There's more!! They should just post the whole darn book. Here's the latest installment of Scott Janus' "Audio in the 21st Century" from Audio DesignLine. Part 6 discusses the doppler effect.
I think I'm going to postpone the test because I'd like to post it after all installments are posted at DesignLine. BTW, the highest score will get their choice of either a six-pack of wonderful Wisconsin micro-brewed beer or a block of premium cheese.