Radiation protection- Test Questions With
Correct Answers
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 |- |CORRECT |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
(B) |0.5 |mSv
,(C) |1.0 |mSv
(D) |5.0 |mSv |- |CORRECT |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 |- |CORRECT |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 |- |CORRECT |ANSWER✔✔-C) |2 |and |3 |only
,5. |What |percentage |of |public |exposure |to |ionizing
radiation |is |from |medical |sources?
(A) |5%
(B) |10%
(C) |25%
(D) |50% |- |CORRECT |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 |- |CORRECT |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 |- |CORRECT |ANSWER✔✔-(B) |1 |and |2 |only
8. |The |interaction |between |ionizing |radiation |and |the
target |molecule |that |is |most |likely |to |occur |is |the
(A) |direct |effect
(B) |indirect |effect
(C) |target |effect
(D) |random |effect |- |CORRECT |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 |- |CORRECT |ANSWER✔✔-(D) |1, |2, |and |3
10. |The |unit |used |to |express |kinetic |energy |released |in
Correct Answers
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 |- |CORRECT |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
(B) |0.5 |mSv
,(C) |1.0 |mSv
(D) |5.0 |mSv |- |CORRECT |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 |- |CORRECT |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 |- |CORRECT |ANSWER✔✔-C) |2 |and |3 |only
,5. |What |percentage |of |public |exposure |to |ionizing
radiation |is |from |medical |sources?
(A) |5%
(B) |10%
(C) |25%
(D) |50% |- |CORRECT |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 |- |CORRECT |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 |- |CORRECT |ANSWER✔✔-(B) |1 |and |2 |only
8. |The |interaction |between |ionizing |radiation |and |the
target |molecule |that |is |most |likely |to |occur |is |the
(A) |direct |effect
(B) |indirect |effect
(C) |target |effect
(D) |random |effect |- |CORRECT |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 |- |CORRECT |ANSWER✔✔-(D) |1, |2, |and |3
10. |The |unit |used |to |express |kinetic |energy |released |in
