ALMS RADIATION SAFETY FINAL PAPER EXAM
2026 FULL QUESTIONS AND CORRECT
ANSWERS GRADED A+
◉ 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
2026 FULL QUESTIONS AND CORRECT
ANSWERS GRADED A+
◉ 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
