The selection of the proper source-to-film distance is a primary factor in controlling:

Related MCQs

• The most important factor required for the proper interpretation of ultrasonic test results is:
• A good Cobalt-60 shot is made on a 7.6 cm (3 inches) steel casting using an exposure time of 10 minutes and a source-to-film distance of 91.5 (36 inches). If it is necessary to change the source-to-film distance to 61 cm (24 inches), what exposure time would produce a similar radiograph if all other conditions remain the same?
• 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:
• If an exposure time of 60 seconds and source to film distance of 365.7 m (1200 feet) is necessary for a particular exposure, what exposure time would be needed for an equivalent exposure if the source- to-film distance is changed to 457.2 m (1500 feet)?
• Source-to-object distance, object-to-film distance, and source size are the three factors that control the of the radiograph.
• Which of the following is the proper first step in removal of excess penetrant when using the solvent removable penetrant process?
• What is the proper technique for removal of excess penetrant from a part when using a water washable penetrant process?
• The formula, NI = 45000/(L/D), is used to calculate the proper magnetising current for:
• The formula, NI = 45000/(L/D), gives proper magnetising current for a coil, regardless of coil size as long as:
• The proper number of ampere-turns for a given test specimen is determined by: