50 Question RT quiz

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

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

3. 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:

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

5. In X-ray radiography, alternating current must be changed to pulsating direct current in order to satisfy the need for unidirectional current. This change may be accomplished by

6. The primary form of energy conversion when electrons strike a target in an X-ray tube results in the production of:

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

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

9. The range of specimen thicknesses that can be adequately recorded on the radiograph is referred to as the:

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

11. 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:

12. Almost all gamma radiography is performed with:

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

14. Subject contrast is affected by:

15. A 1,000 kVp X-ray machine used in conjunction with a lead foil screen has an approximate practical thickness limit of:

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

17. A general rule governing the application of the geometric principles of shadow formation states that:

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

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

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

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

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

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

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

25. A monochromatic X-ray beam:

26. Subject contrast is affected by:

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

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

29. 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:

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

31. Of the following, the source providing the most penetrating radiation is:

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

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

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

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

36. The main factor that determines the penetrating ability of an X-ray beam is?

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

38. X-ray films with large grain size:

39. Isotopes are sheilded in cameras made from?

40. The main purpose of the X-ray generator controls on the equipment is:

41. In certain cases it may be advantageous to pack lead shot around a specimen. The purpose for doing this is:

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

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

44. Low voltage X-ray tubes are generally fitted with windows made of:

45. The speed at which X and gamma rays travel is

46. The degree of concentration of the radioactive material in a gamma-ray source is referred to as:

47. A device which is basically a combination of magnet and transformer designed to guide and accelerate electrons in a circular orbit to very high energies is called a:

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

49. 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:

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

Login:

Username:
Password:
Not a member? Sign up | Forgot password?

Featured Ads

LIKE US ON FACEBOOK

MOST COMMENTED ON THIS MONTH

  • No Comments

Latest GOOGLE Headlines

LATEST BBC Headlines

LATEST NY Times Headlines

LATEST SMH Headlines

Useful Links