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Radiography Testing Exam – Level II
1. Unexposed X-ray film is comprised of a plastic, transparent base coated with an emulsion
containing radiation-sensitive particle known as:
A. Silver halide grains
B. Metalic silver crystals
C. Both A and B
D. Silver Bromide grains
2. Which of the following types of intensifying screens are used in industrial radiography?
A. Silver Bromide
B. All of the above
C. Lead & Fluorescent
D. Silver halide
3. A term which refers to the smallest detail visible in a radiograph is called:
A. Radiographic contrast
B. Radiographic sensitivity
C. Film contrast
D. Subject contrast
4. The adjustment of tube current in conventional X-Ray tube circuits is made by:
A. Inserting resistance in the anode lead
B. Adjusting the target-to-cathode distance
C. Opening the shutter on the X-Ray tube port
D. Adjusting the filament heating current
5. A densitometer is an instrument that measures:
A. Radiographic sensitivity
B. Radiographic resolution
C. Radiographic density
D. Radiographic contrast
6. Film intensifying screens are normally used to:
A. Decrease exposure time
B. Increase grain size
C. Shield film from stray light
D. All of the above
7. Which of the following isotopes has the longest half-life?
A. Tm- B. Co- C. Ir- D. Cs-
8. X-ray tube has intensity 5 mA at the same voltage and exposure was 12 min. what will be
the new time of exposure if the intensity 10 mA.
A. 6
B. 8
C. 10
D. 4
9. Calculate geometric unsharpness for the following conditions: Source size = 0.5x1.5 mm ;
FDD = 700 mm; test piece thickness = 25 mm
A. 0.
B. 2.
C. 0.
D. 0.
10. An X-Ray tube with a small focal spot is considered better than one with a large focal
spot when it is desired to obtain:
A. Greater penetrating power B. Better definition C. Greater film density D. Less contrast
11. X rays are produced by:
A. none of the above B. Radioactive isotopes C. The rapid of electrons D. Ultraviolet radiation of unstable atoms
12. Inverse Square Law is useful in radiography because it indicates how the radiation
intensity is affected by:
A. Radioactive decay B. None of the above C. Distance from the source D. The size of the source
13. The target of an X-ray tube is often made out of tungsten becuase:
A. It have very high thermal conductivity which makes it easy to cool B. It has a high atomic mass which will result in more X-rays being generated due to atomic particle interactions C. None of the above D. It is an inexpensive material that is easy to machine
15. The penetrating power of an X ray machine is indicated by:
A. Tube voltage B. Anode current C. Filament current D. Milliamperage
23. A filter is placed
A. Around the specimen B. Between the source and the specimen C. Between the specimen and the film D. Behind the film
24. The normal range of steel that is radiographed using Ir-192 is:
A. 5 mm–20 mm B. 12 mm – 75 mm C. 0.5 mm – 5 mm D. 75 mm – 150 mm
25. A term which refers to the sharpness of the radiographic image is:
A. Geometric sharpness B. Shadow effect C. Definition D. Image Quality
26. we have Co-60 with (100 curie) , calculate the now source strength if you know the
source was passed seven years.
A. 40
B. 30
C. 20
D. 35
27. The ability of a material to block or partially block the passing of X-Rays and gamma rays
is called:
A. Absorption B. Latitude C. Absolution D. contrast
28. The film density to which require to viewed the film in viewer dependent upon:
A. The speed of the film B. The graininess of the film C. The quality of the viewer D. The variation in thickness of the specimen
