2015 Radiation Protection

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McCrae
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301260
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2015 Radiation Protection
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2015-04-21 23:03:43
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2015 Radiation Protection
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2015 Radiation Protection
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  1. The _______ atomic number of a material, the _____ the number of photoelectric absorption interactions will be.

    A- higher, lower
    B- 
    lower, higher
    C- higher, higher
    D- 
    lower, unaffected
    • Correct 
  2. Which regulatory agency makes recommendations for radiation safety?

    A- ICRP (International Council on Radiation Protection)
    B- 
    NCRP (National Council on Radiation Protection)
    C- 
    NAS BEIR (National Academy of Science, Advisory      Committee, Biological Effects of Ionizing Radiation)
    D- 
     

    all of the above


    Correct 

    all of the above
  3. Which of the following enforces radiation protection by making laws?

    A- 
    NRC (Nuclear Regulatory Commission)
    B- 
    ICRP (International Council on Radiation Protection)
    C- 
     NCRP (National Council on Radiation Protection)
    D- 
    United Nations Scientific Community 
    • Correct 
      NRC (Nuclear Regulatory Commission)


  4. Which of the following best describes a non-stochastic effect?



    A- A dose response relationship that demonstrates a threshold at which the severity rather than the probablity of the response will occur
    B- A dose response relationship that demonstrates a threshold at which the probability rather than the severity of the response will occur
    Correct

    A dose response relationship that demonstrates a threshold at which the severity rather than the probablity of the response will occur
  5. Which of the following best describes a non-stochastic effect?



    A- A dose response relationship that demonstrates a threshold at which the severity rather than the probablity of the response will occur
    B- A dose response relationship that demonstrates a threshold at which the probability rather than the severity of the response will occur
    Correct

    A dose response relationship that demonstrates a threshold at which the severity rather than the probablity of the response will occur
  6. With regard to the laws of Bergonie-Tribondeau, which of the following are true?

    A- 
    the higher the oxygen content, the more radio-resistant the tissue
    B- 
    the least specialized the cell, the more radio-resistant the tissue\
    C- 
    the more mitotic activity, the more radio-sensitive the tissue 
    D- 
    all of the above 
    Correct 

    the more mitotic activity, the more radio-sensitive the tissue
  7. A high frequency generator will minimize patient exposure dose by providing a

    A- 
    more polyenergetic primary beam



    B- widely varying voltage ripple 
    C-  more monoenergetic primary beam
    D- high efficiency filter within the x-ray tube
    Correct 

    more monoenergetic primary beam
  8. The design of the radiographic room will protect the radiologist from 

    A- 
    secondary radiation after the 1st interaction 
    B- 
    secondary radiation after a 2nd interaction 
    C- 
    primary radiation 
    D- 
    all of the above
    Correct 

    all of the above
  9. What limits leakage radiation from exiting the tube housing?

    A- 
    aluminum
    B- 
    copper
    C- 
    distance
    D- 
    lead and steel
    Correct 

    lead and steel
  10. The total filtration for a high frequency portable generator is

    A- 
    2.0 mm Al/eq
    B-
    2.5 mm Al/eq
    C- 
    3.0 mm Al/eq
    D- 
    3.5 mm Al/eq
    Correct 

    2.5 mm Al/eq
  11. This type of interaction may be characterized by ejection of an outer shell electron 
    compton
  12. A field survey instrument that determines exposure rates based upon the quantity of ion pairs detected (in air) by the unit is a ____Chamber
    ionization chamber
  13. Which of the following is responsible for evaluating dosage records for employees?

