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Practice from Test I

Barbara Pelletier


Answer the questions below and then click "submit" to send your answers.

  1. Which of the principles of shadowcasting are not met in paralleling?
  2. Your answer:
    parallel relationship between object and film
    long distance between source and object
    small distance between object and film
    x-rays directed at 90 degrees to object and film


  3. In bisecting the angle, which of the following principles of shadowcasting is met
  4. Your answer:
    parallel relationship between object and film
    long distance between source and object
    small distance between object and film
    x-rays directed at 90 degrees to object and film


  5. The discovery of x-rays is attributed to _____________.
  6. Your answer:
    Willliam Rollins
    Wilhelm Roentgen
    Otto Walkoff
    William Jennings


  7. The "father of the science of radiation protection" is:
  8. Your answer:
    William Rollins
    Wilhelm Roentgen
    Otto Walkoff
    William Jennings


  9. Who is allowed to diagnose a dental x-ray?
  10. Your answer:
    the dentist
    the dentist and hygienist
    the dentist, hygienist, and dental assistant
    anyone who has taking a dental radiology course


  11. A fuzziness around an image is called:
  12. Your answer:
    radiolucent
    radiopaque
    penumbra
    umbra


  13. Paralleling is recommended rather than bisecting because:
  14. Your answer:
    the image is better
    it is more comfortable for the patient
    it is faster
    it uses less exposure time


  15. The ability of x-rays to penetrate some objects better than others is called:
  16. Your answer:
    unilateral absorption
    differential absorption
    attenuation
    polychromatic


  17. What catagory of radiation do x-rays belong?
  18. Your answer:
    bremmshrahlen
    characteristic
    electromagnetic
    particulate


  19. To increase vertical angulation, how do you point the pid?
  20. Your answer:
    downward
    upward
    to the right
    to the left


  21. Interproximal decay that has not reached the dentin is termed:
  22. Your answer:
    incipient
    halted
    progressive
    recurrent


  23. Which of the follwing is not a correct property of x-rays?
  24. Your answer:
    they have a negative charge
    they have no mass nor weight
    they travel in wave form at the speed of light
    they are invisible


  25. Which of the following is detectable from x-rays?
  26. Your answer:
    periodontal disease
    caries
    tumors and cysts
    all of the above


  27. Which of the following is located on the mandibular arch?
  28. Your answer:
    mental foramen
    incisive foramen
    inverted "Y"
    anterior nasal spine


  29. Which landmark do we use for the molars?
  30. Your answer:
    ala of the nose
    outer canthus of the eye
    inner canthus of the eye
    ala tragus line


  31. The advantage of using a long cone are: 1. increased contrast 2. increased sharpness 3. reduced magnification 4. reduced radiation exposure
  32. Your answer:
    1 and 2
    1 and 3
    2 and 3
    2 and 4


  33. What does the lead foil do in the film packet?
  34. Your answer:
    prevent backscatter from reaching
    absorb radiation that would exit the patient's face
    prevent light from exposing the film
    a and b
    a and c


  35. Occlusal caries show up in the early stages on an x-ray.
  36. Your answer:
    TrueFalse


  37. Interproximal caries appear cup shaped and root caries appear triangular shaped.
  38. Your answer:
    TrueFalse


  39. Radiopaque images are white to light gray and radiolucent images are black to dark gray
  40. Your answer:
    TrueFalse



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