The company moved quickly from phone interviews to in-person interviews. I had two phone interviews before being brought in.

The on-site interview was intense and about 4 hours long (1 hour was a tour). You are bombarded with pre-defined technical questions, many of which have nothing to do with the position you are applying for. Is this a PE exam?

It's not that I didn't learn this stuff in engineering school, but that was a long time ago, and since I haven't used it, it's not fresh. Although, obviously, in a couple of days, I could be up to speed on all that. The interviewers were all very young and most had large opinions of themselves. In general, I would say most folks I met there are not well-balanced; they live to work.

For this position, the engineer is totally responsible if equipment in their area breaks down, is always on call, and works many hours.

I decided partway through the interview that the position was not for me but went along to see what else they might ask.

Just pull out your engineering texts and pick something. Many questions related to HVAC equipment and operation were asked, for which I had nothing to do with this position.