Q:- Why is it essential to clean the surrounding parent metal adjacent to the weld metal made by MMA(SMAW)which is to be ultrasonically tested?
- Sound waves will not travel though paint
- Remove any rust
- The spatter will impede the contact of the probe and the parent material surface
- Spatter will reflect the back will echo signal and give spurious indications
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AWS-CWI Certification | Certified Welding Inspector Exam Training Course 