What is the purpose of a penetrameter?

What is the purpose of a penetrameter?

• A. To help determine image quality/definition of a radiograph
• B. To measure weld depth
• C. To calibrate radiographic exposure
• D. To locate defects in a weld

Answer: (A)

The penetrameter is used as a standard reference to judge radiographic image quality. It provides known features (holes or steps) that appear on the film, so you can check whether the radiograph has enough sharpness and contrast to reveal a flaw of a specified size at the material thickness. If the smallest feature on the penetrameter is clearly visible, the image meets the required definition; if not, the radiograph may not be acceptable. This is why its purpose is to verify image quality/definition, not to measure weld depth, calibrate exposure, or locate defects.

The penetrameter is used as a standard reference to judge radiographic image quality. It provides known features (holes or steps) that appear on the film, so you can check whether the radiograph has enough sharpness and contrast to reveal a flaw of a specified size at the material thickness. If the smallest feature on the penetrameter is clearly visible, the image meets the required definition; if not, the radiograph may not be acceptable. This is why its purpose is to verify image quality/definition, not to measure weld depth, calibrate exposure, or locate defects.