30 Question RT quiz

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

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

3. Subject contrast is affected by:

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

5. 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:

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

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

8. Subject contrast is affected by:

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

10. Two isotopic sources of a given strength have two different specific activity values. The source with the higher specific activity value will:

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

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

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

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

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

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

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

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

19. Almost all gamma radiography is performed with:

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

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

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

23. One method of reducing radiographic contrast is to:

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

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

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

27. 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:

28. While using an Isotope the operator may vary.

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

30. X-ray films with large grain size:

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