever the minimum is for the oral exam option. Once they read the basic description of the scenario or subject, then they would start asking the scripted questions, which were designed to provide for more of a discussion, definitely not problem solving type stuff. During my answers, they would ask clarifying questions and take lots of notes. I have no idea what the criteria is for passing or failing, maybe they told me, but I get the impression that it's a combination of your answers (they must have some guidance on what the correct range of answers could be) and the interviewer's judgment of whether or not you actually know what you're talking about.
Obviously I can't share with you what the topics or questions were, but I did see that they were pre-prepared, printed question sets, so obviously this is a pretty well organized system, and I can only guess that they have several question sets to choose from for each specialty. The two topics I was given happened to be ones that I had some personal experience with, so that was a relief, but one of them was on a subject that I had not personally, directly performed work, so I stated that to the proctors and tried my best anyway, which was adequate because I was at least familiar with the subject from the implementation side, if not the theory/standards side.
So I'd say just go in sharp and well rested, and you should do fine. Of course, if you're doing the written exam, I have no idea what to expect there. I think they provide a study guide for that.