List 3 production discontinuities.

• A. Surface imperfections, laminations, notches
• B. Cracks in welds, porosity, slag
• C. Surface finishing defects
• D. Warping and bending

Answer: (A)

Production discontinuities are flaws that originate during the manufacturing and fabrication of structural material, not from service conditions. The best three to identify are surface imperfections, laminations, and notches. Surface imperfections are flaws on the surface such as pits or scratches that can act as crack initiation sites. Laminations are internal layer separations within sheet or plate material that weaken the cross-section. Notches are abrupt cross-sectional interruptions created during forming or cutting that concentrate stress. The other options point to welding defects (cracks in welds, porosity, slag), finishing defects from the surface treatment, or dimensional distortions like warping and bending—issues related to specific processes or service conditions, not the general category of production discontinuities.