Radiology Mid Exam

40 Questions | Total Attempts: 1463

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Radiology Quizzes & Trivia

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Questions and Answers
  • 1. 
    The "p" in kVp stands for
    • A. 

      Percentage

    • B. 

      Parallel

    • C. 

      Peak

    • D. 

      Punitive

    • E. 

      Paired

  • 2. 
    In the x-ray tubehead , " dissipate the heat away from tungesten target " function of :
    • A. 

      Molybdenum cup

    • B. 

      Tubehead seal

    • C. 

      Copper stem

    • D. 

      Insulating oil

  • 3. 
    Which type of x-ray account for 70%of all the x-ray energy produced at the anode ?
    • A. 

      Characteristic radiation

    • B. 

      General radiation

    • C. 

      Primary radiation

    • D. 

      Compton scatter

    • E. 

      Coherent scatter

  • 4. 
    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

  • 5. 
    Type of film holders used during root canal procedures :
    • A. 

      XCP Bite-Block

    • B. 

      Snap-A-Ray

    • C. 

      Masel Orthodontics

    • D. 

      EndoRay

    • E. 

      Uni-bite

  • 6. 
    The 8-inch PID is less effective than 16-inch PID in reducing radiation exposure of the patient 
    • A. 

      True

    • B. 

      False

  • 7. 
    An example of an electro-magnetic radiation is
    • A. 

      Alpha rays

    • B. 

      Beta rays

    • C. 

      Cathode rays

    • D. 

      Gamma rays

  • 8. 
    " Cathode " in a X-ray tube is 
    • A. 

      A)- source of electrons

    • B. 

      B)- A target

    • C. 

      C)- Negatively charged

    • D. 

      A and c

    • E. 

      All of the above

  • 9. 
    Which is the purpose of dental x-ray machine filtration ?
    • A. 

      Decrease beam intensity

    • B. 

      Reduce the size of the x-ray beam

    • C. 

      Regulate the shape of the x-ray beam

    • D. 

      Eliminate low-energy photons

  • 10. 
    Which one of the following is  characteristic of rectangular PID :
    • A. 

      A)-appears as a closed , pointed plastic cone

    • B. 

      B)-most effective in reducing patient exposure

    • C. 

      C)-no longer used in dentistry

    • D. 

      D)-produce scatter radiation

    • E. 

      A and c

  • 11. 
    All dental x-ray machines manufactured after :
    • A. 

      1984

    • B. 

      1874

    • C. 

      1947

    • D. 

      1974

  • 12. 
    Double-ended instrument that hold the film between two plastic grips : 
    • A. 

      Stabe Bite-Block

    • B. 

      Uni-bite

    • C. 

      Snap-A-ray film holder

    • D. 

      Orthophos XGPlus

    • E. 

      Non of the above

  • 13. 
    A form of energy carried by waves or a stream of particles:
    • A. 

      Radiology

    • B. 

      Radiograph

    • C. 

      Dental Radiograph

    • D. 

      Radiation

    • E. 

      X-RAY

  • 14. 
    The primary parts of an atom are:
    • A. 

      Proton, nutrino, electron

    • B. 

      Proton, electron, gamma ray

    • C. 

      Photon, electron, neutron

    • D. 

      Proton, electron, neutron

  • 15. 
    Most of the energy of the electrons from the cathode is converted to :
    • A. 

      X-rays

    • B. 

      Scatter

    • C. 

      Heat

    • D. 

      Primary beam

  • 16. 
    Name the following intraoral radiograph
    • A. 

      Periapical radiograph

    • B. 

      Bitewing radiograph

    • C. 

      Occlusal radiograph

    • D. 

      Biteblock radiograph

  • 17. 
    Which of the following describe Lead foil sheet :
    • A. 

      Protect the film from exposure to light and saliva

    • B. 

      Give the film greater sensitivity to X-radiation

    • C. 

      Protect film from backscattered (secondry) radiation

    • D. 

      Contributes to rigidity of packet

    • E. 

      Two of the above is right

    • F. 

      Non of the above

  • 18. 
    Most frequently used bite-wing film is :
    • A. 

      The standard film ( size2 periapical film )

    • B. 

      Size 4 bite-wing film

    • C. 

      The film that used to examine the posterior teeth in adults

    • D. 

      The size 3 film

    • E. 

      Non of the above

  • 19. 
    The correct  relations between crystal size , film speed and image details is :
    • A. 

      Large crystal > high speed > more details

    • B. 

      Large crystal > low speed > less details

    • C. 

      Small crystal >low speed > less details

    • D. 

      Small crystal > low speed > more details

  • 20. 
    A dental patient has thick soft tissues and dense bone , to compensate for this increase in subject thickness and to provide an image of diagnostic density , the dental radiographer may do all of the following except  :
    • A. 

      Increase the mA

    • B. 

      Decrease focal spot size

    • C. 

      Increase exposure time

    • D. 

      Increase kVp

  • 21. 
    Decrease  the operating kilovoltage peak will cause :
    • A. 

      An increase in density ; the image appears darker

    • B. 

      An increase in density ; the image appears lighter

    • C. 

      A decrease in density ; the image appears darker

    • D. 

      A decrease in density ; the image appears lighter

  • 22. 
    The heart of the x ray generating system is 
    • A. 

      Position indicating device PID

    • B. 

      Lead collimator

    • C. 

      Metal housing

    • D. 

      Transformer

    • E. 

      X ray tube

  • 23. 
    Which of the following statement is true ?
    • A. 

      Small lymphocytes consider one of the least susceptible to ionizing radiation

    • B. 

      The last event in the sequence of radiation injury is latent period

    • C. 

      Direct theory of radiation injury suggests that cell damage result when ionizing radiation directly hits critical area

    • D. 

      Long term effects are seen with small amount of radiation absorbed in short period

  • 24. 
    Conventional calcium tungeston screen require less x ray expure than do rare earth screen 
    • A. 

      True

    • B. 

      False

  • 25. 
    The SI unit for measuring radiation exposure by determining the amount of ionization that occurs in the air is termed :
    • A. 

      Gray ( Gy )

    • B. 

      Coulombs per kilogram ( C/Kg )

    • C. 

      Sievert ( Sv )

    • D. 

      Roentgen ( R )

    • E. 

      Radiation absorbed dose ( rad )