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Radiation Safety Exam Questions With Correct
Answers 100% Verified.
Radiation protection standards are written from the following model: - Answer✔Linear non-
threshold model
General fluoroscopy is limited to a maximum entrance skin exposure rate of - Answer✔100
mGy/min
Exposure and air kerma measure: - Answer✔Raadiation in the air
Diagnostic x-rays can be correctly described as: - Answer✔Low energy, Low LET
"ESE" is an acronym referring to: - Answer✔Entrance skin exposure
The thickness of a half-value layer is dependent on which of the following?
1. Shielding material
2. X-ray energy
3. SID of the beam - Answer✔1. shielding material & 2. x-ray energy
The OER for x-rays is - Answer✔3
What is the dose equivalent limit for the lens of the eye for occupational workers in radiation? -
Answer✔150 mSv
KERMA is an acronym that stands for: - Answer✔Kinetic Energy Released per unit Mass
Effective dose (EfD) may be the product of which of the following?
1. Absorbed dose (D)
2. Radiation Weighting Factor (WR)
3. Tissue Weighting Factor (WT) - Answer✔1. Absorbed dose (D), 2. Radiation weighting factor
(WR) & 3. Tissue weighting factor (WT)
1
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 11:09PM. A+
"LET" stands for - Answer✔Linear energy transfer
A decrease in oxygen content is called: - Answer✔Hypoxia
The amount of ionization that occurs from a radiation exposure is directly related to:
1. Type of radiation
2. Energy of the radiation
3. Charge of the radiation - Answer✔1. Type of radiation, 2. Energy of the radiation & 3. Charge
of the radiation
Which of the following beam restricting devices would be the simplest?
a. Collimator
b. Cone
c. Aperature diaphragm
d. Cylinder - Answer✔c. Aperture diaphragm
Ionizations in air is best expressed by using what SI unit? - Answer✔Coulomb/kg
The Law of Bergonie and Tribondeau defines all of the cells as being especially sensitive to
radiation EXCEPT:
a. Immature cells
b. Undifferentiated cells
c. Rapidly dividing cells
d. Mature cells - Answer✔d. Mature cells
Double strand breaks in DNA can result in:
1. Cancer
2. Genetic effects
3. Cell death - Answer✔1. Cancer, 2. Genetic effects, & 3. Cell death
LD50/60 refers to the lethal dose of radiation that will _____ of the human population within
_____ without medical attention. - Answer✔kill 50%; 60 days
Epilation may begin to occur in most people following a radiation exposure of at least: -
Answer✔3000 mGy
Which of the following are types of ionizing radiation?
2
Radiation Safety Exam Questions With Correct
Answers 100% Verified.
Radiation protection standards are written from the following model: - Answer✔Linear non-
threshold model
General fluoroscopy is limited to a maximum entrance skin exposure rate of - Answer✔100
mGy/min
Exposure and air kerma measure: - Answer✔Raadiation in the air
Diagnostic x-rays can be correctly described as: - Answer✔Low energy, Low LET
"ESE" is an acronym referring to: - Answer✔Entrance skin exposure
The thickness of a half-value layer is dependent on which of the following?
1. Shielding material
2. X-ray energy
3. SID of the beam - Answer✔1. shielding material & 2. x-ray energy
The OER for x-rays is - Answer✔3
What is the dose equivalent limit for the lens of the eye for occupational workers in radiation? -
Answer✔150 mSv
KERMA is an acronym that stands for: - Answer✔Kinetic Energy Released per unit Mass
Effective dose (EfD) may be the product of which of the following?
1. Absorbed dose (D)
2. Radiation Weighting Factor (WR)
3. Tissue Weighting Factor (WT) - Answer✔1. Absorbed dose (D), 2. Radiation weighting factor
(WR) & 3. Tissue weighting factor (WT)
1
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 11:09PM. A+
"LET" stands for - Answer✔Linear energy transfer
A decrease in oxygen content is called: - Answer✔Hypoxia
The amount of ionization that occurs from a radiation exposure is directly related to:
1. Type of radiation
2. Energy of the radiation
3. Charge of the radiation - Answer✔1. Type of radiation, 2. Energy of the radiation & 3. Charge
of the radiation
Which of the following beam restricting devices would be the simplest?
a. Collimator
b. Cone
c. Aperature diaphragm
d. Cylinder - Answer✔c. Aperture diaphragm
Ionizations in air is best expressed by using what SI unit? - Answer✔Coulomb/kg
The Law of Bergonie and Tribondeau defines all of the cells as being especially sensitive to
radiation EXCEPT:
a. Immature cells
b. Undifferentiated cells
c. Rapidly dividing cells
d. Mature cells - Answer✔d. Mature cells
Double strand breaks in DNA can result in:
1. Cancer
2. Genetic effects
3. Cell death - Answer✔1. Cancer, 2. Genetic effects, & 3. Cell death
LD50/60 refers to the lethal dose of radiation that will _____ of the human population within
_____ without medical attention. - Answer✔kill 50%; 60 days
Epilation may begin to occur in most people following a radiation exposure of at least: -
Answer✔3000 mGy
Which of the following are types of ionizing radiation?
2
