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Radiation Safety Review and Essentials Program Mock Exam Questions with Correct Answers
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  • Course
  • Radiation safety
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  • Radiation Safety

The amount of energy deposited in a unit mass in human tissue or other media is the definition of: A. Absorbed dose B. Biological dose C. Effective dose D. Dose Equivalent - Answer-A. Absorbed dose After Tc99m is removed from a generator, it takes approximately ____ hours for the Tc99m act...

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  • October 10, 2024
  • 26
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • radiation safety review and essentials program moc
  • the amount of energy deposited in a unit mass in h

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  • Radiation safety
  • Radiation safety

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Radiation Safety Review and Essentials
Program Mock Exam Questions with
Correct Answers
The amount of energy deposited in a unit mass in human tissue or other media is the
definition of:

A. Absorbed dose
B. Biological dose
C. Effective dose
D. Dose Equivalent - Answer-A. Absorbed dose

After Tc99m is removed from a generator, it takes approximately ____ hours for the
Tc99m activity to build to a maximum level.

A. 6
B. 12
C. 18
D. 24 - Answer-D. 24

A pressurized gas-filled ionization chamber for assaying activities in
radiopharmaceutical vials and syringes is also known as a:

A. Well counter
B. Survey meter
C. Dose calibrator
D. Uptake probe - Answer-C. Dose Calibrator

Which type of decay is neutron-rich?

A. Beta decay
B. Alpha decay
C. Electron capture
D. Gamma decay - Answer-A. Beta decay

A survey meter must be calibrated:

A. Daily
B. Weekly
C. Quarterly
D. Annually - Answer-D. Annually

,Since positron decay and electron capture produces the exact same daughter product
in the end, how can these two methods of decay be differentiated?

A. Auger electron production
B. Photoelectric effect occurs
C. Characteristic x-ray production
D. Gamma ray production - Answer-C. Characteristic x-ray production

If the exposure rate at 4 meters from a radioactive source is 5 mR/hr, what will the
exposure rate be at 3 meters?

A. 2.8 mR/hr
B. 6.5 mR/hr
C. 7.4 mR/hr
D. 8.9 mR/hr - Answer-D. 8.9 mR/hr

If the HVL for lead for Tc-99m is 0.25 mm and a lead shield for a Tc source is 1.00 mm
thick, what will the exposure rate be from the shielded vial if the unshielded vial had a
rate of 50 mR/hr?

A. 1.6 mR/hr
B. 3.1 mR/hr
C. 6.3 mR/hr
D.. 12.5 mR/hr - Answer-B. 3.1 mR/hr

Upon receipt of radioactive shipments, the NMT as good practice, should:

A. Visually inspect and monitor each shipment package for contamination by survey and
wipe test.
B. Monitor the first shipment each day for contamination by survey and wipe test.
C. Following visual inspection, record each shipment in the inventory log book and
forward receipt information to the RSO.
D. Wipe test the container lid, record shipment in the inventory log book, and forward
wipe readings to the RSO. - Answer-A. Visually inspect and monitor each shipment
package for contamination by survey and wipe test.

During regular working hours, radioactive packages must be monitored within how
many hours from receipt of shipment?

A. 1
B. 2
C. 3
D. 4 - Answer-C. 3

How long must survey records and calibrations be kept according to NRC 10 CFR
20.1501?

, A. 1 year
B. 3 years
C. 5 years
D. Duration of license - Answer-B. 3 years

ALARA stands for:

A. As Low As Reasonably Attenuated
B. As Low As Reasonably Attained
C. As Low As Reasonably Achievable
D. As Low As Reasonably Accommodated - Answer-C. As Low As Reasonably
Achievable

Which of the following postings is required for areas or rooms where radiation materials
are used or stored?

A. 'Caution, Radiation Area'
B. 'Caution, High Radiation Area'
C. 'Caution, Radioactive Materials'
D. 'Caution, Danger' - Answer-C. 'Caution, Radioactive Materials'

Which of the following is described as controlled access area for the protection of
individuals from exposure to radiation and radioactive materials?

A. Radiation area
B. Unrestricted area
C. High radiation area
D. Restricted area - Answer-D. Restricted area

If the radiation intensity from an I-131 therapy patient at 1 meter is 70 mR/hr, at
approximately what distance should a visitor stand to receive an exposure rate of no
more than 2 mR/hr?

A. 2.2
B. 5.9
C. 17.5
D. 35 - Answer-B. 5.9

The dose rate during preparation of a radiopharmaceutical is 1.66 mrem/hr. With this
rate reduced by 3 HVLs, how many hours would it take a worker to accumulate 10
mrems?

A. 6
B. 12
C. 24

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