One of the things that becomes obvious as I gain experience, is that I actually think I know less.
As I gain experience the number of things that I could know something about seems to increase at an exponential rate, but my knowledge still only increases at the same rate... So as time goes on, the level of knowledge of all things decreases.
So, I ask stupid questions all the time, because I know that something may be related to what we are working on, but I don't have the knowledge to be able to ask smart questions. At this point, any question can help you get to how the subject area can help.
Don't worry about looking stupid asking questions. Anybody in this game who claims they know everything lying, there is just too much to know.