Exam (elaborations)
NMTCB PREP QUESTIONS WITH SOLUTIONS 2024
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Exam of 3 pages for the course NMTCB at NMTCB (NMTCB PREP)
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NMTCB PREPOccupational Exposure Limits: Whole body - answer5 rem (50 mSv)/year
Occupational Exposure Limits: Skin or any extremity - answer50 rem (500 mSv)/year
Occupational Exposure Limits: Any organ or tissue - answer50 rem (500 mSv)/year
Occupational Exposure Limits: Lens of eye - answer15 rem (150 mSv)/year
Occupational Exposure Limits: Fetus of radiation worker - answer0.5 rem (5 mSv)/year
General Public Exposure Limits: Whole Body - answer0.1 rem (1 msV)/year
DOT Radioactive I (white) - answerLess than 0.5 mR/h at the surface, No detectable
radiation at 1 m
DOT Radioactive II (yellow) - answerLess than 50 mR/h at the surface, Up to 1 mR/h at
1m
DOT Radioactive III (yellow) - answerLess than 200 mR/h at the surface, Up to 10 mR/h
at 1 m
Caution: Radioactive Materials - answerRadioactive materials stored and exceed the
limit of 2 mR/h or 0.02 mSv/h
Caution: Radiation Area - answerPosted where one can receive more than 5 mR/h or
0.05 mSv/h at 30 cm
Caution: High Radiation Area - answerPosted where one can receive more than 100
mR/h or 1 mSv/h at 30 cm
Grave Danger: Very High Radiation Area - answerPosted where one can receive more
than 500 rads or 5 grays in 1 h at 1 m
Reactor produced isotopes - answerMo-99/Tc-99m
I-131
I-125
Xe-133
Cr-51
Sr-89
Sm-153
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