Yes, you do make money off of the questions you ask here at Hubpages. I have noticed that the money goes into my Adsense account and shows up as views. However, the RPM is very low.
I have noticed that Google has sent some traffic my way for some of the questions I have asked. It is very difficult to get your questions ranked in search engines but it is possible. Usually I get tons of traffic when I ask the question and then very little traffic after the first few days.
I find the questions very helpful and love that others have taken the time to answer them.