Well, of course it is likely to increase traffic to your hubs on account that answers are an easy way to leave back links. Since this will be indirect traffic to hubs, your best angle would be to have an intriguing profile (since this is what it's back linked to).
A great bio, and of course a resume of accolades, may very well drive people to your individual hubs. The trick here is to answer providing value to begin with. Concentrate on helping others and you'll come off as an authority figure. While consistent answering can be a traffic generation tool, there are many other ways to drive traffic to your hubs on a higher scale.