The ASE (Automotive Service Excellence) exam is part of certification for people in the auto industry who have completed 2 years relevant work experience. There are 52 exams which cover most aspects of automotive repair and service. 
ASE Test Preparation - A4 Suspension and Steering by 
ASE Test Prep and Study Guide by 
Chek-Chart ASE Study Guide for A3, Manual Drive Trains and Axles by If you're not sure what you need, or how to begin, come in to RTC Library, call us at (425) 235-2331, or email us at librarian@RTC.edu. We'll be glad to help.
These websites contain more details about the exam and practice questions and tests to help you prepare.