I will agree with you to a certain extent. Not knowing the ERJ, which I think you fly, you could probably explain to me the fuel system and diagram it roughly putting the pumps and tanks in the right place, explain motive flow, how many pumps the system has, what it means when you you get a "fuel low press warning" and what to do about it, right?
This is the type of info they are looking for. A working knowledge of your A/C. If you show up and say " I dunno, I just fly it!" They will think you are from the shallow end of the gene pool and look to the candidate that spent the time preparing themselves for their potential new employer.

Interviews are a game......luck is when preparation meets opportunity!