RADIATION SAFETY FINAL EXAM
2026/2027 QUESTIONS AND DETAILED
CORRECT ANSWERS | A+ GRADE
In most tubes _________________ is used as an exit port
for the x-radiation enery Correct Answer Beryllium
Raising the kilovolts on the control panel affects the:
Correct Answer Penetrating capabilities of the X-ray
produced
Sources which have been double encapsulated to prevent
the release of radioactive material are called
______________. Correct Answer Special Form
The reading for the Transport Index of a shipping
container should be taken how far from the surface?
Correct Answer 1 meter
The RQ label placed on a transport package indentifies
radioactive material package as: Correct Answer
Reportable Quality
A radiographic exposure device that has a radiation level
of 35 mR/hr at the surface and less than 1 mR/hr at one
meter should be labeled as: Correct Answer Yelow II
Upon receiving a 100 curie IR-192 source, you note that
the reading at the surface of the exposure device is 65
,mR/hr and the Transport Index is 1. What label would you
need to affix to the exposure device? Correct Answer
Yellow III
What is the radiation intensity at 15' from a 30 curie Co-60
source while using a 4HVL collimator? (Emissivity for Co-
60 is 14R/hr/ @ 1') Correct Answer 116 mR/hr
If the intensity 20 feet from Iridium 192 souce is 30 mR/hr,
what is the activity of the source? (Emissivity for IR-192 is
5.2R/h/c@1') Correct Answer 2.3 curies
What dose would a person receive standing 50 feet from a
35 curies Iridium 192 source during a 35 minute
exposure? Correct Answer 42 mR
At what distance would you receive an exposure of 2
millirems if using a 90 curie Iridium 192 source with a 4
HVL collimator during a 10 minute shot? (Emissivity for IR-
192 is 5.2 R/h/C@1 foot) Correct Answer 49 feet
You are working 15 feet away from a radioactive source
and your survey meter reads 75 mR/hr. How far way from
the source would you have to be for your survey meter to
read 2mR/hr? Correct Answer 92 feet
20 feet from the source, your survey meter reads 50
mR/hr. How far do you need to be from the source to
achieve a 2mR/hr dose rate? Correct Answer 100 feet
, You're receiving 177 mR/hr during a 4 minute exposure.
What would your pocket dosimeter read? Correct Answer
12 mR
If you used 1" of lead as shielding, with a cobalt-60
source, how much of the original intensity of the beam
would remain? (HVL for lead with Co-60 is .49") Correct
Answer 1/4
A source of Ir-192 has an activity of 20 curies today. What
will be it's activity at the end of 5 months? (Half-life of Ir-
192=75 days or 2 1/2 months). Correct Answer 5 curies
How long would it takes for a 10 curies Co-60 source to
decay to 2-1/2 curies? (Half-life for Co-60 is 5.3 years)
Correct Answer 10.6 years
When must a vehicle be placarded? Correct Answer When
transporting Radioactive Yellow III material
Any state with which the U.S. Nuclear regulatory
commission or the U.S. Atomic energy commission has
entered into an effective agreement is called a
__________________________. Correct Answer
Agreement State
How often should field audits for performance be
performed an radiographers? Correct Answer At least
every 6 months
2026/2027 QUESTIONS AND DETAILED
CORRECT ANSWERS | A+ GRADE
In most tubes _________________ is used as an exit port
for the x-radiation enery Correct Answer Beryllium
Raising the kilovolts on the control panel affects the:
Correct Answer Penetrating capabilities of the X-ray
produced
Sources which have been double encapsulated to prevent
the release of radioactive material are called
______________. Correct Answer Special Form
The reading for the Transport Index of a shipping
container should be taken how far from the surface?
Correct Answer 1 meter
The RQ label placed on a transport package indentifies
radioactive material package as: Correct Answer
Reportable Quality
A radiographic exposure device that has a radiation level
of 35 mR/hr at the surface and less than 1 mR/hr at one
meter should be labeled as: Correct Answer Yelow II
Upon receiving a 100 curie IR-192 source, you note that
the reading at the surface of the exposure device is 65
,mR/hr and the Transport Index is 1. What label would you
need to affix to the exposure device? Correct Answer
Yellow III
What is the radiation intensity at 15' from a 30 curie Co-60
source while using a 4HVL collimator? (Emissivity for Co-
60 is 14R/hr/ @ 1') Correct Answer 116 mR/hr
If the intensity 20 feet from Iridium 192 souce is 30 mR/hr,
what is the activity of the source? (Emissivity for IR-192 is
5.2R/h/c@1') Correct Answer 2.3 curies
What dose would a person receive standing 50 feet from a
35 curies Iridium 192 source during a 35 minute
exposure? Correct Answer 42 mR
At what distance would you receive an exposure of 2
millirems if using a 90 curie Iridium 192 source with a 4
HVL collimator during a 10 minute shot? (Emissivity for IR-
192 is 5.2 R/h/C@1 foot) Correct Answer 49 feet
You are working 15 feet away from a radioactive source
and your survey meter reads 75 mR/hr. How far way from
the source would you have to be for your survey meter to
read 2mR/hr? Correct Answer 92 feet
20 feet from the source, your survey meter reads 50
mR/hr. How far do you need to be from the source to
achieve a 2mR/hr dose rate? Correct Answer 100 feet
, You're receiving 177 mR/hr during a 4 minute exposure.
What would your pocket dosimeter read? Correct Answer
12 mR
If you used 1" of lead as shielding, with a cobalt-60
source, how much of the original intensity of the beam
would remain? (HVL for lead with Co-60 is .49") Correct
Answer 1/4
A source of Ir-192 has an activity of 20 curies today. What
will be it's activity at the end of 5 months? (Half-life of Ir-
192=75 days or 2 1/2 months). Correct Answer 5 curies
How long would it takes for a 10 curies Co-60 source to
decay to 2-1/2 curies? (Half-life for Co-60 is 5.3 years)
Correct Answer 10.6 years
When must a vehicle be placarded? Correct Answer When
transporting Radioactive Yellow III material
Any state with which the U.S. Nuclear regulatory
commission or the U.S. Atomic energy commission has
entered into an effective agreement is called a
__________________________. Correct Answer
Agreement State
How often should field audits for performance be
performed an radiographers? Correct Answer At least
every 6 months
