The inverse square law, in words, says:
CORRECT ANSWER
if you double the distance from the source of activity, you reduce exposure to 25% of the original
intensity
What is the NRC annual dose limit allowed to the lens of the eye?
CORRECT ANSWER
15 rem
What is the dose rate limit at the package surface for a shipment of radioactive material bearing a
Yellow-III label?
CORRECT ANSWER
200 mR/h
What is the dose rate limit at the surface of a package bearing a DOT Class I White label?
CORRECT ANSWER
0.5 mR/h
According to the NRC, a restricted area is one in which a person would receive a radiation dose of more
than:
CORRECT ANSWER
, 2 mRem in 1 hr
If the radiation intensity was "x" at a distance "d" from a source, what would the radiation intensity be
half of that distance?
CORRECT ANSWER
x^2
The exposure limit for the developing fetus of a declared pregnant worker is:
CORRECT ANSWER
0.5 Rem
The average energy required to create an ion pair in air is:
CORRECT ANSWER
34 eV
Which of the following radiation signs would be required if a survey meter reading were 40 mRem/hr at
60 cm from a source in the room?
CORRECT ANSWER
caution: high radiation area
In doing a room survey, you discover that a therapy patient's room has removable contamination above
acceptable levels. What is the acceptable level?
CORRECT ANSWER
<367 Bq/100 cm^2
CORRECT ANSWER
if you double the distance from the source of activity, you reduce exposure to 25% of the original
intensity
What is the NRC annual dose limit allowed to the lens of the eye?
CORRECT ANSWER
15 rem
What is the dose rate limit at the package surface for a shipment of radioactive material bearing a
Yellow-III label?
CORRECT ANSWER
200 mR/h
What is the dose rate limit at the surface of a package bearing a DOT Class I White label?
CORRECT ANSWER
0.5 mR/h
According to the NRC, a restricted area is one in which a person would receive a radiation dose of more
than:
CORRECT ANSWER
, 2 mRem in 1 hr
If the radiation intensity was "x" at a distance "d" from a source, what would the radiation intensity be
half of that distance?
CORRECT ANSWER
x^2
The exposure limit for the developing fetus of a declared pregnant worker is:
CORRECT ANSWER
0.5 Rem
The average energy required to create an ion pair in air is:
CORRECT ANSWER
34 eV
Which of the following radiation signs would be required if a survey meter reading were 40 mRem/hr at
60 cm from a source in the room?
CORRECT ANSWER
caution: high radiation area
In doing a room survey, you discover that a therapy patient's room has removable contamination above
acceptable levels. What is the acceptable level?
CORRECT ANSWER
<367 Bq/100 cm^2
