CNMT Exam 1-6 questions n correct
answers rated A+ updated
1. If one is receiving 20 mR/hr exposure at a distance of 3 m from a source, at what distance
would one received 500 mR/hr exposure?
a. 0.36 cm
b. 0.36 m
c. 60 cm
d. 0.60 cm - correct answer ✔✔ c. 60 cm
2. If an area survey reveals an ambient radiation level of 7 mR/hr, which of the following
radioactive signs would be the best choice to display on the door leading to this area?
a. caution: radioactive materials
b. caution: radiation area
c. caution: high radiation area
d. grave danger: very high radiation area - correct answer ✔✔ b. caution: radiation area
3. An ionization chamber if left in integral mode for 10 min and records a total dose of 3 mR.
Which of the following area posting signs should be used on the door leading to this area?
a. caution: radioactive materials
b. caution: radiation area
c. caution: high radiation area
d. grave danger: very high radiation area - correct answer ✔✔ b. caution: radiation area
,4. Which of the following area posting signs would not normally be found in a hospital?
a. caution: radioactive materials
b. caution: radiation area
c. caution: high radiation area
d. grave danger: very high radiation area - correct answer ✔✔ d. grave danger: very high
radiation area
5. Which of the following type of survey instruments would be best to use to survey a spill for
removable contamination in a hot lab area where radioisotopes are being store?
a. GM detector
b. personal pocket dosimeter
c. dose calibrator with a wipe test
d. well counter with a wipe test - correct answer ✔✔ d. well counter with a wipe test
6. Four HVLs reduce the amount of incident radiation exposure to what?
a. 12.5%
b. 6.25%
c. 3.125%
d. none of the above - correct answer ✔✔ b. 6.25%
7. Which of the following is not required to be included in the records of a radioactive package
receipt check in process?
,a. name of patient
b. name of radioisotope
c. amount of activity
d. both external and internal wipe checks - correct answer ✔✔ a. name of patient
8. A package is reading 2 mR/hr at distance of 2 m, what is the appropriate DOT label for this
package?
a. DOT 1
b. DOT 2
c. DOT 3
d. no labeling is required - correct answer ✔✔ b. DOT 2
9. The purpose of the transport index is:
a. to list the final destination of the package
b. to indicate the highest activity of the contents at 1 m from the source
c. not to give emergency personnel information about the contents of the package in an
accident
d. not to list the radioisotopes in the package - correct answer ✔✔ b. to indicate the highest
activity of the contents at 1 m from the source
10. If a patient who is having a bone scan urinates on the floor next to a camera, what would be
the best course of action to reduce radiation exposure?
a. let the radioactive urine decay to background
b. move the camera away from the spill
, c. remove the spill with some absorbent material and cover any residual activity with a lead
plate or lead apron
d. notify the referring physician of a medical event - correct answer ✔✔ c. remove the spill with
some absorbent material and cover any residual activity with a lead plate or lead apron
11. Which DOT radioactive level is entirely white?
a. DOT 1
b. DOT 2
c. DOT 3
d. DOT 4 - correct answer ✔✔ a. DOT 1
12. Which absorber would be the best to use to shield strontium-89?
a. cardboard
b. plexiglass
c. lead
d. no shielding required - correct answer ✔✔ b. plexiglass
13. Which of the following indicates the amount of radioactive substance present in a sample or
source?
a. activity
b. exposure
c. absorbed dose
d. dose equivalent - correct answer ✔✔ a. activity
answers rated A+ updated
1. If one is receiving 20 mR/hr exposure at a distance of 3 m from a source, at what distance
would one received 500 mR/hr exposure?
a. 0.36 cm
b. 0.36 m
c. 60 cm
d. 0.60 cm - correct answer ✔✔ c. 60 cm
2. If an area survey reveals an ambient radiation level of 7 mR/hr, which of the following
radioactive signs would be the best choice to display on the door leading to this area?
a. caution: radioactive materials
b. caution: radiation area
c. caution: high radiation area
d. grave danger: very high radiation area - correct answer ✔✔ b. caution: radiation area
3. An ionization chamber if left in integral mode for 10 min and records a total dose of 3 mR.
Which of the following area posting signs should be used on the door leading to this area?
a. caution: radioactive materials
b. caution: radiation area
c. caution: high radiation area
d. grave danger: very high radiation area - correct answer ✔✔ b. caution: radiation area
,4. Which of the following area posting signs would not normally be found in a hospital?
a. caution: radioactive materials
b. caution: radiation area
c. caution: high radiation area
d. grave danger: very high radiation area - correct answer ✔✔ d. grave danger: very high
radiation area
5. Which of the following type of survey instruments would be best to use to survey a spill for
removable contamination in a hot lab area where radioisotopes are being store?
a. GM detector
b. personal pocket dosimeter
c. dose calibrator with a wipe test
d. well counter with a wipe test - correct answer ✔✔ d. well counter with a wipe test
6. Four HVLs reduce the amount of incident radiation exposure to what?
a. 12.5%
b. 6.25%
c. 3.125%
d. none of the above - correct answer ✔✔ b. 6.25%
7. Which of the following is not required to be included in the records of a radioactive package
receipt check in process?
,a. name of patient
b. name of radioisotope
c. amount of activity
d. both external and internal wipe checks - correct answer ✔✔ a. name of patient
8. A package is reading 2 mR/hr at distance of 2 m, what is the appropriate DOT label for this
package?
a. DOT 1
b. DOT 2
c. DOT 3
d. no labeling is required - correct answer ✔✔ b. DOT 2
9. The purpose of the transport index is:
a. to list the final destination of the package
b. to indicate the highest activity of the contents at 1 m from the source
c. not to give emergency personnel information about the contents of the package in an
accident
d. not to list the radioisotopes in the package - correct answer ✔✔ b. to indicate the highest
activity of the contents at 1 m from the source
10. If a patient who is having a bone scan urinates on the floor next to a camera, what would be
the best course of action to reduce radiation exposure?
a. let the radioactive urine decay to background
b. move the camera away from the spill
, c. remove the spill with some absorbent material and cover any residual activity with a lead
plate or lead apron
d. notify the referring physician of a medical event - correct answer ✔✔ c. remove the spill with
some absorbent material and cover any residual activity with a lead plate or lead apron
11. Which DOT radioactive level is entirely white?
a. DOT 1
b. DOT 2
c. DOT 3
d. DOT 4 - correct answer ✔✔ a. DOT 1
12. Which absorber would be the best to use to shield strontium-89?
a. cardboard
b. plexiglass
c. lead
d. no shielding required - correct answer ✔✔ b. plexiglass
13. Which of the following indicates the amount of radioactive substance present in a sample or
source?
a. activity
b. exposure
c. absorbed dose
d. dose equivalent - correct answer ✔✔ a. activity
