Question 124General Subjects - QMED

The correct answer is D) reduce oxidation. The flux that covers the electrode in arc welding serves to reduce oxidation of the molten metal. The flux acts as a protective shield, preventing the molten metal from coming into direct contact with the air and oxidizing. This helps maintain the desired properties and quality of the weld. Options A, B, and C are incorrect because they do not directly address the primary function of the flux, which is to prevent oxidation. While the flux can influence factors like penetration, metal fatigue, and heat transfer, its primary purpose is to reduce oxidation of the weld.