Worley Process Engineer (New Graduate) interview questions

I was interviewed by two managers of the process engineering team. They asked me half an hour of technical questions followed by another half hour of behavioral questions. Behavioral questions were strange and invasive (e.g. How many hours a day did you study each day at school? Did you have a very active social life? Do you use your mobile phone a lot?). One of the managers told me that other new graduate engineers at their company worked late nights and came in every weekend even if they had completed their required duties, and insinuated that I would be expected to do the same.