Radiation Protection Ch. 5 Exam
Actual Questions and Answers 2026
How is exposure monitoring accomplished? -
correct answer ✅By using a personnel dosimeter
Why should a personnel dosimeter be worn outside a protective
apron at collar level on the anterior surface of the body during a
fluoroscopic procedure? -
correct answer ✅Because the unprotected head, neck, and lenses
of the eye received 10 to 20 times more exposure than the
protected body trunk. When the dosimeter is located at collar level,
it also provides a reading of the approximate equivalent dose to the
thyroid gland and eyes of the occupationally exposed person. If the
lead apron's shielding integrity is not compromised, a dosimeter
reading that is within acceptable limits outside of the apron
ensures a minimal reading under the apron.
What must personnel dosimeters be able to detect and record from
day to day? -
correct answer ✅Must be able to detect and record both small
and large exposures in a consistent and reliable manner.
Why does a monitoring company supply a control monitor with
every new batch of dosimeters? -
correct answer ✅The monitoring company that supplies a health
care facility with OSLs provides a control monitor with each batch
,Radiation Protection Ch. 5 Exam
Actual Questions and Answers 2026
of dosimeters. This control serves as a basis for comparison with
the remaining OSL dosimeters after they have been returned to the
company for processing. Because the control monitor is supposed
to be kept in a radiation-free area within an imaging facility, its
optical density reading should be zero. After processing, if a control
monitor reading greater than zero is indicated, then the batch of
OSLs may have been exposed to radiation while in transit. To ensure
that false readings are not recorded, the control monitor reading is
reported to the health care facility. This reading, if different from
zero, must be subtracted from each of the remaining OSLs in the
batch to ensure accuracy in exposure reporting.
What must be done with results from personnel monitoring
programs to meet state and federal regulations? -
correct answer ✅Results from personnel monitoring programs
must be recorded accurately and maintained for review to meet
state and federal regulation.
When changing employment, what responsibility does a radiation
worker have for personal data pertinent to accumulated permanent
equivalent dose? -
correct answer ✅It must be given to the new employer so the
information can be placed on file.
,Radiation Protection Ch. 5 Exam
Actual Questions and Answers 2026
How sensitive to x-radiation and gamma radiation is an OSL
dosimeter -
correct answer ✅It has increased sensitivity providing accurate
readings as low as 10 micro Sv (1 mrem) for x-ray and gamma ray
photons with energies from 5 keV to 40 MeV
What are some of the requirements that radiation survey
instruments must meet if they are to be used for area monitoring? -
correct answer ✅*They must be portable, - so that one person can
carry and operate the device in an efficient manner for a period of
time.
* They must be durable - enough to withstand normal use,
including routine handling that occurs during standard operating
procedures.
* They must be reliable - ; only in such a case can radiation
exposure or exposure rate in a given area be accurately assessed.
How does a GM detector alert the operator to the presence of
ionizing radiation? -
correct answer ✅The GM detector has an audible sound system
(an audio amplifier and speaker) that alerts the operator to the
presence of ionizing radiation.
, Radiation Protection Ch. 5 Exam
Actual Questions and Answers 2026
What type of diagnostic x-ray equipment would ionization
chambers be used to calibrate? -
correct answer ✅Radiographic and fluoroscopic units can be
calibrated with ionization chambers. When used for this purpose,
the ionization chamber is connected to an electrometer that can
measure tiny electrical currents with high precision and accuracy.
When laser light is incident on the sensing material in an OSL
dosimeter, the material :
A. Becomes luminescent in proportion to the amount of radiation
exposure received.
B. Fluoresces in proportion to the amount of radiation exposure
received and then emits beta particles.
C. Phosphoresces in proportion to the amount of radiation
exposure received and then darkens.
D. Turns ice blue and fluoresces in proportion to the amount of
radiation exposure received. -
correct answer ✅A. Becomes luminescent in proportion to the
amount of radiation exposure received.
Which of the following chemical functions as the sensing material
in a thermoluminescent dosimeter?
