1|Page
LMRT ARRT Exam 2025/ 2026 – Limited Scope of
Practice Radiography Test Prep with Real Questions
and Correct Answers||Latest Exam!!!
Roentgen discovered x-rays while working with a _____
tube? - Answer-Crookes
An "electron cloud" surrounding the filament of the
cathode is referred to as a - Answer-Space charge
Free electrons of X-ray production come from the -
Answer-Filament
The creation of the space charge in the X-ray tube
produces: - Answer-thermionic emission
The majority of photons in the X-ray beam are created by
which process? - Answer-Bremsstrahlung interactions
More than 99% of the energy of the electron stream is
converted into: - Answer-heat
,2|Page
the high-speed rotation (10,000 rpm) of the anode enables
- Answer-Greater dissipation of heat from high technical
factors
The degree of angulation of the x-ray tube target will
determine the: - Answer-size of the actual and effective
focal spot
A dual-focus X-ray tube has:
1: Two filaments
2: Two focal spot sizes
3: Two anodes - Answer-1 and 2
The anode heel effect is a phenomenon of X-ray
production that results in: - Answer-Uneven distribution of
radiation within the x-ray field
The penetrating power of the X-ray beam is controlled by
varying the - Answer-Peak kilovoltage (kVp)
,3|Page
The rate flow of current flow across the X-ray tube is
measured in - Answer-mA
Doubling the mA will result in
1: increased patient dose
2: twice as many photons in the X-ray beam
3: increased radiographic density - Answer-1, 2, and 3
The unit used to indicate the total quantity of X-ray expose
is - Answer-Millionsampere-seconds (mAs)
The device for removing long-wavelength radiation from
the primary X-ray beam is the - Answer-Filter
X-ray equipment capable of producing 70 kVp or more is
required to have total filtration of at least: - Answer-2.5 mm
Al equiv
The purpose of rotating the anode of the X-ray tube is to -
Answer-Increase the heat capacity of the anode
, 4|Page
Image sharpness is determined by the - Answer-Size of
the effective focal spot
Above 70 kVp, what percentage of photons is created by
the bremsstrahlung process? - Answer-85%
The amount detail seen in the X-ray image is referred to
as - Answer-spatial resolution
Of what material is the filament made? - Answer-Tungsten
Of what material is the target/anode made? - Answer-
Tungsten
What is added to port to remove the long-wavelength
radiation? - Answer-aluminum filtration
What is the term used to describe the heating of a element
to a hot temperature and the expanding of the electrons in
a atom? - Answer-Thermionic emission
The cathode side of the X-ray tube is - Answer-Negative
LMRT ARRT Exam 2025/ 2026 – Limited Scope of
Practice Radiography Test Prep with Real Questions
and Correct Answers||Latest Exam!!!
Roentgen discovered x-rays while working with a _____
tube? - Answer-Crookes
An "electron cloud" surrounding the filament of the
cathode is referred to as a - Answer-Space charge
Free electrons of X-ray production come from the -
Answer-Filament
The creation of the space charge in the X-ray tube
produces: - Answer-thermionic emission
The majority of photons in the X-ray beam are created by
which process? - Answer-Bremsstrahlung interactions
More than 99% of the energy of the electron stream is
converted into: - Answer-heat
,2|Page
the high-speed rotation (10,000 rpm) of the anode enables
- Answer-Greater dissipation of heat from high technical
factors
The degree of angulation of the x-ray tube target will
determine the: - Answer-size of the actual and effective
focal spot
A dual-focus X-ray tube has:
1: Two filaments
2: Two focal spot sizes
3: Two anodes - Answer-1 and 2
The anode heel effect is a phenomenon of X-ray
production that results in: - Answer-Uneven distribution of
radiation within the x-ray field
The penetrating power of the X-ray beam is controlled by
varying the - Answer-Peak kilovoltage (kVp)
,3|Page
The rate flow of current flow across the X-ray tube is
measured in - Answer-mA
Doubling the mA will result in
1: increased patient dose
2: twice as many photons in the X-ray beam
3: increased radiographic density - Answer-1, 2, and 3
The unit used to indicate the total quantity of X-ray expose
is - Answer-Millionsampere-seconds (mAs)
The device for removing long-wavelength radiation from
the primary X-ray beam is the - Answer-Filter
X-ray equipment capable of producing 70 kVp or more is
required to have total filtration of at least: - Answer-2.5 mm
Al equiv
The purpose of rotating the anode of the X-ray tube is to -
Answer-Increase the heat capacity of the anode
, 4|Page
Image sharpness is determined by the - Answer-Size of
the effective focal spot
Above 70 kVp, what percentage of photons is created by
the bremsstrahlung process? - Answer-85%
The amount detail seen in the X-ray image is referred to
as - Answer-spatial resolution
Of what material is the filament made? - Answer-Tungsten
Of what material is the target/anode made? - Answer-
Tungsten
What is added to port to remove the long-wavelength
radiation? - Answer-aluminum filtration
What is the term used to describe the heating of a element
to a hot temperature and the expanding of the electrons in
a atom? - Answer-Thermionic emission
The cathode side of the X-ray tube is - Answer-Negative
