Industrial Radiography Radiation Safety
Questions and Answers Rated A+
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) - ANSWER-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 - ANSWER-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) - ANSWER-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 - ANSWER-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 - ANSWER-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) - ANSWER-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 - ANSWER-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) - ANSWER-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) - ANSWER-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) - ANSWER-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) - ANSWER-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) - ANSWER-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) - ANSWER-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?
a. 2.0 mR (20 uSv)
b. 4.0 mR (40 uSv)
c. 6.0 mR (60 uSv)
d. 8.0 mR (80 uSv) - ANSWER-d. 8.0 mR (80 uSv)
A radiographer has several avenues to seek guidance and counsel. The first person he
or she can turn to is?
a. their state or federal jurisdiction's hotline
b. their program's radiation safety officer (RSO)
c. a senior technician
d. the NRC - ANSWER-b. their program's radiation safety officer (RSO)
A radiographer is receiving 100 mR (1000 uSv) at the crank assembly. The crank
assembly is 25 ft (7.62 m) in length. How long will it take for the radiographer to receive
a total dose of 50 mR (500 uSv)?
a. 30 min
b. 60 min
c. 90 min
d. 120 min - ANSWER-a. 30 min
, A radiographer is receiving 100 mR (1000 uSv) at the crank assembly. The crank
assembly is 25 ft (7.62 m) in length. Where would the "RADIATION AREA" sign be
posted?
a. 111.8 ft (34.08 m)
b. 221.3 ft (67.45 m)
c. 343.7 ft (104.76 m)
d. 176.8 ft (53.89 m) - ANSWER-a. 111.8 ft (34.08 m)
A radiographer reads 7.5 on the 10x scale of the survey meter. What is the current dose
rate at that position?
a. 7.5 mR/h
b. 75 mR/h
c. 750 mR/h
d. 7.5 R/h - ANSWER-b. 75 mR/h
A radiographer's survey meter is showing 0 near the source; it can be safely assumed
that:
a. there is no radiation present
b. the meter is inoperable and should be repaired when the shift is over
c. the meter may be inoperable and a replacement should be used immediately
d. the meter is in an inoperable state; the radiographer should retreat form the source
until an operational meter has replaced the suspect meter - ANSWER-d. the meter is in
an inoperable state; the radiographer should retreat form the source until an operational
meter has replaced the suspect meter
A rate alarm meter or alarming rate meter must sound a
continuous audible alarm greater than 80 dB at 1 ft (0.3 m) at:
a. 500 mR/h (5000 uSv/h)
b. 400 mR/h (4000 uSv/h)
c. 100 mR/h (1000 uSv/h)
d. 2 mR/h (20 uSv/h) - ANSWER-a. 500 mR/h (5000 uSv/h)
A restricted area is defined as an area:
a. that is controlled and posted
b. that must be posted and where an individual may receive up to 5 mR/h (50 uSv/h)
c. that must be posted and where an individual may receive up to 100 mR/h (1000
uSv/h)
d. to which access is restricted for the purpose of controlling radiation exposure -
ANSWER-d. to which access is restricted for the purpose of controlling radiation
exposure
Questions and Answers Rated A+
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) - ANSWER-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 - ANSWER-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) - ANSWER-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 - ANSWER-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 - ANSWER-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) - ANSWER-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 - ANSWER-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) - ANSWER-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) - ANSWER-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) - ANSWER-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) - ANSWER-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) - ANSWER-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) - ANSWER-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?
a. 2.0 mR (20 uSv)
b. 4.0 mR (40 uSv)
c. 6.0 mR (60 uSv)
d. 8.0 mR (80 uSv) - ANSWER-d. 8.0 mR (80 uSv)
A radiographer has several avenues to seek guidance and counsel. The first person he
or she can turn to is?
a. their state or federal jurisdiction's hotline
b. their program's radiation safety officer (RSO)
c. a senior technician
d. the NRC - ANSWER-b. their program's radiation safety officer (RSO)
A radiographer is receiving 100 mR (1000 uSv) at the crank assembly. The crank
assembly is 25 ft (7.62 m) in length. How long will it take for the radiographer to receive
a total dose of 50 mR (500 uSv)?
a. 30 min
b. 60 min
c. 90 min
d. 120 min - ANSWER-a. 30 min
, A radiographer is receiving 100 mR (1000 uSv) at the crank assembly. The crank
assembly is 25 ft (7.62 m) in length. Where would the "RADIATION AREA" sign be
posted?
a. 111.8 ft (34.08 m)
b. 221.3 ft (67.45 m)
c. 343.7 ft (104.76 m)
d. 176.8 ft (53.89 m) - ANSWER-a. 111.8 ft (34.08 m)
A radiographer reads 7.5 on the 10x scale of the survey meter. What is the current dose
rate at that position?
a. 7.5 mR/h
b. 75 mR/h
c. 750 mR/h
d. 7.5 R/h - ANSWER-b. 75 mR/h
A radiographer's survey meter is showing 0 near the source; it can be safely assumed
that:
a. there is no radiation present
b. the meter is inoperable and should be repaired when the shift is over
c. the meter may be inoperable and a replacement should be used immediately
d. the meter is in an inoperable state; the radiographer should retreat form the source
until an operational meter has replaced the suspect meter - ANSWER-d. the meter is in
an inoperable state; the radiographer should retreat form the source until an operational
meter has replaced the suspect meter
A rate alarm meter or alarming rate meter must sound a
continuous audible alarm greater than 80 dB at 1 ft (0.3 m) at:
a. 500 mR/h (5000 uSv/h)
b. 400 mR/h (4000 uSv/h)
c. 100 mR/h (1000 uSv/h)
d. 2 mR/h (20 uSv/h) - ANSWER-a. 500 mR/h (5000 uSv/h)
A restricted area is defined as an area:
a. that is controlled and posted
b. that must be posted and where an individual may receive up to 5 mR/h (50 uSv/h)
c. that must be posted and where an individual may receive up to 100 mR/h (1000
uSv/h)
d. to which access is restricted for the purpose of controlling radiation exposure -
ANSWER-d. to which access is restricted for the purpose of controlling radiation
exposure
