Radiation Safety (AMMO 66) Exam Preparation Newest
With Complete Questions and Correct Detailed Answers|
Brand New Version (2026)
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
With Complete Questions and Correct Detailed Answers|
Brand New Version (2026)
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
