I don't think that's possible. You can be asked literally anything. My oral was 7.5 hours long.
That being said, I would make sure that I:
-knew AC 61-65E inside and out
-knew the aeronautical experience requirements for private, commercial and recreational pilots
-was very familiar with the airplane flying handbook and the pilots handbook of aeronautical knowledge
-had "tabbed" my FAR-AIM to help quickly find various subjects
-knew the POH of your aircraft inside and out
.....that's for starters. I walked into that checkride with, oh, somewhere around 15 different books that had various diagrams tabbed that would help me explain various concepts....that helped. The DPE (the FSDO has to be used now) told me that I could "teach ground to PhDs."
She didn't like my eight's on pylons, however.
One more thing.....don't ignore the various other advisory circulars....they're full of good info.