50 Question RT quiz

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

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

3. The velocity of electrons striking the target in an X-ray tube is a function of:

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

5. Which of the following types of radiation is commonly used in radiographic testing?

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

7. The most common way of cooling the anode of a high-power X-ray tube is:

8. While using an Isotope the operator may vary.

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

10. Which of the following isotopes is commonly used for radiographic purposes:

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

12. Thin sheets of lead foil in intimate contact with X-ray film during exposure increase film density because:

13. A monochromatic X-ray beam:

14. The specific activity of Cobalt-60 depends on:

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

16. The "density" of a radiographic image refers to:

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

18. For a given change in the radiation exposure, film contrast is the inherent ability to show:

19. A curve relating density with the logarithm of exposure or of relative exposure is called:

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

21. What is the primary difference between X-rays and gamma rays of the same energy?

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

23. The emulsion or image layer of the unexposed film contains grains of

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

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

26. 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:

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

28. The greys and blacks in a radiographic image are composed of:

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

30. Almost all gamma radiography is performed with:

31. 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:

32. In million-volt radiography, filtration at the tube:

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

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

35. Which of the following isotopes has the longest half-life?

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

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

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

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

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

41. Constant agitation of the developer during the development process by means of mechanical stirrers or circulating pumps may:

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

43. Besides serving as a filter, screens of high atomic number, such as lead and lead antimony, also:

44. The activity of the fixer diminishes after being used for a period of time because:

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

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

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

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

49. One method of reducing radiographic contrast is to:

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

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