Covers principles and practices of liquid penetrant inspection. Learn why and when to use various types of penetrant materials, and the proper techniques necessary for reliable inspection. Addresses the evaluation of liquid penetrant indications, interpreting standards and specifications, and checking penetrant system quality. Review fundamental liquid penetrant principles and techniques; develop and write procedures; and inspect welds, castings, forgings, and machined components. Parts are evaluated according to relevant codes and/or standards.