Answer:
What can be big, white, dirty and wicked?
What five-letter word becomes shorter when you add two more letters?
You can spin, wheel and twist. But this thing can turn without moving.
What has to be broken before it can be used?
I'm white, I'm round, but not always around. Sometimes you see me, sometimes you don't.
Before Google, we actually had to physically look things up in this building full of knowledge.