Contains the background information needed by students and NDT personnel who want to qualify for NDT Levels I, II, and III certification-in accordance with the American Society for Nondestructive Testing (ASNT) Recommended Practice No. SNT-TC-1A (August 1984 edition). Contents follow the general outline of SNT-TC-1A. Includes typical chapter questions and answers, as well as information on recent state-of-the-art developments. In the case of Level...