29. We have thickness 21 mm, how many Ug acceptable according to ASME sec. V Artical 2
A. 0.
B. 0.
C. 0.
D. 0.
30. Screens should be:
A. In direct contact with the film B. Separated from the film by its cardboard backing C. Separated from the film by at least 3.125 mm
D. Separated from the film by a sheet of clean white paper
31. Ionizing radiation can be used in industrial radiography because the health hazards:
A. Are minimized through controls and procedures B. Have been eliminated with controls and procedures C. Are being ignored D. Are worth the risk
32. Lowering the energy of the radiation used to produce a radiograph will generally result
in:
A. Higher geometric unsharpness B. All of the above C. A Longer exposure time D. Less density
33. A low density (white) image of the letter ‘B’ on a radiographic film would probably be
caused by:
A. Excessive back-scatter B. Excessive exposure C. Under exposure D. Insufficient back-scatter
34. Most scattered radiation which adversely affects the radiographic image quality
originates:
A. From the lead intensifying screens B. From other nearby objects C. From the test piece itself D. From floors and walls adjacent to the test piece
35. The focal spot size of an X ray machine must be known in order to determine:
A. Exposure time B. The geometric unsharpness C. Required mA setting D. Kilovoltage peak output
36. Which of the following is an isotope not artificially produced for industrial use:
A. Ra- B. Co- C. All of the above D. Ir-
37. When the intensity of x-radiation will be high
A. distance between the source and object as small as practical B. The test specimen should be moved as far as from the film C. e. The large focal spot should be used D. The exposure time will be decreased
45. An advantage of a gamma ray source is:
A. All of the above B. Power not required C. Radiation may be turned on or off at will D. Less shielding is required than for X ray
46. X-rays and Gamma rays have significant penetrating power due to their:
A. Wide range of wavelengths B. Short wavelength C. Long wavelength D. Medium wavelength
47. The most commonly used target material in an X-Ray tube is:
A. Carbide B. Carbon C. Copper D. Tungsten
48. The main purpose of the X-Ray generator controls on the equipment is to:
A. Enable the operator to obtain the intensity, quality, and duration of exposure desired B. Allow the operator to adjust Film Focal Distance remotely C. Change alternating current to increase X-Ray intensity D. Maintain the direction and width of the X-Ray beam
49. Developer solution should be discarded when the quantity of replenished added equals:
A. The original quantity of developer B. 2-3 times the original quantity of developer C. 5-6 times the original quantity of developer D. 10 times the original quantity of developer
50. X-rays and Gamma rays have significant penetrating power due to their:
A. Long wavelength with high energy B. Long wavelength with low energy C. Short wavelength wit low energy D. Short wavelength wit high energy
51. X-rays and Gamma rays:
A. Always travel in a straight line B. None of the above C. Can be influenced by a magnetic field D. Can be influenced by an electrical field
52. Generally, X ray intensity is changed by changing the:
A. Atomic number of the anode
B. Tube current of the unit
C. Atomic weight of the cathode
D. Supply voltage to the unit
53. When using geometric unsharpness to produce a radiograph, the penumbra will be
reduced by:
A. More X-ray energy B. A longer exposure C. A smaller source spot size D. A faster film speed
54. With respect to quality, what three factors must be considered in selecting a source-to-
film distance?
A. Source size, specimen thickness, geometric unsharpness B. Source activity, type of film, type of screens C. Source size, source activity, specimen-to-film distance D. Source activity, size of film, thickness of material
55. Collimators are used to:
A. Direction radiation beam spread B. Decrease film speed C. Increase film latitude D. Filter the radiation beam
56. quantitative measure of film blackening is referred to as:
A. Definition B. Photographic density C. Film contrast D. Radiographic contrast
57. An effect of scattered radiation is to:
A. Decrease film density B. All of the above C. Decrease required exposure time D. Diminish contrast, detail and clarity of radiographic image
58. The purpose of circulating oil in some types of X-Ray tubes is to:
A. Decrease the need for high current B. Dissipate heat C. Lubricate moving parts D. Absorb secondary radiation
59. On a film radiograph, an area of high density will appear:
A. Darker than the surrounding area B. Less defined than the sorrounding area C. More defined than the surrounding area D. Lighter than the surrounding area
60. We have thickness 15 mm and need to use IQI wire type and need to putting the IQI in
source size. which IQI set must by used according to table T-276 in ASME sec. V article 2,
A. Set D B. Set A C. Set C D. Set B
68. Almost all gamma radiography is performed with:
A. Tm- B. Ir-192 or Co- C. Radium D. Natural isotopes
69. Radiographic film speed can be increased by using
A. all of above B. A double emulsion gelatin versus a single emulsion gelatin C. A higher mA setting D. A lower mA setting
70 What is the most important factor in determining the archival quality of radiographic
film?
A. Degree of removal of developer residues during washing B. Film density C. Degree of removal of fixer residues during washing D. IQI Image quality
71. We have Two isotropic sources (same material) they given strength have two different
specific activity values. The source with the smaller physical size will:
A. All of the above B. Enhance the sharpness C. Produce harder gamma rays D. Have a shorter half-life
72. When using geometric unsharpness to produce a radiograph, the penumbra will be
reduced by:
A. A faster film speed B. More X-ray energy C. A smaller source spot size D. A longer exposure
73. Which type of film would exhibit the biggest coarse grain?
A. Medium speed film B. Fast speed film C. Slow speed film D. No difference in the grain sizes
