Following around a year of private beta testing, Facebook’s Q&A product, Facebook Questions, was re-introduced on Thursday.

Available in a limited public beta, Facebook Questions allows users to seek answers to imperative questions from other members of the social-networking site.

Facebook Questions will try to challenge long-established several Q&A sites such as Quora and Yahoo Answers.

Announcing the public beta, Facebook said, “Like many of our products, Questions originated as people began using Facebook in a new and unexpected way.”

Facebook said there are multiple places on the Web that let users to ask questions, but very few let users to get responses straight from their friends.

All questions asked via the new service are public, but each user receives a personalized view of the responses that are ranked by what their friends voted on.

Facebook is making foray into the area of social question sites at a time when Q&A site Ask. com of Oakland started incorporating social searches.