    A- 
    NCRP
    B- the FDA
    C-
     the RSO
    D- 
    UNCEAR
    • Correct 
      the RSO


  14. Which of the following equalizes different types of radiation when they have different energy transfer rates?

    A- 
    quality factor 
    B- 
    half live value 
    C- 
    linear energy transfer
    D- 
    tissue factor 
    Correct 

    quality factor
  15. The effect of a radiation exposure is

    A- 
    more than one, but not all of the above
    B- 
    a unique process, with easily predictable results
    C- 
    a very random process that will increase with the age of the radiographic tube 
    D- 
    a very random process that will increase with the increase of the linear energy transfer of the exposing radiation
    a very random process that will increase with the increase of the linear energy transfer of the exposing radiation
  16. The type of cell division that germ cells undergo is referred to as
     

    meiosis
  17. The effect of a radiation exposure is

    A- 
    more than one, but not all of the above
    B- 
    a unique process, with easily predictable results
    C- 
    a very random process that will increase with the age of the radiographic tube 
    D- 
    a very random process that will increase with the increase of the linear energy transfer of the exposing radiation
     a very random process that will increase with the increase of the linear energy transfer of the exposing radiation
  18. What is the order of mitosis?


    A- metaphase
    anaphase
    telophase
    prophase

    B- prophase
    anaphase
    metaphase
    telophase

    C- prophase
    metaphase
    telophase
    anaphas

    D- prophase
    metaphase
    anaphase
    telophase
    D
  19. A dose response relationship in which the response is random and the chance of a response increases with the dosage delivered rather than the severity of the response is classified as


    1. threshold
    2. non threshold
    3. stochastic
    4. non stochasti


    2 only
    3 only 
    1 and 3 only
    2 and 3 only
    Correct 

    2 and 3 only
  20. A long term effect of ionizing radiation will become evident after which of the following lengths of time?

    2 days
    1 week
    2 months
    any of all of the above
     

    2 months
  21. A long term effect of ionizing radiation will become evident after which of the following lengths of time?

    2 days
    1 week
    2 months

    2 months
  22. Ionizing radiation may have a carcinogenic effect.  Which of the following best describe the effect?

    non stochastic effect
    stochastic effect
    Correct 

    stochastic effect
  23. Why is beam restriction an important aspect of patient protection?

    increases the penetrating ability of the primary beam

    eliminates scatter and off focus radiation exiting from the tube housing

    increases the penetrating ability of the primary beam

    minimizes the scattering effects of excessive kVp
    Correct 

    limits the area of exposure to the ionizing radiation
  24. Why must the tube housing provide shielding?
    1. to absorb primary radiation
    2. to absorb secondary and scatter radiation 
    3. to absorb off focus radiation 


    •  


    • 1 only 


    • 1 and 2 only 





    • 1 and 3 only 


    •  

    2 and 3 only
  25. When assisting a radiographic procedure, how would the technologist's exposure be changed if he or she doubled the distance from the source?

    • Correct 
      decreased by 4 times


  26. A wall that is shielded as a primary barrier must have a shielding thickness of at least 
    Correct 

    1/16 inch Pb/eq
  27. How far from the floor must a secondary barrier shield extend?
    Correct 

    to the ceiling
  28. Which of the following are requirements for an  image intensification unit?

    1. dead man exposure switch
    2. maximum exposure of 100 mR/min
    3. source to skin distance of 12 inches
    4. maximum tube leakage of 100 mR/hr at 1 meter

     

    1 and 4 only 
    1, 2, 3 and 4 
    1, 3 and 4
    1 only
     Correct 

    1, 3 and 4
  29. Which of the following are considered to be basic properties of x-rays?
    1. highly penetrating; invisible
    2. affects photographic film
    3. travels at the speed of sound
    4. has the ability to cause biological but not chemical changes

    1, 2 and 4 only


    1 and 2 only
    2, 3 and 4 only

    3 and 4 only 
    Correct 

    1 and 2 only
  30. After a photoelectric interaction with matter, the result is


    a negative atom and a photoelectron
    a positive atom and a recoil electron
    a positive atom and a photoelectron 
    a positive atom and a negatron
    Correct 

    a positive atom and a photoelectron

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