If a Welder Is Not Engaged in the Specific Process

question 33

Multiple Choice

If a welder is not engaged in the specific process of welding for which he or she is qualified for a period exceeding ____, the welder must requalify.

• A) two months
• B) six months
• C) one year
• D) two years

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Definitions:

IR Absorption

A technique used to identify and study chemicals by measuring the absorption of infrared radiation at different wavelengths.

IR Spectroscopy

A technique used for identifying and studying chemicals by analyzing the infrared light absorbed, emitted, or scattered by the sample.

O-H Stretch

A vibrational mode in infrared spectroscopy indicating the presence of an O-H bond, useful in identifying alcohols, phenols, and acids.

IR Spectrum

A graph displaying the infrared light absorption of molecules, used to determine molecular structures.