Yes!
The Rancho Campus Store has a vending machine at the library's front entrance that contains Blue Books, Scantrons, pens, highlighters, and pencils. (see the picture to the right)
If you need a scantron or bluebook and the campus store is closed:
The Chino Campus has a vending machine in the hallway of the CHMB, around the corner from the first-floor restrooms, and the Fontana Campus has a vending machine in the student lounge.