If you're in the auto resale or repair business or have scoured shops for project car parts, you probably already know that the junkyard of the 21st century can be a wired, high-tech and global operation. If it's been awhile, if ever, since you've roamed through aisles and piles of castoff cars and parts, maybe you'll find a surprise or two when you test your knowledge of salvage, wreckage and junk, online and in person.