I-CAR AWQT Practice Questions - I-CAR Aluminum Welding Qualification Test (AWQT) Exam

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Aluminum oxide forms on bare aluminum surfaces and presents a significant welding obstacle. Approximately what is its melting point compared with the underlying aluminum base metal?

About 600 deg F, well below the base metal melting point About the same as the base metal, roughly 1,200 deg F About 3,700 deg F, roughly three times higher than the base metal It does not have a true melting point because it sublimates at room temperature

Correct Answer:

About 3,700 deg F, roughly three times higher than the base metal

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