Most Helpful Guy
Click on your profile, then go to "questions" on your left under your profile, then find the question you want to delete and click the paperclip thingy and then yes.
But i think you must wait 24 hours, not sure though.0
Most Helpful Girl
That's not possible. You may disavow questions, so they're not attached to your username after some time. Check the link below for more information.