©THESTAR 2024/2025 ALL RIGHTS RESERVED 11:09PM. A+
Radiation protection: Test Questions With
Correct Answers 100% Verified.
1. Biologic material irradiated under hypoxic conditions
is
(A) more sensitive than when irradiated under
oxygenated conditions
(B) less sensitive than when irradiated under
anoxic conditions
(C) less sensitive than when irradiated under
oxygenated conditions
(D) unaffected by the presence or absence o
oxygen - Answer✔(C) less sensitive than when irradiated under
oxygenated conditions
2. According to the National Council on Radiation
Protection and Measurements (NCRP), the monthly
gestational dose-equivalent limit or embryo/ fetus
of a pregnant radiographer is
(A) 0.1 mSv
1
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 11:09PM. A+
(B) 0.5 mSv
(C) 1.0 mSv
(D) 5.0 mSv - Answer✔(B) 0.5 mSv
3. A time of 1.5 minutes is required for a particular
fluoroscopic examination, whose exposure rate is
275 mR/h. What is the approximate radiation
exposure for the radiologic staff present in the
fluoroscopy room during the examination?
(A) 183 mR
(B) 68.7 mR
(C) 18.33 mR
(D) 6.87 mR - Answer✔(D) 6.87 mR
4. Stochastic/probabilistic effects of radiation are
those that
1. have a threshold
2. may be described as "all-or-nothing" effects
3. are late effects
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3 - Answer✔C) 2 and 3 only
5. What percentage of public exposure to ionizing
radiation is from medical sources?
2
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 11:09PM. A+
(A) 5%
(B) 10%
(C) 25%
(D) 50% - Answer✔(D) 50%
6. Which of the following cell types has the greatest
radiosensitivity in the adult human?
(A) Nerve cells
(B) Muscle cells
(C) Spermatids
(D) Lymphocytes - Answer✔(D) Lymphocytes
7. Guidelines for the use fo protective shielding state
that gonadal shielding should be used
1. if the patient has reasonable reproductive
potential
2. when the gonads are within 5 cm of the
collimated field
3. when tight collimation is not possible
(A) 1 only
(B) 1 and 2 only
(C) 1 and 3 only
(D) 2 and 3 only - Answer✔(B) 1 and 2 only
8. The interaction between ionizing radiation and the
3
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 11:09PM. A+
target molecule that is most likely to occur is the
(A) direct effect
(B) indirect effect
(C) target effect
(D) random effect - Answer✔B) indirect effect
9. Sources o natural background radiation include
1. radon
2. internal sources
3. thoron
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3 - Answer✔(D) 1, 2, and 3
10. The unit used to express kinetic energy released in
matter is the
(A) erg
(B) gray
(C) kerma
(D) rad - Answer✔(C) kerma
11. Which acute radiation syndrome requires the largest
exposure before the associated effects become
apparent?
4
Radiation protection: Test Questions With
Correct Answers 100% Verified.
1. Biologic material irradiated under hypoxic conditions
is
(A) more sensitive than when irradiated under
oxygenated conditions
(B) less sensitive than when irradiated under
anoxic conditions
(C) less sensitive than when irradiated under
oxygenated conditions
(D) unaffected by the presence or absence o
oxygen - Answer✔(C) less sensitive than when irradiated under
oxygenated conditions
2. According to the National Council on Radiation
Protection and Measurements (NCRP), the monthly
gestational dose-equivalent limit or embryo/ fetus
of a pregnant radiographer is
(A) 0.1 mSv
1
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 11:09PM. A+
(B) 0.5 mSv
(C) 1.0 mSv
(D) 5.0 mSv - Answer✔(B) 0.5 mSv
3. A time of 1.5 minutes is required for a particular
fluoroscopic examination, whose exposure rate is
275 mR/h. What is the approximate radiation
exposure for the radiologic staff present in the
fluoroscopy room during the examination?
(A) 183 mR
(B) 68.7 mR
(C) 18.33 mR
(D) 6.87 mR - Answer✔(D) 6.87 mR
4. Stochastic/probabilistic effects of radiation are
those that
1. have a threshold
2. may be described as "all-or-nothing" effects
3. are late effects
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3 - Answer✔C) 2 and 3 only
5. What percentage of public exposure to ionizing
radiation is from medical sources?
2
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 11:09PM. A+
(A) 5%
(B) 10%
(C) 25%
(D) 50% - Answer✔(D) 50%
6. Which of the following cell types has the greatest
radiosensitivity in the adult human?
(A) Nerve cells
(B) Muscle cells
(C) Spermatids
(D) Lymphocytes - Answer✔(D) Lymphocytes
7. Guidelines for the use fo protective shielding state
that gonadal shielding should be used
1. if the patient has reasonable reproductive
potential
2. when the gonads are within 5 cm of the
collimated field
3. when tight collimation is not possible
(A) 1 only
(B) 1 and 2 only
(C) 1 and 3 only
(D) 2 and 3 only - Answer✔(B) 1 and 2 only
8. The interaction between ionizing radiation and the
3
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 11:09PM. A+
target molecule that is most likely to occur is the
(A) direct effect
(B) indirect effect
(C) target effect
(D) random effect - Answer✔B) indirect effect
9. Sources o natural background radiation include
1. radon
2. internal sources
3. thoron
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3 - Answer✔(D) 1, 2, and 3
10. The unit used to express kinetic energy released in
matter is the
(A) erg
(B) gray
(C) kerma
(D) rad - Answer✔(C) kerma
11. Which acute radiation syndrome requires the largest
exposure before the associated effects become
apparent?
4
