In the described destructive test, under which condition are cracks considered acceptable?

In the described destructive test, under which condition are cracks considered acceptable?

• A. The cracks may exist if there are no visible defects and the pieces do not separate
• B. The cracks must be completely absent
• C. The cracks must be located at the root
• D. The cracks must be on the face of the bend

Answer: (A)

Acceptance in this destructive test centers on whether cracks compromise the joint. Cracks may exist if there are no visible defects and the pieces do not separate, because tiny surface cracks that do not propagate and do not cause failure show the weld can endure the applied deformation without losing cohesion. The crucial points are that there are no hidden defects lurking and the joint stays bonded under load. Cracks at the root or on the bend face would indicate problems in critical areas and are not acceptable, since they suggest weak fusion or stress concentration that could lead to failure.

Acceptance in this destructive test centers on whether cracks compromise the joint. Cracks may exist if there are no visible defects and the pieces do not separate, because tiny surface cracks that do not propagate and do not cause failure show the weld can endure the applied deformation without losing cohesion. The crucial points are that there are no hidden defects lurking and the joint stays bonded under load. Cracks at the root or on the bend face would indicate problems in critical areas and are not acceptable, since they suggest weak fusion or stress concentration that could lead to failure.