CDC Practice Questions On Dental Radiography! Quiz

58 Questions | Total Attempts: 261

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CDC Quizzes & Trivia

What we have here are some CDC practice questions on dental radiography! There are different ways that one can look for any issues on one's teeth, and carrying out an x-ray ensures that you get a deeper view of what's wrong with a patient's teeth. Do you know how to rake radiographs and read them? Do take the quiz and get to find out.


Questions and Answers
  • 1. 
    (801) Which of the following dental conditions could not be diagnosed through the x-ray examination?
    • A. 

      Dental caries

    • B. 

      Impacted teeth

    • C. 

      Acute gingivitis

    • D. 

      Periapical abscesses

  • 2. 
    (801) Compared to visible light, the speed of x-rays is
    • A. 

      About the same

    • B. 

      Somewhat slower

    • C. 

      Considerably faster

    • D. 

      Considerably slower

  • 3. 
    (801) What effect of x-rays varies inversely with the wavelength?
    • A. 

      Biological

    • B. 

      Florescent

    • C. 

      Penetrating

    • D. 

      Photographic

  • 4. 
    (801) Which one of the following factors determines the penetrating power of x-rays?
    • A. 

      Ionization

    • B. 

      Wavelength

    • C. 

      Florescence

    • D. 

      Milliamperage

  • 5. 
    (802) Which of the following is a principal part of the cathode in the x-ray tube?
    • A. 

      Copper stem

    • B. 

      Copper head

    • C. 

      Tungsten target

    • D. 

      Tungsten filament

  • 6. 
    (802) What is the function of the copper head and stem of the positive terminal of the x-ray tube?
    • A. 

      Dissipate heat

    • B. 

      Reflect x-rays

    • C. 

      Produce x-rays

    • D. 

      Warm the tube head

  • 7. 
    (802) The voltage across the anode and cathode of an x-ray tube is measured in
    • A. 

      Kiloamps

    • B. 

      Kilovolts

    • C. 

      Milliavolts

    • D. 

      Milliamperes

  • 8. 
    (802) Which of the following would be typically descriptive of x-rays produced by low voltage?
    • A. 

      No penetration

    • B. 

      Longer wavelength and low penetration

    • C. 

      Short wavelength and high penetration

    • D. 

      Extremely hazardous due to its shorter wavelength

  • 9. 
    (802) What effect is responsible for scatter radiation generated during the radiographic process?
    • A. 

      Penetrating

    • B. 

      Compton

    • C. 

      Secondary

    • D. 

      Ionization

  • 10. 
    (802) It is wise to question x-ray patients about any recent exposures they may have had in order to protect them from the x-rays'
    • A. 

      Ionization effect

    • B. 

      Florescent effect

    • C. 

      Cumulative effect

    • D. 

      Penetrating effect

  • 11. 
    (803) When exposing x-ray film, which of the following safety practices is not a concern to you as an operator?
    • A. 

      Stand behind a shielded protective barrier

    • B. 

      Wear a leaded apron when taking multiple exposures

    • C. 

      Hold the film in the patient's mouth during the exposure

    • D. 

      Keep the door of the exposure room closed when radiographs are being exposed

  • 12. 
    (803) What is the purpose of the aluminum disk located where the x-rays exit the tube head?
    • A. 

      Servers to intensify the total quantity of radiation

    • B. 

      Limits the diameter of the useful beam to less than 3 inches

    • C. 

      Absorbs poor quality radiation that would normally be absorbed by the patient

    • D. 

      Increases the wavelength of the existing radiation, and decreases the exposure time

  • 13. 
    (803) The purpose of collimation as a built in safety feature of modern x-ray equipment is to
    • A. 

      Reduce operating costs

    • B. 

      Absorb poor quality radiation

    • C. 

      Increase the quality of the radioactive beam

    • D. 

      Restrict the x-ray beam to only the area of interest

  • 14. 
    (804) What is one type of image receptor for digital radiography?
    • A. 

      Image plate

    • B. 

      Occlusal

    • C. 

      Periapical

    • D. 

      Silicon chip

  • 15. 
    (804) What is placed on the image scanner for processing?
    • A. 

      Image plate

    • B. 

      Occlusal film

    • C. 

      Periapical film

    • D. 

      Charged-coupled device

  • 16. 
    (804) What is a disadvantage of digital radiography?
    • A. 

      Images cannot be altered

    • B. 

      Charged coupled device is very sturdy

    • C. 

      Digital radiography systems are expensive

    • D. 

      All dental clinics have the same software

  • 17. 
    (805) Which type of dental x-ray film is used to reveal interproximal or recurrent carious lesions of the teeth
    • A. 

      Occlusal

    • B. 

      Periapical

    • C. 

      Bitewing

    • D. 

      Pediatric

  • 18. 
    (805) The reason for two films in the occlusal film packet is to allow for
    • A. 

      Different developing times

    • B. 

      A range of different sizes from child to adult

    • C. 

      Superimposition of an embossed dot over the proper tooth

    • D. 

      Two x-rays, one for the maxillary teeth, the other for the mandibular teeth

  • 19. 
    (805) Approximately how much radiation is received by a patient during a panoramic examination as compared to a conventional full-mouth series?
    • A. 

      One-tenth

    • B. 

      One-half

    • C. 

      The same

    • D. 

      Twice as much

  • 20. 
    (805) Which of the following factors normally limits the panoramic X-ray technique to full-mouth surveys?
    • A. 

      Size factor

    • B. 

      Cost factor

    • C. 

      Time factor

    • D. 

      Distortion factor

  • 21. 
    (806) Enlargement of the image is reduced using the paralleling technique compared to the bisecting technique because the focal-film distance is
    • A. 

      Decreased to approximately 8 inches

    • B. 

      Increased to approximately 12 inches

    • C. 

      Increased to approximately 16 to 20 inches

    • D. 

      Decreased to approximately 16 to 20 inches

  • 22. 
    (806) What effect does increasing the focal film distance have on the x-ray image?
    • A. 

      There is no change

    • B. 

      The image is distorted

    • C. 

      Enlargement is reduced

    • D. 

      X-ray image is greatly enlarged

  • 23. 
    (806) For posterior exposures using the X-tension C-one P-aralleling (X-C-P) instrument, how should the film be inserted into the slot?
    • A. 

      Vertically

    • B. 

      Horizontally

    • C. 

      With an upward motion

    • D. 

      Vertically, using a downward motion

  • 24. 
    (806) What is the position of the film for proper parallelism?
    • A. 

      Away from the midline

    • B. 

      Towards the midline

    • C. 

      Facing the opposite arch

    • D. 

      Towards the opposite arch

  • 25. 
    (807) In what position should the long axis of the film packet be positioned for exposures of the incisors and cuspids?
    • A. 

      Vertically in the maxillary region

    • B. 

      Horizontally in the maxillary and mandibular region

    • C. 

      Vertically in the maxillary region; horizontally in the mandibular region

    • D. 

      Horizontally in the maxillary region; vertically in the mandibular region

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