Oral Radiology....1

20 Questions | Total Attempts: 147

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Oral Radiology....1

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Questions and Answers
  • 1. 
    X rays produced mainly due to?
    • A. 

      Bremsstrahlung radiation

    • B. 

      Characteristic radiation

    • C. 

      Both

    • D. 

      None

  • 2. 
    Dental X rays beams are usually collimated to a circle of ?
    • A. 

      1 inch

    • B. 

      2.75 inches

    • C. 

      4 inches

    • D. 

      Any

  • 3. 
    Target Anode  is made up of?
    • A. 

      Molybdenum

    • B. 

      Copper

    • C. 

      Tungston

    • D. 

      None

  • 4. 
    Which scattering produces more film fog?
    • A. 

      Thompson scattering

    • B. 

      Photoelectric effect

    • C. 

      Compton effect

    • D. 

      Coherent scattering

  • 5. 
    All or none effect is related to?
    • A. 

      Chronic effect

    • B. 

      Deterministic effect

    • C. 

      Somatic effect

    • D. 

      Stochastic effect

  • 6. 
    Least sensitive to radiation?
    • A. 

      Bone marrow

    • B. 

      Endocrine glands

    • C. 

      Nerve tissue

    • D. 

      All

  • 7. 
    Cells with least metabolic activity?
    • A. 

      Most sensitive to radiation

    • B. 

      Least sensitive to radiation

    • C. 

      No sensitivity

    • D. 

      None

  • 8. 
    Long cone open cylinder technique is used as adjunct parelleling technique to?
    • A. 

      To prevent distortion of image

    • B. 

      To prevent elongation of image

    • C. 

      To prevent shortening of image

    • D. 

      None

  • 9. 
    Inherent character of X ray film are?
    • A. 

      Defenition contrast and resolution

    • B. 

      Defenition density resolution

    • C. 

      Defenition,contrast density

    • D. 

      All

  • 10. 
    Which of the fillowing increases radiation exposure?
    • A. 

      High KVP

    • B. 

      Low KVP

    • C. 

      High speed film

    • D. 

      All

  • 11. 
    Which one is more ionizing?
    • A. 

      X ray

    • B. 

      Beta ray

    • C. 

      Alpha ray

    • D. 

      Gamma ray

  • 12. 
    Increased Kvp leads to?
    • A. 

      Increased contrast

    • B. 

      Decreased contrast

    • C. 

      No effect on contrast

    • D. 

      None

  • 13. 
    Which leads to reduced patient exposure?
    • A. 

      Increased mA

    • B. 

      Increased Kvp

    • C. 

      Use of grids

    • D. 

      All

  • 14. 
    Tungston target is embedded in ?
    • A. 

      Molybdenum

    • B. 

      Copper

    • C. 

      Chromium

    • D. 

      Any

  • 15. 
    In characteristic radiation ?
    • A. 

      Atom is unionized

    • B. 

      Atom is ionized

    • C. 

      No effect

    • D. 

      None

  • 16. 
    Radiation dose if 7-15 GY cause?
    • A. 

      Prodrimal symptoms

    • B. 

      Mild hematopoietic systems

    • C. 

      Gastrointestinal symptoms

    • D. 

      All

  • 17. 
    Compared to round collimator rectangular collimator reduces exposure?
    • A. 

      15%

    • B. 

      30%

    • C. 

      60%

    • D. 

      45%

  • 18. 
    Mean exposure of radiation from OPG ?
    • A. 

      80mR

    • B. 

      90mR

    • C. 

      100mR

    • D. 

      300 mR

  • 19. 
    Total filtration for 70Kvp is? ?
    • A. 

      2.5 mm

    • B. 

      1.5 mm

    • C. 

      1mm

    • D. 

      2 mm

  • 20. 
    Father of radiology?
    • A. 

      Carlson

    • B. 

      Roentgen

    • C. 

      Smith

    • D. 

      Nuggler