In radiographic inspections, the standard test piece included in every radiograph provides an effective check on the overall quality and bears a numerical relation to the thickness of the part being tested. This piece is called a/an __________.
• Purpose of the standard test piece in radiographic inspection • How film sensitivity and defect visibility are checked in X‑ray or gamma-ray testing • The relationship between the test piece and the material thickness being examined
• Which option names a device or piece that is actually placed in the radiograph to indicate how well small flaws can be seen? • Which terms sound more like devices for measuring light intensity or exposure rather than checking image quality? • Which name is commonly associated with a calibrated ‘step’ or ‘hole’ type indicator that corresponds to material thickness?
• Identify which choice is used as a standard image quality indicator in radiographic testing, not just a measuring instrument • Confirm which device is designed to have a numerical relation to thickness of the test object • Eliminate options that relate mainly to exposure control or film protection rather than sensitivity/quality indication
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