ASNT Study Guide - Industrial
Radiography Radiation Safety Test /
Revised Questions and Answers / Sure
A+
A cobalt source has decayed from its original activity after 3 half-lives. Originally it was 88 Ci (3256 GBq).
Its current activity is:
a. 44 Ci (1628 GBq)
b. 22 Ci (814 GBq)
c. 11 Ci (407 GBq)
d. 8 Ci (296 GBq) - c. 11 Ci (407 GBq)
A cobalt source of 73 Ci is exposed for a full 60 min. Assume a 14.0 R/Ci/h factor, shooting through a 3
half-value collimator. What would the restricted area be on the cold or collimated side of the
collimator?
a. 149 ft (45.42 m)
b. 162 ft (49.38 m)
c. 211 ft (64.31 m)
d. 253 ft (77.44m) - d. 253 ft (77.44m)
A control panel in an X-ray system must have clearly visible which of the following statements?
a. caution: ionizing radiation emitted when energized
b. caution: dangerous radiation emitted when energized
c. caution: X-rays produced when energized
d. danger: radiation producing device - c. caution: X-rays produced when energized
,A declared pregnant radiographer or assistant may receive no more than __________ for the entire
pregnancy.
a. 500 mR (5000 uSv)
b. 5000 mR (50000 uSv)
c. 100 mR (1000 uSv)
d. 5 R (50 mSv) - a. 500 mR (5000 uSv)
A direct reading ionization chamber, such as a dosimeter, has the advantage of providing an:
a. accurate dose history for the month
b. immediate dose history since last time charged
c. accurate dose rate
d. immediate dose rate - b. immediate dose history since last time charged
A dosimeter measures:
a. dose rate
b. lifetime exposure
c. weekly exposure
d. dose received since the last time it was charged - d. dose received since the last time it was
charged
A dosimeter must be capable of reading a range of:
a. 0-100 mR (0-1 mSv)
b. 0-200 mR (0-2 mSv)
c. 0-500 mR (0-5 mSv)
d. 0-1 R (0-10 mSv) - b. 0-200 mR (0-2 mSv)
,A film badge/TLD records what?
a. dose rate
b. exposure rate
c. total dose history for the period worn
d. daily dose - c. total dose history for the period worn
A high radiation area is defined as "an area accessible to individuals, in which they could receive..."
a. 2 mR/h (20 uSv/h)
b. 5 mR/h (50 uSv/h)
c. 50 mR/h (500 uSv/h)
d. 100 mR/h (1000 uSv/h) - d. 100 mR/h (1000 uSv/h)
A leak test would be considered failed should the sample tested return a value greater than:
a. 0.005 Ci (185,000,000 Bq)
b. 0.005 mCi (185,000 Bq)
c. 0.005 uCi (185 Bq)
d. 0.005 nCi (0.185 Bq) - c. 0.005 uCi (185 Bq)
A member of the public or unmonitored individual is allowed to receive up to, but not to exceed:
a. 2 mR/h, 500 mR/year
(20 uSv/h, 5000 uSv/year)
b. 2 mR/h, 100 mR/year
(20 uSv/h, 1000 uSv/year)
c. 5 mR/h, 100 mR/year
, (50 uSv/h, 1000 uSv/year)
d. 5 mR/h, 500 mR/year
(50 uSv/h, 5000 uSv/year) - b. 2 mR/h, 100 mR/year
(20 uSv/h, 1000 uSv/year)
A monitored person may receive up to 5000 mR (50000 uSv) per year. What would be considered an
excessive amount of radiation exposure to that individual?
a. exposures of more than 100 mR (1000 uSv) in one week.
b. any exposure over 1250 mR (12500 uSv) in a quarter.
c. any unnecessary exposure to radiation
d. exposures of 500 mR/h (5000 uSv) - c. any unnecessary exposure to radiation
A non-declared pregnant radiographer or assistant may receive no more than:
a. 0.5 rem per year (5 mSv)
b. 5000 rem per year (50 Sv)
c. 100 mR per year (1000 uSv)
d. 5 R per year (50 mSv) - d. 5 R per year (50 mSv)
A radiation area is defined as "an area accessible to individuals, in which they could receive..."
a. 2 mR/h (20 uSv/h)
b. 5 mR/h (50 uSv/h)
c. 50 mR/h (500 uSv/h)
d. 100 mR/h (1000 uSv/h) - b. 5 mR/h (50 uSv/h)
A radiographer and assistant are standing in a 2 mR/h (20 uSv/h) field. What would the assistant's total
dose be after 4 h?
