Radiation Biology Chapter 7 Exam Questions and Answers With Verified
Solutions 2025
1. The function of a filter is to remove which of the following from the x-ray beam?
a. short wavelength radiation c. secondary radiation
b. long wavelength radiation d. scattered radiation - ✔✔ANS: B
2. Which of the following is the best type of gonadal shield to use during a sterile field procedure?
a. flat contact c. shaped contact
b. shadow d. lead sheet - ✔✔ANS: B
3. A fluoroscope must be equipped with a cumulative timing device which times the radiation exposure
and sounds an audible alarm after the fluoroscope has been energized for
a. 1 minute c. 3 minutes
b. 2 minutes d. 5 minutes - ✔✔ANS: D
4. Which of the following is not a type of beam limitation device?
a. collimator c. filter
b. cone d. aperture diaphragm - ✔✔ANS: C
5. The minimum source-to-tabletop distance permitted in mobile fluoroscopy is
a. 4 inches c. 12 inches
b. 9 inches d. 15 inches - ✔✔ANS: C
6. Which of the following is the most versatile type of x-ray beam limitation device?
a. aperture diaphragm c. cylinder
b. cone d. collimator - ✔✔ANS: D
7. Which of the following combinations would reduce patient radiation dose during an x-ray exam?
, a. higher kVp, lower mAs, increased filtration
b. lower kVp, higher mAs, decreased filtration
c. higher kVp, higher mAs, decreased filtration
d. lower kVp, lower mAs, increased filtration - ✔✔ANS: A
8. Patient dose decreases when
a. high-speed radiographic film is used in combination with high-speed intensifying screens
b. rare-earth intensifying screens are not used
c. low kVp techniques are used
d. non-screen film is used - ✔✔ANS: A
9. The minimum source-to-tabletop distance permitted for fixed fluoroscopes is
a. 6 c. 15
b. 12 d. 20 - ✔✔ANS: C
10. To within what percent of the SID must the collimator light and actual irradiated area be accurate?
a. 2% c. 10%
b. 5% d. 25% - ✔✔ANS: A
11. The greatest beam limitation is accomplished when the cone/cylinder is _____, and the diameter
opening is _____.
a. shorter, bigger c. longer, bigger
b. shorter, smaller d. longer, smaller - ✔✔ANS: D
12. How much total filtration is required when using over 70 kVp?
a. 1.5 mm A c. 3.0 mm Al
b. 2.5 mm Al d. 4.0 mm Al - ✔✔ANS: B
Solutions 2025
1. The function of a filter is to remove which of the following from the x-ray beam?
a. short wavelength radiation c. secondary radiation
b. long wavelength radiation d. scattered radiation - ✔✔ANS: B
2. Which of the following is the best type of gonadal shield to use during a sterile field procedure?
a. flat contact c. shaped contact
b. shadow d. lead sheet - ✔✔ANS: B
3. A fluoroscope must be equipped with a cumulative timing device which times the radiation exposure
and sounds an audible alarm after the fluoroscope has been energized for
a. 1 minute c. 3 minutes
b. 2 minutes d. 5 minutes - ✔✔ANS: D
4. Which of the following is not a type of beam limitation device?
a. collimator c. filter
b. cone d. aperture diaphragm - ✔✔ANS: C
5. The minimum source-to-tabletop distance permitted in mobile fluoroscopy is
a. 4 inches c. 12 inches
b. 9 inches d. 15 inches - ✔✔ANS: C
6. Which of the following is the most versatile type of x-ray beam limitation device?
a. aperture diaphragm c. cylinder
b. cone d. collimator - ✔✔ANS: D
7. Which of the following combinations would reduce patient radiation dose during an x-ray exam?
, a. higher kVp, lower mAs, increased filtration
b. lower kVp, higher mAs, decreased filtration
c. higher kVp, higher mAs, decreased filtration
d. lower kVp, lower mAs, increased filtration - ✔✔ANS: A
8. Patient dose decreases when
a. high-speed radiographic film is used in combination with high-speed intensifying screens
b. rare-earth intensifying screens are not used
c. low kVp techniques are used
d. non-screen film is used - ✔✔ANS: A
9. The minimum source-to-tabletop distance permitted for fixed fluoroscopes is
a. 6 c. 15
b. 12 d. 20 - ✔✔ANS: C
10. To within what percent of the SID must the collimator light and actual irradiated area be accurate?
a. 2% c. 10%
b. 5% d. 25% - ✔✔ANS: A
11. The greatest beam limitation is accomplished when the cone/cylinder is _____, and the diameter
opening is _____.
a. shorter, bigger c. longer, bigger
b. shorter, smaller d. longer, smaller - ✔✔ANS: D
12. How much total filtration is required when using over 70 kVp?
a. 1.5 mm A c. 3.0 mm Al
b. 2.5 mm Al d. 4.0 mm Al - ✔✔ANS: B
