[Captain Ahab Jr]

Most important thing to remember is be yourself.

Try to sound confident even if you are nervous (practice being interviewed by one of your teachers), take time to think when answering questions, don't talk to much, don't bull$hit as experienced engineers have finely honed bull$hit detection radar that works even over the phone, don't be afraid to ask questions but don't interupt, don't sell yourself or your qualities too cheaply, try to put a positive slant on any of your weaknesses, research the company, ask lots of questions as you have here and you will be fine.

They will be looking for not the brightest or the highest grade scorer but someone with initiative, get up and go, common sense, can think logically if even they don't know all the answers, enjoys new challenges, not afraid to say 'I don't know or I need some help with this', a hard worker prepared to put in extra effort, has attention to detail so they can grow and develop you into the best engineer for their business.

As mentioned relax and enjoy the experience

You are local to the company so you already have an advantage, run with it, good luck and report back.