Question

welding over slag is a good practice because it adds to the deoxidizing of the weld deposit.

true
false

Explanation:

Analyze the statement

The statement asserts that "Welding over slag is a good practice because it adds to the deoxidizing of the weld deposit." We need to evaluate whether this is true or false based on standard welding practices.

Evaluate welding over slag

Slag is a byproduct of flux-shielded welding processes (like SMAW or FCAW) that protects the cooling weld pool from atmospheric contamination. Once solidified, slag must be completely removed before depositing subsequent weld beads. Welding directly over existing slag traps the non-metallic material inside the weld metal, leading to a severe defect known as Welding Contamination or slag inclusion. Slag does not act as a deoxidizer once it has solidified on top of a weld bead.

Determine the correct option

Since welding over slag is a poor practice that compromises the structural integrity of the joint, the statement is incorrect. Therefore, the correct answer is False.

Answer:

• True
• False (Correct answer)