LMRT ARRT EXAM 2025 QUESTIONS
AND ANSWERS
Roentgen discovered x-rays while working with a _____ tube? - ANS Crookes
An "electron cloud" surrounding the filament of the cathode is referred to as a - ANS Space
charge
Free electrons of X-ray production come from the - ANS Filament
The creation of the space charge in the X-ray tube produces: - ANS thermionic emission
The majority of photons in the X-ray beam are created by which process? -
ANS Bremsstrahlung interactions
More than 99% of the energy of the electron stream is converted into: - ANS heat
the high-speed rotation (10,000 rpm) of the anode enables - ANS Greater dissipation of heat
from high technical factors
The degree of angulation of the x-ray tube target will determine the: - ANS size of the actual
and effective focal spot
A dual-focus X-ray tube has:
1: Two filaments
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, 2: Two focal spot sizes
3: Two anodes - ANS 1 and 2
The anode heel effect is a phenomenon of X-ray production that results in: - ANS Uneven
distribution of radiation within the x-ray field
The penetrating power of the X-ray beam is controlled by varying the - ANS Peak kilovoltage
(kVp)
The rate flow of current flow across the X-ray tube is measured in - ANS 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 - ANS 1, 2, and 3
The unit used to indicate the total quantity of X-ray expose is - ANS Millionsampere-seconds
(mAs)
The device for removing long-wavelength radiation from the primary X-ray beam is the -
ANS Filter
X-ray equipment capable of producing 70 kVp or more is required to have total filtration of at
least: - ANS 2.5 mm Al equiv
The purpose of rotating the anode of the X-ray tube is to - ANS Increase the heat capacity of
the anode
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AND ANSWERS
Roentgen discovered x-rays while working with a _____ tube? - ANS Crookes
An "electron cloud" surrounding the filament of the cathode is referred to as a - ANS Space
charge
Free electrons of X-ray production come from the - ANS Filament
The creation of the space charge in the X-ray tube produces: - ANS thermionic emission
The majority of photons in the X-ray beam are created by which process? -
ANS Bremsstrahlung interactions
More than 99% of the energy of the electron stream is converted into: - ANS heat
the high-speed rotation (10,000 rpm) of the anode enables - ANS Greater dissipation of heat
from high technical factors
The degree of angulation of the x-ray tube target will determine the: - ANS size of the actual
and effective focal spot
A dual-focus X-ray tube has:
1: Two filaments
1 Copyright ©2025 SIRJOEL ALL RIGHTS RESERVED
, 2: Two focal spot sizes
3: Two anodes - ANS 1 and 2
The anode heel effect is a phenomenon of X-ray production that results in: - ANS Uneven
distribution of radiation within the x-ray field
The penetrating power of the X-ray beam is controlled by varying the - ANS Peak kilovoltage
(kVp)
The rate flow of current flow across the X-ray tube is measured in - ANS 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 - ANS 1, 2, and 3
The unit used to indicate the total quantity of X-ray expose is - ANS Millionsampere-seconds
(mAs)
The device for removing long-wavelength radiation from the primary X-ray beam is the -
ANS Filter
X-ray equipment capable of producing 70 kVp or more is required to have total filtration of at
least: - ANS 2.5 mm Al equiv
The purpose of rotating the anode of the X-ray tube is to - ANS Increase the heat capacity of
the anode
2 Copyright ©2025 SIRJOEL ALL RIGHTS RESERVED
