Radiology 5

35 Questions | Total Attempts: 343

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Radiology Quizzes & Trivia

Questions and Answers
  • 1. 
    Which of the following materials is most resistant to x radiation?
    • A. 

      Copper

    • B. 

      Molybdenum

    • C. 

      Tungsten

    • D. 

      Lead

    • E. 

      Aluminum

  • 2. 
    The intensity of the beam is affected by the
    • A. 

      Kilovolt peak

    • B. 

      Milliamperage

    • C. 

      Exposure time

    • D. 

      Focal film distance

    • E. 

      All of the above

  • 3. 
    How many times per second is the polarity reversed in a dental xray machine operating on an alternating current?
    • A. 

      30

    • B. 

      15

    • C. 

      60

    • D. 

      45

  • 4. 
    For x ray timers calibrated in impulses how many impulses are there in a second?
    • A. 

      10

    • B. 

      30

    • C. 

      60

    • D. 

      120

    • E. 

      15

  • 5. 
    In 16 inch cylinder is used in the paralleling technique to
    • A. 

      Reduce secondary radiation

    • B. 

      Avoid magnification of the image

    • C. 

      Avoid distortion of the image

    • D. 

      Avoid superimposition of anatomic structures

    • E. 

      Facilitate correct vertical angulation of the position indicating device pid

  • 6. 
    Use of a kilovolt peak between 45 65 profuces
    • A. 

      Scatter radiation

    • B. 

      Fogging

    • C. 

      A blurred image

    • D. 

      An underexposed film

    • E. 

      None of the above

  • 7. 
    The difference in degrees of blackness on a radiograph is called
    • A. 

      Density

    • B. 

      Tone

    • C. 

      Contrast

    • D. 

      Fogging

    • E. 

      Shades

  • 8. 
    A long FFD is desirable because
    • A. 

      More radiation is absorbed by the tissues

    • B. 

      The resulting radiation is more penetrating

    • C. 

      More soft radiation strikes the object

    • D. 

      The central rays of the primary beam are less divergent

    • E. 

      Overexposure rarely occurs

  • 9. 
    Radiographs should always be viewed
    • A. 

      In a well lit room

    • B. 

      On a viewbox

    • C. 

      In the operatory

    • D. 

      By holding them up to a celling light

    • E. 

      Using hight from a window

  • 10. 
    If the intensity of a beam of radiation is 12 at a point 12 inches from the target the intensity of the beam at 24 inches is
    • A. 

      2

    • B. 

      3

    • C. 

      4

    • D. 

      5

    • E. 

      6

  • 11. 
    The best way to clean the intensifying screens in extraoral cassettes is with
    • A. 

      Detergent

    • B. 

      Disinfectant solution

    • C. 

      Cold sterillizing solution

    • D. 

      Soapy water

    • E. 

      A wire brush

  • 12. 
    Film fog occurs when all or part of a radiograph is darkened by
    • A. 

      An imbalance or exhaustion of processing solutions

    • B. 

      A light leak

    • C. 

      Improper safelighting

    • D. 

      Improper safelilghting

    • E. 

      All of the above are potential sources

  • 13. 
    Which of the following statement is false concerning film duplication?
    • A. 

      The films to be duplicated are in close contact with the duplicating film.

    • B. 

      The shiny side of the film is the nonemulsion side

    • C. 

      If less film density is needed on the duplicate radiograph the exposure time is shortened.

    • D. 

      The raised portion of the orientation dot faces toward the light source

    • E. 

      The radiographs being duplicated should be removed from their respective mounts.

  • 14. 
    Flexible cassettes are
    • A. 

      Not used because of cracking of the emulsion

    • B. 

      Are used in all panoramic units

    • C. 

      Are used in some panoramic units

    • D. 

      Are used for lateral oblique projections only

    • E. 

      None of the above

  • 15. 
    Intraoral film packets must be
    • A. 

      Resistant to salivary seepage

    • B. 

      Flexible

    • C. 

      Light tight

    • D. 

      Easy to open in the darkroom

    • E. 

      All of the above

  • 16. 
    To what does the term film speed refer?
    • A. 

      The developing time needed

    • B. 

      Sensitivity to x radiation

    • C. 

      Half life

    • D. 

      Degree of blackness on the exposed radiograph

    • E. 

      Shelf life

  • 17. 
    The advantage of a film that has emulsion on both sides is that
    • A. 

      The film requires less radiation exposure

    • B. 

      The image produced is less distorted

    • C. 

      The film has less sensitivity to radiation

    • D. 

      Processing solutions work better

    • E. 

      The film is easier to mount

  • 18. 
    Which of the following film sizes is considered to be standard adult film?
    • A. 

      Size#0

    • B. 

      Size#1

    • C. 

      Size#2

    • D. 

      Size#3

    • E. 

      Size#4

  • 19. 
    Nonscreen film is routinely used in extraoral radiography
    • A. 

      True

    • B. 

      False

  • 20. 
    The advantage of a film that has emulsion on both sides is that
    • A. 

      The film requires less radiation exposure

    • B. 

      The image produced is less distorted

    • C. 

      The film has less sensitivity to radiation

    • D. 

      Processing solutions work better

    • E. 

      The film is easier to mount

  • 21. 
    The intensifying screen that emits blue light and must be used with film that is sensitive to blue light is a
    • A. 

      Nonlight screen

    • B. 

      Calcium tungstate screen

    • C. 

      Rare tungstate screen

    • D. 

      Rare earth screen

    • E. 

      Phosphor calcium screem

  • 22. 
    The device that converts x ray energy into visible light is called a(n)
    • A. 

      Cassette holder

    • B. 

      Step down transformer

    • C. 

      Intensitying screen

    • D. 

      Nonscreen film

    • E. 

      Screen film

  • 23. 
    Intraoral film packets must be
    • A. 

      Resistant to salivary seepage

    • B. 

      Flexible

    • C. 

      Light tihgt

    • D. 

      Easy to open in the darkroom

    • E. 

      All of the above

  • 24. 
    If the intensitying screens are not in perfect contact with the film which of the following will occur?
    • A. 

      The screen may be damaged

    • B. 

      The film may be damaged

    • C. 

      There will be a light leak

    • D. 

      There will be a loss of image sharpness

    • E. 

      A thin film will result

  • 25. 
    What is the major advantage in using the fastest speed film and high kilovolt peak?
    • A. 

      It increases film density

    • B. 

      It increases film contrast

    • C. 

      It produces a clearer image

    • D. 

      It reduces the radiation exposure to the patient

    • E. 

      It makes film easier and faster to develop