Question

Which of the following is a disadvantage of TOFD ultrasonic inspection?

A) to be effective, TOFD depends on the orientation of the discontinuity
B) Although TOFD can monitor the growth of a discontinuity, it cannot accurately measure its height
C) Inspection speed is slow, causing excessive delays in data presentation
D) There is a loss of sensitivity for near-surface testing

Answer 1

A disadvantage of TOFD ultrasonic inspection is its dependence on the orientation of the discontinuity.

Step-by-step explanation:

A disadvantage of TOFD (Time of Flight Diffraction) ultrasonic inspection is that it depends on the orientation of the discontinuity to be effective. TOFD relies on the scattering of ultrasound waves around the edges of the discontinuity to provide accurate measurements and detect flaws. Therefore, if the orientation of the discontinuity is not favorable, it may be challenging to obtain reliable results.

Other options mentioned in the question, such as the inability to accurately measure the height of a discontinuity, slow inspection speed causing delays in data presentation, and the loss of sensitivity for near-surface testing, do not represent disadvantages of TOFD ultrasonic inspection.