What is the purpose of acceptance criteria in VT?

• A. To define measurement tolerances.
• B. To determine instrument calibration schedule.
• C. To define which indications are permissible or rejectable and provide basis for disposition decisions.
• D. To determine the color of the coating.

Answer: (C)

Acceptance criteria establish which surface indications are permissible and which are not, and they provide the basis for disposition decisions. They set the concrete limits for flaws you can tolerate—such as size, length, depth, location, and type of indications you may encounter on a part or weld. When you find indications during VT, you compare them to these criteria. If they fall within the allowed limits, the part can be accepted; if they exceed them, it must be rejected or sent for repair according to the plan. This creates objective, repeatable judgments across inspectors and projects, supporting safety and compliance with standards.

Acceptance criteria aren’t about measurement tolerances in dimensional metrology, nor do they govern calibration schedules for instruments, nor do they specify coating color.