American Society for Nondestructive Testing (ASNT) Radiographic Testing Practice Test

To achieve a penetrameter sensitivity of 2-2T or better, the radiographic procedure must adequately define a 2T hole in the penetrameter. This sensitivity rating indicates the ability of the radiographic system to detect flaws of a certain size within the material being tested. The "2T" specification refers to the hole size in the penetrameter, which is used as a reference to gauge how well the radiograph can delineate the presence of imperfections.

Defining a 2T hole means that the radiographic setup is capable of resolving details equivalent to twice the nominal thickness of the penetrameter. This ensures that the radiographic image obtained will have the necessary contrast and detailing capability to visualize flaws that are critical for assessing the integrity of the specimen. Meeting this requirement is crucial for ensuring that the radiographic testing is sufficiently sensitive to detect potential defects that could compromise the material or component in service.

The other options do not directly address the sensitivity measurements and are not sufficient for guaranteeing the necessary resolution for 2-2T. For example, placing the film close to the specimen may improve sharpness, but without the appropriate hole size in the penetrameter, the sensitivity requirement would not be