A. Barium sulfate
Actual Questions and Answers 2026
How is exposure monitoring accomplished? -
correct answer ✅By using a personnel dosimeter
Why should a personnel dosimeter be worn outside a protective
apron at collar level on the anterior surface of the body during a
fluoroscopic procedure? -
correct answer ✅Because the unprotected head, neck, and lenses
of the eye received 10 to 20 times more exposure than the
protected body trunk. When the dosimeter is located at collar level,
it also provides a reading of the approximate equivalent dose to the
thyroid gland and eyes of the occupationally exposed person. If the
lead apron's shielding integrity is not compromised, a dosimeter
reading that is within acceptable limits outside of the apron
ensures a minimal reading under the apron.
What must personnel dosimeters be able to detect and record from
day to day? -
correct answer ✅Must be able to detect and record both small
and large exposures in a consistent and reliable manner.
Why does a monitoring company supply a control monitor with
every new batch of dosimeters? -
correct answer ✅The monitoring company that supplies a health
care facility with OSLs provides a control monitor with each batch
,Radiation Protection Ch. 5 Exam
Actual Questions and Answers 2026
of dosimeters. This control serves as a basis for comparison with
the remaining OSL dosimeters after they have been returned to the
company for processing. Because the control monitor is supposed
to be kept in a radiation-free area within an imaging facility, its
optical density reading should be zero. After processing, if a control
monitor reading greater than zero is indicated, then the batch of
OSLs may have been exposed to radiation while in transit. To ensure
that false readings are not recorded, the control monitor reading is
reported to the health care facility. This reading, if different from
zero, must be subtracted from each of the remaining OSLs in the
batch to ensure accuracy in exposure reporting.
What must be done with results from personnel monitoring
programs to meet state and federal regulations? -
correct answer ✅Results from personnel monitoring programs
must be recorded accurately and maintained for review to meet
state and federal regulation.
When changing employment, what responsibility does a radiation
worker have for personal data pertinent to accumulated permanent
equivalent dose? -
correct answer ✅It must be given to the new employer so the
information can be placed on file.
,Radiation Protection Ch. 5 Exam
Actual Questions and Answers 2026
How sensitive to x-radiation and gamma radiation is an OSL
dosimeter -
correct answer ✅It has increased sensitivity providing accurate
readings as low as 10 micro Sv (1 mrem) for x-ray and gamma ray
photons with energies from 5 keV to 40 MeV
What are some of the requirements that radiation survey
instruments must meet if they are to be used for area monitoring? -
correct answer ✅*They must be portable, - so that one person can
carry and operate the device in an efficient manner for a period of
time.
* They must be durable - enough to withstand normal use,
including routine handling that occurs during standard operating
procedures.
* They must be reliable - ; only in such a case can radiation
exposure or exposure rate in a given area be accurately assessed.
How does a GM detector alert the operator to the presence of
ionizing radiation? -
correct answer ✅The GM detector has an audible sound system
(an audio amplifier and speaker) that alerts the operator to the
presence of ionizing radiation.
, Radiation Protection Ch. 5 Exam
Actual Questions and Answers 2026
What type of diagnostic x-ray equipment would ionization
chambers be used to calibrate? -
correct answer ✅Radiographic and fluoroscopic units can be
calibrated with ionization chambers. When used for this purpose,
the ionization chamber is connected to an electrometer that can
measure tiny electrical currents with high precision and accuracy.
When laser light is incident on the sensing material in an OSL
dosimeter, the material :
A. Becomes luminescent in proportion to the amount of radiation
exposure received.
B. Fluoresces in proportion to the amount of radiation exposure
received and then emits beta particles.
C. Phosphoresces in proportion to the amount of radiation
exposure received and then darkens.
D. Turns ice blue and fluoresces in proportion to the amount of
radiation exposure received. -
correct answer ✅A. Becomes luminescent in proportion to the
amount of radiation exposure received.
Which of the following chemical functions as the sensing material
in a thermoluminescent dosimeter?
A. Barium sulfate
