, Exposure is measured in units of grays.
4. What is the decimal equivalent of the proper fraction 4/1000?
a. 0004
b. 004
c. 04
d. 4
ANS: B
The decimal equivalent of the proper fraction 4/1000 is .004.
5. What is the decimal equivalent of the improper fraction 289/74?
a. 390
b. 3.90
c. 39.0
d. 390.0
ANS: B
The decimal equivalent of the improper fraction 289/74 is 3.90.
6. The first step to expressing a number in scientific notation is to .
a. round up to the nearest 1000
b. round down to the nearest 1000
c. write the number in decimal form
d. write the number as a fraction
ANS: C
The first step to expressing a number in scientific notation is to write the number in decimal
form.
7. What is 6080 in exponential form?
a. 6080.0 104
b. 608.0 104
c. 6.080 103
d. 6080 103
ANS: C
The number 6080 in exponential form is 6.080 103
8. Graphs are typically based on two axes; a and a .
a. y-axis; z-axis
b. oblique; horizontal
c. x-axis; y-axis
d. vertical; oblique
ANS: C
Most graphs are based on two axes: a horizontal or x-axis and a vertical or y-axis.
9. In radiologic science, all of the following are special quantities, except:
a. exposure.
b. distance.
c. dose.
, d. effective dose.
ANS: B
In radiologic science, special quantities are those of exposure, dose, effective dose, and
radioactivity.
10. Mass density should be reported in which units?
a. Coulomb/kilogram
b. Newtons per square meter
c. Kilograms per cubic meter
d. Kilograms per square meter
ANS: C
Mass density should be reported with units of kilograms per cubic meter (kg/m3).
11. The SI unit of velocity is .
a. meters per second
b. miles per hour
c. meters per millisecond
d. kilometers per second
ANS: C
Units of velocity in SI are meters per second (m/s).
12. An object at rest will if no outside forces are applied.
a. stay at rest
b. decrease mass
c. increase velocity
d. decrease velocity
ANS: A
An object at rest will stay at rest if no outside forces are applied.
13. Which of the following explains the difference between speed and velocity?
a. One has motion, and the other does not.
b. One involves acceleration, and the other does not.
c. One involves time, and the other does not.
d. One has direction, and the other does not.
ANS: B
Velocity includes acceleration and speed does not. Speed is the rate at which an object covers
distance.
14. For every action, there is an equal and opposite reaction, this describes which Newton’s law?
a. Newton’s first law of motion
b. Newton’s second law of motion
c. Newton’s third law of motion
d. Newton’s law of inertia
ANS: C
Newton's third law of motion states that for every action, there is an equal and opposite
reaction.
, 15. Work is the product of and distance.
a. force
b. gravity
c. acceleration
d. motion
ANS: A
Work is the product of force and distance.
16. The transfer of heat by the emission of infrared radiation is .
a. electric radiation
b. magnetic energy
c. mechanical energy
d. thermal radiation
ANS: D
Thermal radiation is the transfer of heat by the emission of infrared radiation.
17. What heat transfer takes place when you burn your finger by touching a hot iron?
a. Conduction
b. Convection
c. Radiation
d. Electromagnetic
ANS: A
Conduction is the transfer of heat through a material or by touching.
18. What heat transfer takes place when water is boiled?
a. Conduction
b. Convection
c. Radiation
d. Electromagnetic
ANS: B
Convection is the mechanical transfer of ―hot‖ molecules in a gas or liquid from one place to
another.
19. What are the two cryogens used in Magnetic resonance imaging with a superconducting
magnet?
a. Gaseous helium and gaseous nitrogen
b. Liquid helium and gaseous nitrogen
c. Gaseous helium and liquid helium
d. Liquid helium and liquid nitrogen
ANS: D
Liquid nitrogen and liquid helium are the two cryogens that are used in magnetic resonance
imaging with a superconducting magnet.
