Your cobalt source of 61 Ci (2257 GBq) is exposed ...

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ASNT Level III Study Guide - Industrial Radiography Radiation Safety Questions

Question Number 65

Your cobalt source of 61 Ci (2257 GBq) is exposed for one single 30-min exposure. This is the only exposure that will be made that day. Assume a 14.0 R (140 mSv) per curie factor, shooting through a 3 half-value collimator. Standing at 100 ft (30.48 m), what will your total exposure be?a. 11.0 mR (110 uSv)b. 5.3 mR (53 uSv)c. 8.8 mR (88 uSv)d. 4.4 mR (44 uSv)

b. 5.3 mR (53 uSv)

✔ Correct Answer:

b. 5.3 mR (53 uSv)

ASNT Level III Study Guide - Industrial Radiography Radiation Safety Questions

Question Number 65

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