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Which welding discontinuity is made of gas cavities in weld metal is a TradeCert Prep study concept connected to CWI Practice Test prep, not a copied official exam item. Porosity is trapped gas in the weld metal and is commonly described as rounded cavities. Always verify licensing, certification, and testing rules with the current official candidate bulletin, state manual, code book, or testing provider before relying on a detail for compliance.
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