At the beginning you should make a introduction to yourself and your project, then they will give you some technical questions, finally you can ask them a few questions about the company.

Though the interviews themselves weren't too difficult the process was very grueling. I was put in a room for an entire day while 5 sets of interviewers (1-2 at a time) came in and grilled me. Some were technical interviews, one was behavioral, one was general critical thinking. The plant visit both at the R&D site and the manufacturing sites were fun and interesting but overall they made it a very long day.