RADIATION PROTECTION EXAM
QUESTIONS AND ANSWERS
Who is required to wear a personnel dosimeter?
A. Anyone who may be exposed to an annual occupational dose of 5 millisieverts (mSv)
B. Anyone who may be exposed to more than 5% of occupational dose limits
C. Anyone who may be exposed to more than 10 millisieverts (mSv) per year
D. Anyone who is occupationally exposed to ionizing radiation should wear a personnel
dosimeter - Answer-A. Anyone who may be exposed to an annual occupational dose of
5 millisieverts (mSv)
Which of the following types of patient shielding devices is suspended from above the
radiographic beam-defining system?
A. Flat contact shield
B. Shadow shield
C. Shaped contact shield
D. Clear lead shield - Answer-B. Shadow shield
When using fluoroscopic equipment, which of the following is directly proportional to the
exposure delivered to the patient?
A. kVp
B. mA
C. Thickness of filter
D. Target-to-panel or target-to-tabletop distance - Answer-B. mA
Two half-value layers would result in a decrease in beam intensity by what percent?
A. 25%
B. 50%
C. 75%
D. 100% - Answer-C. 75%
1 HVL = 50%
2 HVL = 25%
Which of the following would provide fluoroscopic imaging personnel with the best
radiation protection opportunity?
A. Controlling the fluoroscopic system remotely
B. Increased distance from patient
C. Wearing protective shielding
D. Reducing time spent in the fluoroscopic procedure - Answer-A. Controlling the
fluoroscopic system remotely
All of the following are included in a personnel monitoring report except:
A. Total effective dose equivalent
B. Quarterly accumulated dose equivalent
, C. Year to date dose equivalent
D. Lifetime dose equivalent - Answer-A. Total effective dose equivalent
What is the dose equivalent limit for the lens of the eye for occupational workers?
A. 150 mSv
B. 50 mSv
C. 250 mSv
D. 500 mSv - Answer-A. 150 mSv
The main purpose of adding filtration to the x-ray tube is to:
A. Decrease occupational dose
B. Increase spatial resolution
C. Decrease patient dose
D. Increase image contrast - Answer-C. Decrease patient dose
Which of the following is/are included in the total filtration of the x-ray beam? (Select all
that apply)
1. Added filtration
2. Inherent filtration
3. Collimation
4. Gravity filtration - Answer-1. Added filtration
2. Inherent filtration
Which of the following is accomplished with pulsed fluoroscopy? (Select all that apply)
1. Decreased patient dose
2. Extended tube life
3. Continuous activation of the x-ray tube
4. Increased signal-to-noise ratio - Answer-1. Decreased patient dose
2. Extended tube life
Leakage radiation from the x-ray tube is limited to:
A. 1 milligray/hour at 1 meter
B. 1 gray/hour at 2 meters
C. 10 milligray/minute at 1 meter
D. 10 milligray/hour at 2 meters - Answer-A. 1 milligray/hour at 1 meter
Which of the following occurs when a multi-focus image intensifier tube is operated in
magnification mode?
A. Larger area of the input phosphor is used
B. Patient dose will be increased
C. Image quality will be reduced
D. Less voltage is applied to the electrostatic lenses - Answer-B. Patient dose will be
increased
Inherent filtration refers to:
A. Filtration that is not aluminum but is added
QUESTIONS AND ANSWERS
Who is required to wear a personnel dosimeter?
A. Anyone who may be exposed to an annual occupational dose of 5 millisieverts (mSv)
B. Anyone who may be exposed to more than 5% of occupational dose limits
C. Anyone who may be exposed to more than 10 millisieverts (mSv) per year
D. Anyone who is occupationally exposed to ionizing radiation should wear a personnel
dosimeter - Answer-A. Anyone who may be exposed to an annual occupational dose of
5 millisieverts (mSv)
Which of the following types of patient shielding devices is suspended from above the
radiographic beam-defining system?
A. Flat contact shield
B. Shadow shield
C. Shaped contact shield
D. Clear lead shield - Answer-B. Shadow shield
When using fluoroscopic equipment, which of the following is directly proportional to the
exposure delivered to the patient?
A. kVp
B. mA
C. Thickness of filter
D. Target-to-panel or target-to-tabletop distance - Answer-B. mA
Two half-value layers would result in a decrease in beam intensity by what percent?
A. 25%
B. 50%
C. 75%
D. 100% - Answer-C. 75%
1 HVL = 50%
2 HVL = 25%
Which of the following would provide fluoroscopic imaging personnel with the best
radiation protection opportunity?
A. Controlling the fluoroscopic system remotely
B. Increased distance from patient
C. Wearing protective shielding
D. Reducing time spent in the fluoroscopic procedure - Answer-A. Controlling the
fluoroscopic system remotely
All of the following are included in a personnel monitoring report except:
A. Total effective dose equivalent
B. Quarterly accumulated dose equivalent
, C. Year to date dose equivalent
D. Lifetime dose equivalent - Answer-A. Total effective dose equivalent
What is the dose equivalent limit for the lens of the eye for occupational workers?
A. 150 mSv
B. 50 mSv
C. 250 mSv
D. 500 mSv - Answer-A. 150 mSv
The main purpose of adding filtration to the x-ray tube is to:
A. Decrease occupational dose
B. Increase spatial resolution
C. Decrease patient dose
D. Increase image contrast - Answer-C. Decrease patient dose
Which of the following is/are included in the total filtration of the x-ray beam? (Select all
that apply)
1. Added filtration
2. Inherent filtration
3. Collimation
4. Gravity filtration - Answer-1. Added filtration
2. Inherent filtration
Which of the following is accomplished with pulsed fluoroscopy? (Select all that apply)
1. Decreased patient dose
2. Extended tube life
3. Continuous activation of the x-ray tube
4. Increased signal-to-noise ratio - Answer-1. Decreased patient dose
2. Extended tube life
Leakage radiation from the x-ray tube is limited to:
A. 1 milligray/hour at 1 meter
B. 1 gray/hour at 2 meters
C. 10 milligray/minute at 1 meter
D. 10 milligray/hour at 2 meters - Answer-A. 1 milligray/hour at 1 meter
Which of the following occurs when a multi-focus image intensifier tube is operated in
magnification mode?
A. Larger area of the input phosphor is used
B. Patient dose will be increased
C. Image quality will be reduced
D. Less voltage is applied to the electrostatic lenses - Answer-B. Patient dose will be
increased
Inherent filtration refers to:
A. Filtration that is not aluminum but is added
