At my old position I eventually learned how to do most of the things we did in that office, and got a lot of questions not relevant to what my actual role was as a result. Most of the time I would do the gracious thing and just answer if it was something quick but if it was a long, involved explanation or the same person asking me the same question over and over, I would explain to them that I was busy with my own work and that they really should be seeking assistance from their supervisor. This was difficult for me at first because I am a helpful person by nature I guess. But it got so bad sometimes that I quickly got over feeling like a jerk about it. When I changed positions it was weird and a little bit of a relief to not be the one in the office who knows all the things. Good luck with trying to deflect and get your own stuff done!