RADIATION PROTECTION CHAPTER 4
EXAM QUESTIONS AND ANSWERS
Which of the following factors must be multiplied to determine the EfD from an x-
radiation exposure of an organ or body part?
A. EqD x Wr x D
B. Wt x Wr x ColEfD
C. D x Wr x Wt
D. D x C/kg - Answer- C. D x Wr x Wt
Which of the following is the SI unit of radiation exposure that is used for x-ray
equipment calibration?
A. C/kg
B. DAP
C. R
D. Sv - Answer- A. C/kg
The expression 10(-6) may be symbolically expressed as which of the following?
A. P
B. W
C. S
D. m - Answer- D. m
In radiation protection systems no longer in use, a radiation dose to which
occupationally exposed persons could be continously subjected without any
apparent harmful acute effects, such as erythema of the skin, was known as a(n):
A. Air Kerma
B. Effective dose
C. Tolerance dose
D. Weighted dose - Answer- C. Tolerance dose
Early deterministic somatic effects of radiation include:
1. Nausea and fatigue
2. Blood and intestinal disorders
3. Diffuse redness of the skin and shedding of its outer layer.
A. 1 and 2 only
B. 1 and 3 only
C. 2 and 3 only
D. 1, 2, and 3 - Answer- D. 1, 2, and 3
Which of the following terms describes the amount of energy per unit mass
transferred from an x-ray beam to an object in its path such as the human body?
, A. SI
B. Exposure
C. Equivalent dose
D. Absorbed dose - Answer- D. Absorbed dose
The total amount of radiant energy transferred by ionizing radiation to the body
during a radiation exposure defines:
A. Dose area product
B. Effective dose
C. Surface integral dose
D. Total effective dose equivalent - Answer- C. Surface integral dose
Fluoroscopic entrance dose rates can now be measured in:
A. keV/mm
B. mGy-cm2
C. mGya/min
D. Person-sievert - Answer- C. mGya/min
The EfD is based on which of the following?
A. The energy deposited in biologic tissue by ionizing radiation.
B. The electrical charge produced in a kilogram of dry air by ionizing radiation.
C. The dose of ionizing radiation required to cause diffuse redness over an area of
skin.
D. The number of electron-ion pairs in a specific volume of air. - Answer- A. The
energy deposited in biologic tissue by ionizing radiation.
In radiation protection, which of the following is a measure of the probabilistic health
effect on an individual as a result of an intake of radioactive material into the body?
A. TEDE
B. Gyt
C. Gya
D. CEDE - Answer- D. CEDE
Which of the following radiation quantities can be used to compare the average
amount of radiation received by the entire body from a specific radiologic
examination with the amount received from natural background radiation?
A. D
B. EfD
C. EqD
D. ColEfD - Answer- B. EfD
Which of the following radiation quantities is used to describe exposure of a
population or group from low doses of different sources of ionizing radiation?
A. D
B. EqD
EXAM QUESTIONS AND ANSWERS
Which of the following factors must be multiplied to determine the EfD from an x-
radiation exposure of an organ or body part?
A. EqD x Wr x D
B. Wt x Wr x ColEfD
C. D x Wr x Wt
D. D x C/kg - Answer- C. D x Wr x Wt
Which of the following is the SI unit of radiation exposure that is used for x-ray
equipment calibration?
A. C/kg
B. DAP
C. R
D. Sv - Answer- A. C/kg
The expression 10(-6) may be symbolically expressed as which of the following?
A. P
B. W
C. S
D. m - Answer- D. m
In radiation protection systems no longer in use, a radiation dose to which
occupationally exposed persons could be continously subjected without any
apparent harmful acute effects, such as erythema of the skin, was known as a(n):
A. Air Kerma
B. Effective dose
C. Tolerance dose
D. Weighted dose - Answer- C. Tolerance dose
Early deterministic somatic effects of radiation include:
1. Nausea and fatigue
2. Blood and intestinal disorders
3. Diffuse redness of the skin and shedding of its outer layer.
A. 1 and 2 only
B. 1 and 3 only
C. 2 and 3 only
D. 1, 2, and 3 - Answer- D. 1, 2, and 3
Which of the following terms describes the amount of energy per unit mass
transferred from an x-ray beam to an object in its path such as the human body?
, A. SI
B. Exposure
C. Equivalent dose
D. Absorbed dose - Answer- D. Absorbed dose
The total amount of radiant energy transferred by ionizing radiation to the body
during a radiation exposure defines:
A. Dose area product
B. Effective dose
C. Surface integral dose
D. Total effective dose equivalent - Answer- C. Surface integral dose
Fluoroscopic entrance dose rates can now be measured in:
A. keV/mm
B. mGy-cm2
C. mGya/min
D. Person-sievert - Answer- C. mGya/min
The EfD is based on which of the following?
A. The energy deposited in biologic tissue by ionizing radiation.
B. The electrical charge produced in a kilogram of dry air by ionizing radiation.
C. The dose of ionizing radiation required to cause diffuse redness over an area of
skin.
D. The number of electron-ion pairs in a specific volume of air. - Answer- A. The
energy deposited in biologic tissue by ionizing radiation.
In radiation protection, which of the following is a measure of the probabilistic health
effect on an individual as a result of an intake of radioactive material into the body?
A. TEDE
B. Gyt
C. Gya
D. CEDE - Answer- D. CEDE
Which of the following radiation quantities can be used to compare the average
amount of radiation received by the entire body from a specific radiologic
examination with the amount received from natural background radiation?
A. D
B. EfD
C. EqD
D. ColEfD - Answer- B. EfD
Which of the following radiation quantities is used to describe exposure of a
population or group from low doses of different sources of ionizing radiation?
A. D
B. EqD
