Definition
Direct answer
Ultrasonic testing introduces high-frequency sound and interprets reflections from internal interfaces or discontinuities. On the CWI Practice Test, treat Which NDE method uses high-frequency sound to evaluate internal reflectors as a concept to understand, not an answer letter to memorize. Review how it affects safety, code interpretation, jobsite decisions, or timed problem solving, then answer a short practice set tied to Welding fundamentals, Inspection terminology, Welding symbol interpretation.
How to use this answer
Read the answer once, then prove it by choosing an answer in a practice question before looking at the explanation. If the miss repeats, tag the domain as NDE and drill a smaller set before returning to mixed practice.
Prep path
CWI Study Guide
Independent CWI study guide for welding symbols, inspection fundamentals, discontinuities, NDE, and code application.
SamplesCWI Sample Questions
Public CWI Practice Test sample questions with explanations.
PracticeOpen CWI Practice Test
Start with the 20-question free set before deciding whether to unlock the full question bank.