Ultrasonic Testing (UT) Level III Online Quiz Ultrasonic Testing (UT) is a crucial non-destructive testing method used in various industries to detect flaws and measure material thickness. As part of the certification process for UT Level III, professionals must demonstrate a deep understanding of both the theoretical and practical aspects of ultrasonic testing. ASNT Ultrasonic Testing (UT) is one of the most difficult certification exam offered by ASNT. [ays_quiz id="110"] Practice 2000+ ASNT UT Level III Questions + Realistic Mock Exams