Which statement about nondestructive testing is true?

Which statement about nondestructive testing is true?

• A. Nondestructive testing requires a part to be permanently removed from service.
• B. Nondestructive testing can only be performed on metal parts.
• C. Nondestructive testing does not require removal from service.
• D. Nondestructive testing always damages the part.

Answer: (C)

Nondestructive testing is about checking a component’s condition without causing damage or altering its service life. This approach lets you inspect while the part is in service or with only minimal disruption, and it doesn’t change the part’s integrity. There are many techniques, such as visual inspection for surface issues, dye penetrant and magnetic particle methods for surface flaws, ultrasonic and radiographic methods for internal features, and eddy current testing for near-surface defects. Because of this, the statement that nondestructive testing does not require removal from service is true. Those other ideas aren’t accurate: testing isn’t limited to metal parts, since many methods apply to non-metallic materials; it isn’t necessary to remove the part from service in every case, though access and safety can require it in some situations; and the purpose of NDT is not to damage the part.

Nondestructive testing is about checking a component’s condition without causing damage or altering its service life. This approach lets you inspect while the part is in service or with only minimal disruption, and it doesn’t change the part’s integrity. There are many techniques, such as visual inspection for surface issues, dye penetrant and magnetic particle methods for surface flaws, ultrasonic and radiographic methods for internal features, and eddy current testing for near-surface defects. Because of this, the statement that nondestructive testing does not require removal from service is true. Those other ideas aren’t accurate: testing isn’t limited to metal parts, since many methods apply to non-metallic materials; it isn’t necessary to remove the part from service in every case, though access and safety can require it in some situations; and the purpose of NDT is not to damage the part.