Score higher on Mechanical Aptitude Tests. Learn all about basic mechanics and all the mechanical parts and tools. Gears, cams, levers, pulleys, springs and clips; they're all here in this book. Five chapters on mechanics plus an Appendix covering Basic Math to help you out at school. 237 pgs. Written by Joe Jacobs, a former maintenance technician for the US Postal Service; he has worked on everything from conveyor belts to computer networks.