Dark crescent-shaped indications on a radiographic film are most likely caused by:

Related MCQs

• A radiographic exposure with 3700 GBq (100 Ci) source of Ir-192 using source to film distance of 60 cm results in a radiation intensity of 0.12 Gy/h (11.8 R/h) and a radiographic density of 2.5. The intensity of radiation needed to obtain the same density when the source to film distance is changed to120 cm is:
• A radiographic indication in a weld, characterised by two parallel dark lines in the film image, would probably be caused by:
• Dark rounded indications with rather smooth edges appear on the radiograph of casting made in sand mould. These indications would be interpreted as:
• A thin, jagged, dark line inside the weld image on a radiographic film is probably:
• A low density image of the letter ‘B’ on a radiographic film would probably be caused by:
• Static marks on radiographic film are caused by:
• Fluorescent penetrant indications are more visible than colour contrast penetrant indications because:
• A group of indications, some sharp and some broad and fuzzy, were found on an area of a small forging. Demagnetization and re-inspection eliminated these indications. What was the probable cause?
• A dark crescent shaped mark in the centre of a weld bead radiographic image would probably be:
• What is the most important factor in determining the archival quality of radiographic film?