LMRT ARRT EXAM 2026 QUESTIONS AND ANSWERS | A+ GRADED | WITH EXPERT
SOLUTIONS
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
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
, LMRT ARRT EXAM 2026 QUESTIONS AND ANSWERS | A+ GRADED | WITH EXPERT
SOLUTIONS
The penetrating power of the X-ray beam is controlled by varying the - (ANSWER)Peak kilovoltage (kVp)
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
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
SOLUTIONS
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
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
, LMRT ARRT EXAM 2026 QUESTIONS AND ANSWERS | A+ GRADED | WITH EXPERT
SOLUTIONS
The penetrating power of the X-ray beam is controlled by varying the - (ANSWER)Peak kilovoltage (kVp)
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
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
