Radiation Safety NMTCB Practice Exam Questions and Answers Best rated A+ Guaranteed Success Latest Update

NRC Occupational exposure of Whole body - 50 msv/year 5 rem/year NRC Occupational exposure Lens of eye - 150 msv/year 15 rem/year NRC Occupational exposure of organ or tissue - 500 msv/year 50 rem/year NRC Occupational exposure of skin or extremity - 500 msv/year 50 rem/year NRC Occupational exposure of general public - 1 msv/year .1 rem/year NRC Occupational exposure of fetus exposed worker - 5 msv/year .5 rem/year Caution: Radioactive Materials (sign) - -Where radioactive materials are used or stored -Usually in entrances of labs or depts Caution: Radiation Area (sign) - -Where individual can receive more than .05 msv (5rem) in 1 hour -Seen in entrances to nuc med labs Caution: High Radiation Area (sign) - -Individual can receive more than 1msv (100rem) in 1 hour-Commonly where radiation therapy is performed Grave Danger: Very High Radiation Area (sign) - -Individual can receive an absorbed dose of more than 5 gy (500rad) in 1 hour -Not usually in hospital setting Unrestricted area - -Individual can receive less than .02 msv (2rem) in 1 hour -(example, reception and waiting area) Inverse square law (distance) - By doubling the distance the radiation dose rate is reduced to 1/4 of the original Inverse square law (distance) equation - (Intensity 1)(Density 1)^2=(Intensity 2)(Density2)^2 DOT White 1 - -Surface no more than .5 mR/hr -1 meter (3ft) no detected radioactivity DOT Yellow 2 - -Surface no more than 50 mR/hr -1 meter (3ft) no more than 1 mR/hr