Read the following passage:
In Gas Metal Arc Welding (GMAW), an external shielding gas is continuously fed through the torch nozzle around the consumable wire electrode. The primary function of this gaseous shield—often a blend of argon and carbon dioxide—is to displace ambient atmosphere from the molten weld pool. Without this continuous gas barrier, oxygen and nitrogen in the surrounding air would react with the liquid metal, causing porosity, severe embrittlement, and structural weakening of the finished joint.
Statement: Based on the passage, the shielding gas mixture serves to protect the molten metal from surrounding environmental gases that induce structural brittleness and porous flaws.
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True
The statement is true because it accurately restates the passage's explicit point: the shielding gas displaces surrounding atmospheric air to prevent oxygen and nitrogen from reacting with the molten weld to cause porosity and embrittlement.
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Anahtar Kavram
Paraphrased Fact Recognition requires identifying factual details from a passage that have been restated using alternative vocabulary, synonymous phrases, and altered sentence structures.
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