20. When you stretch a rubber band, you are storing _ energy.
a. kinetic
b. potential
c. thermal
4. What is the decimal equivalent of the proper fraction 4/1000?
a. 0004
b. 004
c. 04
d. 4
ANS: B
The decimal equivalent of the proper fraction 4/1000 is .004.
5. What is the decimal equivalent of the improper fraction 289/74?
a. 390
b. 3.90
c. 39.0
d. 390.0
ANS: B
The decimal equivalent of the improper fraction 289/74 is 3.90.
6. The first step to expressing a number in scientific notation is to .
a. round up to the nearest 1000
b. round down to the nearest 1000
c. write the number in decimal form
d. write the number as a fraction
ANS: C
The first step to expressing a number in scientific notation is to write the number in decimal
form.
7. What is 6080 in exponential form?
a. 6080.0 104
b. 608.0 104
c. 6.080 103
d. 6080 103
ANS: C
The number 6080 in exponential form is 6.080 103
8. Graphs are typically based on two axes; a and a .
a. y-axis; z-axis
b. oblique; horizontal
c. x-axis; y-axis
d. vertical; oblique
ANS: C
Most graphs are based on two axes: a horizontal or x-axis and a vertical or y-axis.
9. In radiologic science, all of the following are special quantities, except:
a. exposure.
b. distance.
c. dose.
, d. effective dose.
ANS: B
In radiologic science, special quantities are those of exposure, dose, effective dose, and
radioactivity.
10. Mass density should be reported in which units?
a. Coulomb/kilogram
b. Newtons per square meter
c. Kilograms per cubic meter
d. Kilograms per square meter
ANS: C
Mass density should be reported with units of kilograms per cubic meter (kg/m3).
11. The SI unit of velocity is .
a. meters per second
b. miles per hour
c. meters per millisecond
d. kilometers per second
ANS: C
Units of velocity in SI are meters per second (m/s).
12. An object at rest will if no outside forces are applied.
a. stay at rest
b. decrease mass
c. increase velocity
d. decrease velocity
ANS: A
An object at rest will stay at rest if no outside forces are applied.
13. Which of the following explains the difference between speed and velocity?
a. One has motion, and the other does not.
b. One involves acceleration, and the other does not.
c. One involves time, and the other does not.
d. One has direction, and the other does not.
ANS: B
Velocity includes acceleration and speed does not. Speed is the rate at which an object covers
distance.
14. For every action, there is an equal and opposite reaction, this describes which Newton’s law?
a. Newton’s first law of motion
b. Newton’s second law of motion
c. Newton’s third law of motion
d. Newton’s law of inertia
ANS: C
Newton's third law of motion states that for every action, there is an equal and opposite
reaction.
, 15. Work is the product of and distance.
a. force
b. gravity
c. acceleration
d. motion
ANS: A
Work is the product of force and distance.
16. The transfer of heat by the emission of infrared radiation is .
a. electric radiation
b. magnetic energy
c. mechanical energy
d. thermal radiation
ANS: D
Thermal radiation is the transfer of heat by the emission of infrared radiation.
17. What heat transfer takes place when you burn your finger by touching a hot iron?
a. Conduction
b. Convection
c. Radiation
d. Electromagnetic
ANS: A
Conduction is the transfer of heat through a material or by touching.
18. What heat transfer takes place when water is boiled?
a. Conduction
b. Convection
c. Radiation
d. Electromagnetic
ANS: B
Convection is the mechanical transfer of ―hot‖ molecules in a gas or liquid from one place to
another.
19. What are the two cryogens used in Magnetic resonance imaging with a superconducting
magnet?
a. Gaseous helium and gaseous nitrogen
b. Liquid helium and gaseous nitrogen
c. Gaseous helium and liquid helium
d. Liquid helium and liquid nitrogen
ANS: D
Liquid nitrogen and liquid helium are the two cryogens that are used in magnetic resonance
imaging with a superconducting magnet.
20. When you stretch a rubber band, you are storing _ energy.
a. kinetic
b. potential
c. thermal
