RAD 216 Final Exam Review
____ is defined as the number of waves that pass a given point
per second. Correct Answers freqency
_____ is the property of an element in a circuit that impedes the
flow of electrons Correct Answers resistance
______ occurs when an object gains a net positive or net
negative charge Correct Answers electrification
__________ induction is a type of electromagnetic induction
that takes place when there is only one coil of wire.
a. self
b. magnetic
c. mutual
d. auto Correct Answers self
_____________ is an increase in the brightness of the
fluoroscopic image in the image intensifier due to the difference
between the size of the input screen and the size of the output
screen.
a. minification gain
b. flux gain
c. total brightness gain
d. brightness control Correct Answers minification gain
_____________ is the process of outer-shell electrons being
"boiled off" and ejected from the filament.
a. thermionic emission
b. tungsten vaporization
,c. electron arcing Correct Answers thermionic emission
_______________ is the person credited with describing
electromagnetic induction and the variables that determine the
strength of the new current. Correct Answers faraday
A _____ is a material that has a few free electrons and is a poor
conductor of electricity Correct Answers insulator
A _____ quantity is one that represents a combination of
fundamental quantities. Correct Answers derived
A _________ converts electrical energy to mechanical energy.
a. induction motor
b. generator
c. transformer
d. rectifier Correct Answers induction motor
A ____________ is a device that can be used to convert light
image from the image intensifier into an electrical signal that is
sent to the TV monitor.
a. picture tube
b. TV camera tube
c. electron lens
d. cathode ray tube Correct Answers TV camera tube
A 1-tesla MRI device operates at a radio-frequency of 42 MHz
(42,000,000 HZ). What is the wavelength of this radiation?
Correct Answers 7.1
A beam alignment test performed at 40" SID
,indicates that the alignment between
the x-ray field and Bucky tray is off
by 1/2 of an inch. Is this within the
acceptance range? Correct Answers No
A CCD is added to the CR reader to convert Correct Answers
light to an electrical signal
A department is found to have an annual repeat
rate of 10%. Is this within acceptable limits? Correct Answers
No
A device that changes voltage from high to low or low to high is
a:
a. generator
b. rectifier
c. transformer
d. battery Correct Answers transformer
A dual focus tube has two _____________.
a. rotors
b. filaments
c. anode angles
d. anode discs Correct Answers filaments
A focal spot is listed as 1.5mm but is measuring 1.7mm is this
acceptable Correct Answers yes
A form of particulate radiation that is an electron emitted from
an unstable nucleus is a ______________. Correct Answers
beta
, A graph of all the pixel values and their frequency Correct
Answers histogram
A graph of the pixel values of a digital image and
their frequency is called a: Correct Answers Histogram
A grid-controlled tube allows for _______ floroscopy Correct
Answers pulsed
A group of aligned magnetic dipoles is called a:
a. magnetic pole
b. ferromagnet
c. magnetic flux
d. magnetic domain Correct Answers magnetic domain
A loss of brightness at the peripheral borders due to a curved
input screen is called:
a. vignetting
b. noise
c. distortion
d. lag Correct Answers vignetting
a lower DQU results in _______ patient dose Correct Answers
higher
A lower sampling frequency is better for spatial resolution
Correct Answers false
A magnetic ____ is a group of atomic magnets with their dipoles
aligned Correct Answers domain
____ is defined as the number of waves that pass a given point
per second. Correct Answers freqency
_____ is the property of an element in a circuit that impedes the
flow of electrons Correct Answers resistance
______ occurs when an object gains a net positive or net
negative charge Correct Answers electrification
__________ induction is a type of electromagnetic induction
that takes place when there is only one coil of wire.
a. self
b. magnetic
c. mutual
d. auto Correct Answers self
_____________ is an increase in the brightness of the
fluoroscopic image in the image intensifier due to the difference
between the size of the input screen and the size of the output
screen.
a. minification gain
b. flux gain
c. total brightness gain
d. brightness control Correct Answers minification gain
_____________ is the process of outer-shell electrons being
"boiled off" and ejected from the filament.
a. thermionic emission
b. tungsten vaporization
,c. electron arcing Correct Answers thermionic emission
_______________ is the person credited with describing
electromagnetic induction and the variables that determine the
strength of the new current. Correct Answers faraday
A _____ is a material that has a few free electrons and is a poor
conductor of electricity Correct Answers insulator
A _____ quantity is one that represents a combination of
fundamental quantities. Correct Answers derived
A _________ converts electrical energy to mechanical energy.
a. induction motor
b. generator
c. transformer
d. rectifier Correct Answers induction motor
A ____________ is a device that can be used to convert light
image from the image intensifier into an electrical signal that is
sent to the TV monitor.
a. picture tube
b. TV camera tube
c. electron lens
d. cathode ray tube Correct Answers TV camera tube
A 1-tesla MRI device operates at a radio-frequency of 42 MHz
(42,000,000 HZ). What is the wavelength of this radiation?
Correct Answers 7.1
A beam alignment test performed at 40" SID
,indicates that the alignment between
the x-ray field and Bucky tray is off
by 1/2 of an inch. Is this within the
acceptance range? Correct Answers No
A CCD is added to the CR reader to convert Correct Answers
light to an electrical signal
A department is found to have an annual repeat
rate of 10%. Is this within acceptable limits? Correct Answers
No
A device that changes voltage from high to low or low to high is
a:
a. generator
b. rectifier
c. transformer
d. battery Correct Answers transformer
A dual focus tube has two _____________.
a. rotors
b. filaments
c. anode angles
d. anode discs Correct Answers filaments
A focal spot is listed as 1.5mm but is measuring 1.7mm is this
acceptable Correct Answers yes
A form of particulate radiation that is an electron emitted from
an unstable nucleus is a ______________. Correct Answers
beta
, A graph of all the pixel values and their frequency Correct
Answers histogram
A graph of the pixel values of a digital image and
their frequency is called a: Correct Answers Histogram
A grid-controlled tube allows for _______ floroscopy Correct
Answers pulsed
A group of aligned magnetic dipoles is called a:
a. magnetic pole
b. ferromagnet
c. magnetic flux
d. magnetic domain Correct Answers magnetic domain
A loss of brightness at the peripheral borders due to a curved
input screen is called:
a. vignetting
b. noise
c. distortion
d. lag Correct Answers vignetting
a lower DQU results in _______ patient dose Correct Answers
higher
A lower sampling frequency is better for spatial resolution
Correct Answers false
A magnetic ____ is a group of atomic magnets with their dipoles
aligned Correct Answers domain
