LRA 216 final review test with all answers bb bb bb bb bb bb bb
1. Which units quantify ionization of air from x-or gamma-radiation?: 1,2, and 3
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are correct
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2. Which units represent energy absorbed in matter from ionizing radiation
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(absorbed dose)?: 2 and 3 only (Gray and rad)
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3. Which units express dose equivalent,accounting for occupational radiation
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risk?: 1 and 3 only (Sievert and rem)
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4. WhatistheSIequivalentoftheexposureunitRoentgen(R),whichmeasures
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ionization in air?: Coulumb/kilogram
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5. What is the SI equivalent of the absorbed dose unit rad?: Gray
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6. What is the SI equivalent of the rem, which measures dose equivalent in
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occupational exposure?: Sievert
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7. Which unit reflects the maximum annual whole body dose allowed for
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occupational exposure?: 0.05 Sv
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8. T/F:LET, RBE, and OER all influence how cells respond to radiation expo-
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sure: True
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9. What term defines the radiation dose causing skin reddening in 50% of
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exposed individuals?: SED50
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10. What is the maximum permitted x-ray tube leakage at 1 meter when oper-
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ating at maximum output?: 100mR/hr
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11. What is the maximum cumulative whole body dose (in rem) allowed for a 50
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year old radiation worker?: 50
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12. Whatistheannualwholebodyeffectivedoselimit(inrem)foroccupational
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exposure in diagnostic radiology?: 5.0
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13. What is the minimum thickness of lead required for a primary protective
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barrier in diagnostic radiology?: 1/16 inch
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14. What is the weekly dose limit (in mrem) for radiation exposure in an
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uncontrolled area?: 10
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15. What is the minimum required lead equivalency (in mm Pb) for protectice
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1/3 bb bb
1. Which units quantify ionization of air from x-or gamma-radiation?: 1,2, and 3
bb bb bb bb bb bb bb bb bb bb bb
are correct
bb bb
2. Which units represent energy absorbed in matter from ionizing radiation
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(absorbed dose)?: 2 and 3 only (Gray and rad)
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3. Which units express dose equivalent,accounting for occupational radiation
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risk?: 1 and 3 only (Sievert and rem)
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4. WhatistheSIequivalentoftheexposureunitRoentgen(R),whichmeasures
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ionization in air?: Coulumb/kilogram
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5. What is the SI equivalent of the absorbed dose unit rad?: Gray
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6. What is the SI equivalent of the rem, which measures dose equivalent in
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occupational exposure?: Sievert
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7. Which unit reflects the maximum annual whole body dose allowed for
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occupational exposure?: 0.05 Sv
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8. T/F:LET, RBE, and OER all influence how cells respond to radiation expo-
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sure: True
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9. What term defines the radiation dose causing skin reddening in 50% of
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exposed individuals?: SED50
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10. What is the maximum permitted x-ray tube leakage at 1 meter when oper-
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ating at maximum output?: 100mR/hr
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11. What is the maximum cumulative whole body dose (in rem) allowed for a 50
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year old radiation worker?: 50
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12. Whatistheannualwholebodyeffectivedoselimit(inrem)foroccupational
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exposure in diagnostic radiology?: 5.0
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13. What is the minimum thickness of lead required for a primary protective
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barrier in diagnostic radiology?: 1/16 inch
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14. What is the weekly dose limit (in mrem) for radiation exposure in an
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uncontrolled area?: 10
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15. What is the minimum required lead equivalency (in mm Pb) for protectice
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1/3 bb bb
