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Oral Radiology Practice Examination

14 Questions
Oral Radiology Practice Examination

This quiz will test the dental student's understanding and knowledge of radiation physics and fundamentals of radiographic interpretation.

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Questions and Answers
  • 1. 
    An example of particulate radiation is
    • A. 

      Gamma rays

    • B. 

      X-rays

    • C. 

      Cathode rays

    • D. 

      None of the above

    • E. 

      All of the above

  • 2. 
    • A. 

      Periapical radiograph

    • B. 

      Bitewing radiograph

    • C. 

      Occlusal radiograph

    • D. 

      Biteblock radiograph

    • E. 

      Pericoronal radiograph

  • 3. 
    The cathode and anode are parts of an x-ray tube. The anode is negatively charged.
    • A. 

      The first statement is correct. The second statement is wrong

    • B. 

      The first statement is wrong. The second statement is correct

    • C. 

      Both the statements are correct

    • D. 

      Both the statements are wrong

  • 4. 
    • A. 

      Gamma rays

    • B. 

      X-rays

    • C. 

      Alpha rays

    • D. 

      Micro waves

    • E. 

      U-V radiation

  • 5. 
    Identify the intraoral radiograph shown
    • A. 

      Periapical radiograph

    • B. 

      Bitewing radiograph

    • C. 

      Maxillary midline occlusal radiograph

    • D. 

      Mandibular floor of the mouth occlusal

    • E. 

      Lateral cephalometric radiograph

  • 6. 
    The radiograph shown here is a
    • A. 

      Panoramic radiograph

    • B. 

      Occlusal radiograph

    • C. 

      Lateral oblique radiograph

    • D. 

      P-A view of the skull

    • E. 

      A-P view of the skull

  • 7. 
    In the construction of an  x-ray tube, the function of a step- down transformer is to
    • A. 

      Convert the line current of 110 volts to less than 10 milli ampeares

    • B. 

      Convert the line current of 110 volts to less than 10 volts

    • C. 

      Convert the line current of 220 volts to less than 10 volts

    • D. 

      Convert the line current of 110 volts to less than 100 amperes

  • 8. 
    In the radiographic principle, "SLOB rule, "same side movement of the object is ______ and the oppsite side movement of the object is ______. What are the missing words in the same sequence.
    • A. 

      Lateral and buccal

    • B. 

      Lingual and buccal

    • C. 

      Lingual and both sides

    • D. 

      Lateral and both sides

  • 9. 
    70 kilovolts equals
    • A. 

      70,000 volts

    • B. 

      700,000 volts

    • C. 

      70,000,000 volts

    • D. 

      7,000 volts

    • E. 

      700 volts

  • 10. 
    The "rotating anode" design in an x-ray tube limits the amount of
    • A. 

      Lighting at anode

    • B. 

      Heat production at anode

    • C. 

      Electron production at cathode

    • D. 

      Speed of electrons from cathode to anode

    • E. 

      X-rays that are produced at the anode

  • 11. 
    An example of an electro-magnetic radiation is
    • A. 

      Alpha rays

    • B. 

      Beta rays

    • C. 

      Cathode rays

    • D. 

      Gamma rays

    • E. 

      None of the above

  • 12. 
    The sharpness of the image is determined to a large extent by the
    • A. 

      Shape of the object

    • B. 

      The focal spot size

    • C. 

      The make of the x-ray machine

    • D. 

      The distance between the anode and cathode

    • E. 

      None of the above

  • 13. 
    The radiograph shown here is frequently used in Orthodontics for study of the growth and development of the head. Name the radiograph
    • A. 

      PA skull

    • B. 

      AP skull

    • C. 

      Submento vertex view

    • D. 

      Lateral Cephalometric view

    • E. 

      Panoramic view

  • 14. 
    • A. 

      Percentage

    • B. 

      Parallel

    • C. 

      Punitive

    • D. 

      Peak

    • E. 

      Paired