50 Question RT quiz

1. Which is a disadvantage of using an isotope?

2. The sharpness of a radiographic image is determined by?

3. The shorter the wavelength of X or gamma rays:

4. The uneven distribution of developed grains within the emulsion of a processed X-ray film causes the subjective impression of:

5. Which of the following instruments would exhibit the best sensitivity and most likely be used to detect small leaks in a radiation barrier?

6. While using an X-ray tube for radiography, the operator wishes to increase the radiation intensity. To do so, the:

7. Films that are left between lead screens too long in a high-temperature and high-humidity atmosphere may:

8. A qualitative term often used to indicate the size of the smallest detail which can be seen in a radiograph is:

9. Because of geometrical factors such as source size, source-to-specimen distance and specimen- to-film distance, there can be a lack of perfect sharpness at the edges of indications which is referred to as the:

10. The most effective method for handprocessing large numbers of radiographs is:

11. With respect to quality, what three factors must be considered in selecting a source-to-film distance?

12. Cobalt-59 becomes Cobalt-60 when it is placed in a nuclear reactor where it captures:

13. An X-ray procedure requires an exposure of 5mA minutes at a source-to-film distance of 1000mm. If the source-to-film distance is decreased to 500mm, the exposure required to achieve the same density would be:

14. The specific activity of an isotopic source is usually measured in:

15. The range of thickness over which densities are obtained that are satisfactory for interpretation is a measure of the:

16. Almost all gamma radiography is performed with:

17. In an X-ray tube, the filament and focusing cup are the two essential parts of the:

18. 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:

19. The ability of a material to block or partially block the passage of X-rays and gamma rays is referred to as:

20. The quantitative measure of film blackening is referred to as:

21. Which of the following X-ray generators would produce the narrowest cone of X-radiation?

22. Lead screens are used for almost all exposures when using:

23. One method of reducing radiographic contrast is to:

24. When sharp, black, bird-foot shaped marks which are known not to correspond with any discontinuities appear at random on radiographs, they are probably caused by:

25. All other factorsbeing equal, which two types of film would give the sharpest images?

26. The primary function of a darkroom is the protection of sensitive film by control of:

27. A special form of scatter due to X-ray diffraction effects in a specimen with large grains will result in:

28. Images of discontinuities close to the source side of the specimen become less clearly defined as:

29. The amount of unsharpness or blurring of a radiograph is:

30. The quantity of radiation striking a unit area of film:

31. The kilovoltage applied to an X-ray tube affects:

32. The reason the exposure time must be increased by a factor of four when the source-to-film distance is doubled is:

33. Subject contrast is affected by:

34. The interval between the time a film is placed in a fixer solution and the time when the original diffuse, yellow miliciness disappears is known as:

35. The absorption of gamma-rays from a given source when passing through a metal is due to:

36. Film selection for an X-ray exposure depends on:

37. A lead sheet containing a pinhole may be placed halfway between the X-ray tube and the film to:

38. The load that can be handled by an X-ray tube focal spot is governed by:

39. Filters placed between the X-ray tube and specimen tend to reduce scatter radiation undercutting the specimen:

40. The mottling caused by diffraction when radiographing fairly large-grained metallic specimens can be reduced and in some cases eliminated by:

41. The slope of the characteristic curve of a radiographic film is called:

42. The most commonly used target material in an X-ray tube is:

43. The specific activity of radioactive isotopes is measured in:

44. Which of the following technique variables is most commonly used to adjust subject contrast?

45. Two factors which greatly affect the suitability of the target material in an X-ray tube are:

46. While using an Isotope the operator may vary.

47. Isotopes are sheilded in cameras made from?

48. The developer solution is:

49. What is one requirement that every radiographic film base must have?

50. A light image of a backing "B" on a processed radiograph is probably caused by:

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