There is a function in the Spam section of admin control panel called:
Use moderation for users with few points:
So, all question and answers of users with less than a point will be moderated by admin.
Is it possible that all questions of the users be moderated by admin in a situation that answers of the users that passes the specific point limit be released without moderation.
In fact, users are NOT able to ask questions without admin approval but are able to answer questions without admin approval when reach a point limit.