(Picture is from the site and links to it)
It's all here.
As I've done the quizzes for a few years now I categorize the questions into four parts.
1. Stuff I don't know at all, generally before I started racing, i.e. 1983 or so.
2. Stuff I know reasonably well, typically from the era where there was actually cycling news available in magazines and papers (like Velonews). When I could get my hands on cycling news I devoured it. Typically 1983 (the start of Winning Magazine) until about 1998, when the racing got a bit much for me, meaning the doping was out of control.
3. Stuff that I really don't know since I purposely didn't follow racing. It was to the point where I didn't recognize the USPS team when I finally saw a picture of the Tour because they were in gray kits. 1999 - 2005 or so.
4. The current era, meaning the last ten years or so. 2005 until now. I sort of know some stuff, don't know a lot of stuff. The first Tour I really followed in this era was 2006.
Most of the questions seem to draw from numbers 2 and 3. Sometimes there are a bunch of questions from 1 and I basically get them all wrong.
There are some filled in spots of knowledge because I bought DVDs on particular races. Typically they're the classics like Ghent or Flanders.
Anyway it's a neat distraction from not reading about the races and such, and it's free.