This latest addition to ASNT’s Study Guide series presents fundamental information intended to assist the candidate preparing for Level III leak testing examinations such as the ASNT Central Certification Program. Modern leak testing equipment and techniques are introduced. Leak flow and vacuum gas characteristics are presented in an organized and understandable manner facilitating the planning and performing of leak tests. Review questions and answers provide an practice before taking exams. Further recommended references are included. ISBN-13: 978-1-57117-109-2 (print) ISBN-13: 978-1-57117-292-1 (ebook)