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
CORRECT 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
CORRECT 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
CORRECT ANSWER
C. Dose Calibrator
Which type of decay is neutron-rich?
A. Beta decay
B. Alpha decay
C. Electron capture
D. Gamma decay
CORRECT ANSWER
A. Beta decay
A survey meter must be calibrated:
A. Daily
B. Weekly
C. Quarterly
D. Annually
CORRECT 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
CORRECT 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
CORRECT 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
CORRECT 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.
CORRECT 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
CORRECT 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
A. Absorbed dose
B. Biological dose
C. Effective dose
D. Dose Equivalent
CORRECT 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
CORRECT 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
CORRECT ANSWER
C. Dose Calibrator
Which type of decay is neutron-rich?
A. Beta decay
B. Alpha decay
C. Electron capture
D. Gamma decay
CORRECT ANSWER
A. Beta decay
A survey meter must be calibrated:
A. Daily
B. Weekly
C. Quarterly
D. Annually
CORRECT 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
CORRECT 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
CORRECT 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
CORRECT 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.
CORRECT 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
CORRECT 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
