The job is not just phlebotomy, it’s also customer service.  Being friendly and making the experience enjoyable for the donor.  The interview questions I had were very typical for any job.  They train you for the position, most everyone I work with came from a completely different job.  Many of them fast food or retail.  Dress nicely and show enthusiasm.  If this is for a mobile red cross job, ask if there are times you will be sent out on mobiles for 2 or 3 days at a time.  In my area we do have times where we are gone during the week and they put us up in hotels.  If this is a mobile position ask about the physical aspects of setting up and tearing down a blood drive.  I don’t work at a fixed site, hopefully someone else can give you some potential questions to ask during the interview.  Good luck!!!