Top 150+ Solved Radiographic Testing Level 2 MCQ Questions Answer
Q. The standard dose rate of a radioactive isotope is expressed in:
a. Roentgens per hour per curie at any standardised distance not exceeding 75 feet
b. Roentgens per hour per curie per foot
c. Roentgens per hour at a distance of one foot
d. Curies per hour
Q. At 61 cm (two feet) from a radiation source, radiation intensity is 3 Gy/h (300 R/h).What is the Intensity at 244 cm (8 feet) from the source?
a. 0.12 Gy/h (12R/h)
b. 1.2 Gy/h (120 R/h)
c. 0.1875 Gy/h (18.75 R/h)
d. 0.28 Gy/h (28 R/h)
Q. 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. 1.6 minutes
b. 4.4 minutes
c. 6.4 minutes
d. 8.8 minutes
Q. A radiographic exposure with 3700 GBq (100 Ci) source of Ir-192 using source to filmdistance 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. 0.472 Gy/h (47.2R/h)
b. 0.118 Gy/h (11.8 R/h)
c. 0.029 Gy/h (2.9 R/h)
d. 0.236 Gy/h (23.6 R/h)
Q. Radiographic equivalence factors for Inconel and 304 stainless steel are 1.4 and 1.0 respectively. What is the approximate equivalent thickness of Inconel requiring the same exposure as 1.27 cm (½ inch) thickness of 304 stainless steel?
a. 1.27 cm (0.50 inches)
b. 1.78 cm (0.70 inches)
c. 0.9 cm (0.36 inches)
d. 3.55 cm (1.40 inches)
Q. The approximate radiographic equivalence factors for steel and copper at 220 kV are 1.0 and 1.4 respectively. If it is desirable to radiograph a 1.27 cm (0.5 inch) piece of copper, what thickness of steel would require about the same exposure characteristics?
a. 1.78 cm (0.7 inches)
b. 0.9 cm (0.35 inches)
c. 3.55 cm (1.4 inches)
d. 2.54 cm (1.0 inch)
Q. 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)?
a. 75 seconds
b. 94 seconds
c. 48 seconds
d. 38 seconds
Q. Subject contrast and film contrast are the two factors that comprise radiographic:
a. Definition
b. Distortion
c. Contrast
d. Graininess
Q. ‘Film contrast’ is the inherent ability of a film to show for agiven change in film exposure.
a. No appreciable change in density
b. Graininess
c. A difference in density
d. No graininess
Q. The range of the specimen thickness that can be adequately recorded on a radiographis known as the of the radiograph.
a. Sensitivity
b. Latitude
c. Accuracy
d. Intensity
Q. Source-to-object distance, object-to-film distance, and source size are the three factorsthat control the of the radiograph.
a. Density
b. Exposure
c. Film size
d. Unsharpness
Q. The ‘multi-film’ technique may be used when one radiograph film does not haveenough to produce a satisfactory radiograph of a specimen.
a. Latitude
b. Definition
c. Graininess
d. Activity
Q. What governs the penetrating power of an X ray beam?
a. Kilovoltage
b. Time
c. Activity
d. Milliamperage
Q. The shorter the wavelength of X or gamma rays:
a. The higher their energy
b. The faster they travel
c. The smaller their penetrating power
d. The closer they are to becoming radio waves