More engines, and a little more challenging. Thanks to Frank Remlinger for supplying many of the photos.
Note that you can click on the answer - you don't need to click on the tiny round button on the left.
Try to avoid hitting the BACK button, as that may mess up your score. At the end of the game you can see the questions and answers all on one page.
Q: What is this beefy mill? (question 1 of 19)