Practical Non-Destructive Testing aims to cover the principles, procedures, applications, limitations, codes and standards widely used in non-destructive testing (NDT) techniques. Since 1996, when it was first published, there have been rapid advances in the techniques used in NDT. The authors while updating the earlier chapters also added new techniques in the Second edition on Neutron radiography, Pulsed Eddy Current Testing, Low Frequency Eddy Current Testing, SQUID based Eddy Current Testing and Mechanical Impedance Analysis. The Chapter on Reliability in NDT was revised and expanded completely and renamed as POD Concepts in NDT.