Bushong: Radiologic Science for Technologists, 12th Edition

Chapter 01: Essential Concepts of Radiologic Science

Bushong: Radiologic Science for Technologists, 12th Edition
MULTIPLE CHOICE

1. Matter is measured in ___________.
a. kilograms
b. joules
c. electron volts
d. rems



ANS: A
Matter is measured in kilograms.

2. Atoms and molecules are the fundamental building blocks of ___________. a. energy
b. radiation
c. matter
d. gravity



ANS: C
Atoms and molecules are the fundamental building blocks of matter.

3. Ice and steam are examples of two forms of ___________.
a. matter
b. radiation
c. energy
d. work



ANS: A
Ice and steam are examples of two forms of matter.

4. The formula E = mc2 is the basis for the theory that led to the development of __________. a. x-
rays
b. electromagnetic radiation
c. nuclear power
d. cathode ray tubes



ANS: C

, The formula E = mc2 is the basis for the theory that led to the development of nuclear power.

5. Radio waves, light, and x-rays are all examples of _________ energy.
a. nuclear
b. thermal
c. electrical
d. electromagnetic



ANS: D
Electromagnetic energy includes radio waves, light, and x-rays as well as other parts of the
spectrum.

6. A moving object has ____________ energy.
a. potential
b. kinetic
c. nuclear
d. electromagnetic



ANS: B
A moving object has kinetic energy.

7. What is the removal of an electron from an atom called?
a. Ionization
b. Pair production
c. Irradiation
d. Electricity



ANS: A
The removal of an electron from an atom is called ionization.

8. Ionizing radiation is capable of removing ____________ from atoms as it passes through the
matter.
a. neutrons
b. protons
c. electrons
d. ions



ANS: C

, Ionizing radiation is capable of removing electrons from atoms as it passes through the matter.

9. The energy of x-rays is ___________.
a. thermal
b. potential
c. kinetic
d. electromagnetic



ANS: D
X-rays are a form of electromagnetic energy.

10. The biggest source of man-made ionizing radiation exposure to the public is ______________.
a. atomic fallout
b. diagnostic x-rays
c. smoke detectors
d. nuclear power plants



ANS: B
Medical x-ray exposure is the biggest source of man-made radiation.

11. In the United States, we are exposed to _________ mSv/year of ionizing radiation from the
natural environment. a. 0 to 5
b. 5 to 20
c. 20 to 90
d. 100 to 300



ANS: A
We are exposed to about 3 mSv/yr of ionizing radiation from natural environmental sources in
the United States.

12. ___________ is a special quantity of radiologic science.
a. Mass
b. Velocity
c. Radioactivity
d. Momentum



ANS: C
Radioactivity is a special quantity of radiologic science.

, 13. Today, radiology is considered to be a(n) ___________ occupation. a. safe
b. unsafe
c. dangerous
d. high-risk



ANS: A
Today, radiology is considered to be a safe occupation because of effective radiation
protection practices.

14. What does ALARA mean?
a. All Level Alert Radiation Accident
b. As Low As Reasonably Achievable
c. Always Leave A Restricted Area
d. As Low As Regulations Allow



ANS: B
ALARA means As Low As Reasonably Achievable.

15. Computed tomography was developed in the ________.
a. 1890s
b. 1920s
c. 1970s
d. 1990s



ANS: C
Computed tomography was developed in the 1970s.

16. Filtration is used to ____________________.
a. absorb low-energy x-rays
b. remove high-energy x-rays
c. restrict the useful beam to the body part imaged
d. fabricate gonadal shields



ANS: A
Filtration is used to absorb low-energy x-rays.