Which statement best describes the purpose of the bend test in welder qualification?

Which statement best describes the purpose of the bend test in welder qualification?

• A. To evaluate ductility and weld-root integrity.
• B. To measure weld color.
• C. To check weld alignment only.
• D. To determine corrosion resistance.

Answer: (A)

The bend test is used to check how ductile the weld is and whether the weld root remains sound when the joint is bent. In this test, the welded specimen is bent through a specified angle so the weld experiences bending stresses. If cracks appear in the weld metal or in the heat-affected zone at the root, that shows insufficient ductility or poor root fusion. If the weld deforms without cracking and the root stays intact, it indicates the weld has adequate ductility and a sound root penetration, which is exactly what qualification wants to verify. The other options miss the point: color is cosmetic and not a measure of performance; alignment is important but not the main purpose of the bend test; and corrosion resistance requires entirely different testing.

The bend test is used to check how ductile the weld is and whether the weld root remains sound when the joint is bent. In this test, the welded specimen is bent through a specified angle so the weld experiences bending stresses. If cracks appear in the weld metal or in the heat-affected zone at the root, that shows insufficient ductility or poor root fusion. If the weld deforms without cracking and the root stays intact, it indicates the weld has adequate ductility and a sound root penetration, which is exactly what qualification wants to verify. The other options miss the point: color is cosmetic and not a measure of performance; alignment is important but not the main purpose of the bend test; and corrosion resistance requires entirely different testing.