Which of the following is NOT a nondestructive weld test?

Nondestructive testing (NDT) methods are designed to evaluate the properties of a material, component, or system without causing damage. The correct answer identifies a test that does not fall under this category.

Impact testing is a destructive test used to determine the material's toughness and ductility by measuring the energy absorbed during fracture. This process involves purposely breaking the material, which renders that specific piece unusable afterward.

In contrast, the other methods listed—radiography, ultrasonics, and visual inspection—are nondestructive. Radiography employs X-rays or gamma rays to inspect the internal structure of a weld, identifying issues such as cracks or voids without compromising the integrity of the sample. Ultrasonic testing uses high-frequency sound waves to detect internal flaws, also preserving the material's usability. Visual inspection involves examining the surface of the weld for visible defects and can be conducted without inflicting any damage.

Understanding the distinction between destructive and nondestructive testing methods is crucial for ensuring that weld quality is assessed while the integrity of the materials involved remains intact.