ENTC 402 Radiography Questions Level 1 fully solved

ENTC 402 Radiography Questions Level 125 x 10-5m (10 mils) - correct answer When radiographing to the 2-2T quality level, an STM penetrometer for 13 mm (0.5 in.) thick 024 aluminum alloy has a thickness of: kilovoltage - correct answer The penetrating ability of an X-ray beam is governed by: radiographic sensitivity - correct answer The ability to detect a small discontinuity or flaw is called: radiographic contrast - correct answer The difference between the densities of two areas of a radiograph is called: intensifies the primary radiation more than the scatter radiation - correct answer Lead foil in direct contact with X-ray film: a. graininess of the film b. the unsharpness of the flaw image in the film c. the contrast of the flaw image on the film - correct answer Radiographic sensitivity, in the context of the minimum detectable flaw size, depends on: radiation should proceed from as small a focal spot as other considerations will allow - correct answer In order to decrease geometric unsharpness: the kilovoltage should be as low as other factors will permit - correct answer A general rule often employed for determining the kilovoltage to be used when X-raying a part is that: 15 sec - correct answer If an exposure time of 60 seconds was necessary using a 1.2 m (4 ft) source-to-film distance for a particular exposure, what time would be necessary if a 0.6 m(2 ft) source-to-film distance is used and all other variables remain the same?