Free interactive NDT lessons and games covering liquid penetrant testing, ultrasonic testing, radiation safety, and computed and digital radiography (CR, DR, CT), built by an ASNT Level III for students, apprentices, and anyone curious about how non-destructive testing works. 

These short lessons introduce the basic principles of each method. They are not a substitute for formal training to SNT-TC-1A, CP-189, or NAS 410, and no certificate is issued. If you need documented training for your qualification program, see NDT Training Services.