radiobiology ch. 4 Exam Questions
and Answers 100% Pass
Which of the following was used as the first measure of exposure for ionizing radiation?
A. Air kerma
B. Skin erythema
C. Sievert
D. Roentgen - ✔✔B
A radiation weighting factor (Wr) has been established for each of the following
ionizing radiations: X-rays (Wr=1), fast neutrons (Wr=20), and alpha particles (Wr=20).
What is the total equivalent dose (EqD) in Sieverts for a person who has received the
following exposures: 0.2 Gyt of x-rays, 0.07 Gyt of fast neutrons, and 0.3 Gyt of alpha
particles?
A. 9.4 Sv
B. 7.6 Sv
C. 4.3 Sv
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,D. 1.9 Sv - ✔✔B
Which of the following is the unit of collective effective dose (ColEfD)?
A. Coulombs per kilogram-sievert
B. Gray-Sievert
C. Person-sievert
D. Rad-sievert - ✔✔C
The concept of tissue weighting factor (Wt) is used to do which of the following?
A. Account for the risk to the entire organism brought on by the irradiation of
individual tissue and organs.
B. Eliminate the need for determining effective dose
C. Measure absorbed dose from all different types of ionizing radiations
D. Modify the radiation weighting factor for different types of ionizing radiation - ✔✔A
To convert the number of grays into milligrays, the number of grays must be:
A. Divided by 100
B. Divided by 1000
C. Multiplied by 100
D. Multiplied by 1000 - ✔✔D
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, What does the SI radiation unit coulomb per kilogram measure?
A. Equivalent dose
B. Absorbed dose in biologic tissue
C. Radiation exposure in air only
D. Speed at which x-ray photons travel - ✔✔C
Which of the following radiation quantities accounts for some biologic tissues being
more sensitive to radiation damage than other tissues?
A. Absorbed dose
B. Exposure
C. Equivalent dose
D. Effective dose - ✔✔D
The radiation weighting factor for alpha particles is 20, and the tissue weighting factor
for the lungs is 0.12. If the lungs received an absorbed dose of 0.2 Gyt from exposure to
alpha particles, what is the effective dose in Sieverts?
A. 0.48 Sv
B. 4.8 Sv
C. 48.0 Sv
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and Answers 100% Pass
Which of the following was used as the first measure of exposure for ionizing radiation?
A. Air kerma
B. Skin erythema
C. Sievert
D. Roentgen - ✔✔B
A radiation weighting factor (Wr) has been established for each of the following
ionizing radiations: X-rays (Wr=1), fast neutrons (Wr=20), and alpha particles (Wr=20).
What is the total equivalent dose (EqD) in Sieverts for a person who has received the
following exposures: 0.2 Gyt of x-rays, 0.07 Gyt of fast neutrons, and 0.3 Gyt of alpha
particles?
A. 9.4 Sv
B. 7.6 Sv
C. 4.3 Sv
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,D. 1.9 Sv - ✔✔B
Which of the following is the unit of collective effective dose (ColEfD)?
A. Coulombs per kilogram-sievert
B. Gray-Sievert
C. Person-sievert
D. Rad-sievert - ✔✔C
The concept of tissue weighting factor (Wt) is used to do which of the following?
A. Account for the risk to the entire organism brought on by the irradiation of
individual tissue and organs.
B. Eliminate the need for determining effective dose
C. Measure absorbed dose from all different types of ionizing radiations
D. Modify the radiation weighting factor for different types of ionizing radiation - ✔✔A
To convert the number of grays into milligrays, the number of grays must be:
A. Divided by 100
B. Divided by 1000
C. Multiplied by 100
D. Multiplied by 1000 - ✔✔D
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, What does the SI radiation unit coulomb per kilogram measure?
A. Equivalent dose
B. Absorbed dose in biologic tissue
C. Radiation exposure in air only
D. Speed at which x-ray photons travel - ✔✔C
Which of the following radiation quantities accounts for some biologic tissues being
more sensitive to radiation damage than other tissues?
A. Absorbed dose
B. Exposure
C. Equivalent dose
D. Effective dose - ✔✔D
The radiation weighting factor for alpha particles is 20, and the tissue weighting factor
for the lungs is 0.12. If the lungs received an absorbed dose of 0.2 Gyt from exposure to
alpha particles, what is the effective dose in Sieverts?
A. 0.48 Sv
B. 4.8 Sv
C. 48.0 Sv
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