A couplant is a liquid substance used between a search unit and a test surface to permit or improve the transmission of ultrasonic energy.

Study for the GTAW WLD 150 Welding and Joining Test. Review with flashcards and multiple choice questions. Enhance your welding expertise and prepare confidently for your certification!

Multiple Choice

A couplant is a liquid substance used between a search unit and a test surface to permit or improve the transmission of ultrasonic energy.

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