AG Mechanics CDE Practice Exam 2025 – The Comprehensive All-in-One Guide for Success

Question: 1 / 400

The layer formed on top of the weld caused by the flux and impurities of the base metal floating to the top is called:

bead

puddle

slag

The layer formed on top of the weld caused by the flux and impurities of the base metal floating to the top is called "slag." Slag is a byproduct of the welding process and needs to be removed after the weld has cooled.

The other options:

A. bead - refers to the distinctive shape left by the welding process.

B. puddle - is a term used to describe the molten metal pool during welding.

D. tack weld - is a temporary weld used to hold pieces in place before the final welding.

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tack weld

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