where are these questions coming? is there someone from your work that you find attractive but too shy to ask out?
If I like a guy and I notice that he is shy, Then I will just bump into him or offer him a snack. Another way I can think of, I will drop my books in front of him and ask him to pick it up. it's a good way to start a conversation and remove his fear of me.
Just few conversations will tell me a lot about our chemistry and common interest.