Non-Destructive Testing (NDT) Practice Test

On a sound wave display, which indicator represents the flaw reflection?

1. A

2. B

3. C

4. D

The correct answer is: C

In the context of a sound wave display, such as those used in ultrasonic testing, the display typically represents reflections of sound waves. When a sound wave encounters a flaw within a material, a portion of the wave is reflected back to the transducer. The indicator that represents this flaw reflection is usually characterized by a distinct amplitude or peak on the wave display. The selection of the indicator that reflects this flaw is important because it usually appears differently from other reflections, such as those from the material's boundaries or surface. The amplitude and timing of this reflection can provide essential information about the size, shape, and location of the flaw. In a standard display, the flaw reflection is often seen as distinct from other signals. It is critical for technicians and inspectors to accurately identify this indicator, as it can signal potential issues in the material being tested. This understanding is vital for ensuring structural integrity and safety in various applications, including construction, manufacturing, and aerospace.