Radiography Radiation Safety Test /
Revised Questions and Answers / Sure
A+
A cobalt source has decayed from its original activity after 3 half-lives. Originally it was 88 Ci (3256 GBq).
Its current activity is:
a. 44 Ci (1628 GBq)
b. 22 Ci (814 GBq)
c. 11 Ci (407 GBq)
d. 8 Ci (296 GBq) - c. 11 Ci (407 GBq)
A cobalt source of 73 Ci is exposed for a full 60 min. Assume a 14.0 R/Ci/h factor, shooting through a 3
half-value collimator. What would the restricted area be on the cold or collimated side of the
collimator?
a. 149 ft (45.42 m)
b. 162 ft (49.38 m)
c. 211 ft (64.31 m)
d. 253 ft (77.44m) - d. 253 ft (77.44m)
A control panel in an X-ray system must have clearly visible which of the following statements?
a. caution: ionizing radiation emitted when energized
b. caution: dangerous radiation emitted when energized
c. caution: X-rays produced when energized
d. danger: radiation producing device - c. caution: X-rays produced when energized
,A declared pregnant radiographer or assistant may receive no more than __________ for the entire
pregnancy.
a. 500 mR (5000 uSv)
b. 5000 mR (50000 uSv)
c. 100 mR (1000 uSv)
d. 5 R (50 mSv) - a. 500 mR (5000 uSv)
A direct reading ionization chamber, such as a dosimeter, has the advantage of providing an:
a. accurate dose history for the month
b. immediate dose history since last time charged
c. accurate dose rate
d. immediate dose rate - b. immediate dose history since last time charged
A dosimeter measures:
a. dose rate
b. lifetime exposure
c. weekly exposure
d. dose received since the last time it was charged - d. dose received since the last time it was
charged
A dosimeter must be capable of reading a range of:
a. 0-100 mR (0-1 mSv)
b. 0-200 mR (0-2 mSv)
c. 0-500 mR (0-5 mSv)
d. 0-1 R (0-10 mSv) - b. 0-200 mR (0-2 mSv)
,A film badge/TLD records what?
a. dose rate
b. exposure rate
c. total dose history for the period worn
d. daily dose - c. total dose history for the period worn
A high radiation area is defined as "an area accessible to individuals, in which they could receive..."
a. 2 mR/h (20 uSv/h)
b. 5 mR/h (50 uSv/h)
c. 50 mR/h (500 uSv/h)
d. 100 mR/h (1000 uSv/h) - d. 100 mR/h (1000 uSv/h)
A leak test would be considered failed should the sample tested return a value greater than:
a. 0.005 Ci (185,000,000 Bq)
b. 0.005 mCi (185,000 Bq)
c. 0.005 uCi (185 Bq)
d. 0.005 nCi (0.185 Bq) - c. 0.005 uCi (185 Bq)
A member of the public or unmonitored individual is allowed to receive up to, but not to exceed:
a. 2 mR/h, 500 mR/year
(20 uSv/h, 5000 uSv/year)
b. 2 mR/h, 100 mR/year
(20 uSv/h, 1000 uSv/year)
c. 5 mR/h, 100 mR/year
, (50 uSv/h, 1000 uSv/year)
d. 5 mR/h, 500 mR/year
(50 uSv/h, 5000 uSv/year) - b. 2 mR/h, 100 mR/year
(20 uSv/h, 1000 uSv/year)
A monitored person may receive up to 5000 mR (50000 uSv) per year. What would be considered an
excessive amount of radiation exposure to that individual?
a. exposures of more than 100 mR (1000 uSv) in one week.
b. any exposure over 1250 mR (12500 uSv) in a quarter.
c. any unnecessary exposure to radiation
d. exposures of 500 mR/h (5000 uSv) - c. any unnecessary exposure to radiation
A non-declared pregnant radiographer or assistant may receive no more than:
a. 0.5 rem per year (5 mSv)
b. 5000 rem per year (50 Sv)
c. 100 mR per year (1000 uSv)
d. 5 R per year (50 mSv) - d. 5 R per year (50 mSv)
A radiation area is defined as "an area accessible to individuals, in which they could receive..."
a. 2 mR/h (20 uSv/h)
b. 5 mR/h (50 uSv/h)
c. 50 mR/h (500 uSv/h)
d. 100 mR/h (1000 uSv/h) - b. 5 mR/h (50 uSv/h)
A radiographer and assistant are standing in a 2 mR/h (20 uSv/h) field. What would the assistant's total
dose be after 4 h?
