I would assume the nurse manager will ask you about your interest to that specific unit...and if you haven't already been asked, your weaknesses, strengths, "describe a situation...." type of questions. Even when I was asked those questions the first interview, the second interview still contained the same questions especially if its a different person doing it. Just prepare yourself as if its the first interview. Otherwise, it might be a "getting to know you" type of meeting as well. Good luck!!!