Answer :
The ultrasonic frequency that is suitable for non-destructive testing (NDT) methods depends on the specific application and material being tested.
However, out of the given options, the most commonly used ultrasonic frequency for NDT methods is 20000 Hz (or 20 kHz).
NDT methods utilize ultrasonic waves to inspect and evaluate the integrity of materials without causing any damage. The choice of frequency depends on factors such as the thickness and type of material, the desired level of resolution, and the specific defects or flaws that need to be detected.
Higher frequencies, such as 20000 Hz, are typically used for thin materials or small flaws, as they provide better resolution and can detect smaller defects. Lower frequencies, such as 20 Hz or 200 Hz, are generally used for thicker materials or larger flaws, where depth of penetration is important.
It's important to note that different NDT methods, such as ultrasonic thickness testing, flaw detection, or weld inspection, may require different frequencies for optimal results. Therefore, the choice of frequency should be based on the specific application and the desired outcome.
In summary, the most suitable ultrasonic frequency for NDT methods out of the given options is 20000 Hz (or 20 kHz). However, it's crucial to consider the specific application, material, and desired outcome when selecting the appropriate frequency for a particular NDT method.
learn more about ultrasonic frequency here
https://brainly.com/question/11052720
#SPJ11
