CNMT EXAM 1-6 (QUESTIONSBANK) QUESTIONS 2025/26 WITH COMPLETE SOLUTIONS.
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 - (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 - (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 - (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 - (ANSWER)d. grave danger: very high radiation area
,CNMT EXAM 1-6 (QUESTIONSBANK) QUESTIONS 2025/26 WITH COMPLETE SOLUTIONS.
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 - (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 - (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 - (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
,CNMT EXAM 1-6 (QUESTIONSBANK) QUESTIONS 2025/26 WITH COMPLETE SOLUTIONS.
d. no labeling is required - (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 - (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 - (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 - (ANSWER)a. DOT 1
12. Which absorber would be the best to use to shield strontium-89?
a. cardboard
, CNMT EXAM 1-6 (QUESTIONSBANK) QUESTIONS 2025/26 WITH COMPLETE SOLUTIONS.
b. plexiglass
c. lead
d. no shielding required - (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 - (ANSWER)a. activity
14. If the exposure rate is 25 mR/hr and the person being exposed is present for 25 min, what is his/her
total exposure?
a. 25 mR
b. 12.5 mR
c. 10.4 mR
d. 5.2 mR - (ANSWER)c. 10.4 mR
15. What is 120 Sv in millirads (quality factor = 1)?
a. 8.3 x 10e-8
b. 120,000 mrad
c. 1.2 million mrad
d. 12 million mrad - (ANSWER)d. 12 million mrad
16. An alpha particle is similar to what?
a. an electron
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 - (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 - (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 - (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 - (ANSWER)d. grave danger: very high radiation area
,CNMT EXAM 1-6 (QUESTIONSBANK) QUESTIONS 2025/26 WITH COMPLETE SOLUTIONS.
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 - (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 - (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 - (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
,CNMT EXAM 1-6 (QUESTIONSBANK) QUESTIONS 2025/26 WITH COMPLETE SOLUTIONS.
d. no labeling is required - (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 - (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 - (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 - (ANSWER)a. DOT 1
12. Which absorber would be the best to use to shield strontium-89?
a. cardboard
, CNMT EXAM 1-6 (QUESTIONSBANK) QUESTIONS 2025/26 WITH COMPLETE SOLUTIONS.
b. plexiglass
c. lead
d. no shielding required - (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 - (ANSWER)a. activity
14. If the exposure rate is 25 mR/hr and the person being exposed is present for 25 min, what is his/her
total exposure?
a. 25 mR
b. 12.5 mR
c. 10.4 mR
d. 5.2 mR - (ANSWER)c. 10.4 mR
15. What is 120 Sv in millirads (quality factor = 1)?
a. 8.3 x 10e-8
b. 120,000 mrad
c. 1.2 million mrad
d. 12 million mrad - (ANSWER)d. 12 million mrad
16. An alpha particle is similar to what?
a. an electron
