PCN NDT Radiographic Testing Level 2 Exam case studies
PCN NDT Radiographic Testing Level 2 Exam · Put your knowledge to work in context.
PCN NDT Radiographic Testing Level 2 is a personnel certification for radiographers who can set up and perform radiographic inspections to a written procedure, select exposure techniques, produce and process images, interpret radiographs, and report results against an acceptance standard. It is aimed at inspectors and technicians in fabrication, castings, welding, aerospace, power generation and oil and gas, where radiographic testing is used to find internal discontinuities. The PCN NDT Radiographic Testing Level 2 Exam case studies are 5 cases and about 2,529 words.
1Penumbra Four Times the Calculated Value on a 25 mm Weld
A 25 mm carbon steel butt weld is radiographed with a 3.0 mm focal-spot X-ray unit at 700 mm source-to-film distance. The film is in direct contact with the plate, and the source-side surface of the weld is 20 mm from the film.
546 words, about 3 min2Ir-192 Source Fails to Retract at Night
During night-shift radiography of a 508 mm pipe spool, an Ir-192 source fails to retract into its projector. The guide tube is taped along the pipe, and the crank is at the projector about 1 m from the exposed end.
521 words, about 3 min3Film Density Falls After 74 Days with an Ir-192 Source
An Ir-192 projector was loaded with 80 Ci (2.96 TBq), and the exposure chart was made on the day of loading. The chart specifies 90 s at 600 mm to produce density 2.0 on D7 film for a 20 mm steel weld.
493 words, about 2 min4DWDI Elliptical Technique Proposed for 168 mm Pipe
Twelve butt welds on 168.3 mm OD × 7.11 mm wall pipe are to be radiographed in a rack. The pipe is accessible only from the outside; there is no internal access and no crawler.
499 words, about 2 min5A 9 mm Fusion-Line Indication with a Negative MT
A 12 mm thick carbon steel butt weld is radiographed using a single-wall technique. The film shows a 9 mm long, slightly curved dark indication near the fusion line.
470 words, about 2 min