I say not supposed to because of several things. An RO's response or how they ask the question could be seen as coaching. The shooter's response could purposely be incorrect to force contact with the RO but they "changed their mind at the last minute". There might not be a specific rule for it, but when Troy gave my RO class he said to not do it for reasons similar to above. The RO has a job to do. Maybe s\he should just stick to that. I've RO'd noobs and GM's and only once did I have contact with a shooter (incidental contact after the last shot). I've never asked a shooter, that wasn't in my new shooter class, the direction they were going.