In the past I asked what responsibility does a person have to look up and investigate an answer to a question that he wasn't able to answer.
I'd now like to ask a similar question with a few points.
If a Rov is asked a practical question, are they required to respond (if they know the answer) or can they say "go ask another Rov" if they don't wish to be bothered (or feel it will take away from their learning.) If they don't know the answer at all, are they required now to look it up? Being that they are a Rov and have a certain responsibility to those asking questions.