Fraktalkid

I scored 79% without even trying, but then I am a Brit now residing in London, although I lived in Chiang Mai for several years. I do agree that the language may be difficult and that some Thais will struggle with this test, but I think this would be mainly due to the complicated English more than how difficult the questions actually are. I have several Thai friends in London whom I'm confident would pass this test, with an adequate amount of time to study.

As others have mentioned, a study book prepares you for this and so putting in a decent amount of effort should ensure a pass. Most of the questions are pretty pointless however - especially the statistics questions. It's not exactly useful knowledge!

Chiang Mai airport: nothing to write home about but SO convenient, as others have pointed out. The only useful addition would be a 7-11 (which it didn't have last time I used the airport back in late 2010).