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LMRT ARRT EXAM 2026 QUESTIONS
AND ANSWERS | A+ GRADED | WITH
EXPERT SOLUTIONS
Roentgen discovered x-rays while working with a _____ tube? -
correct answer-Crookes
An "electron cloud" surrounding the filament of the cathode is
referred to as a - correct answer-Space charge
Free electrons of X-ray production come from the - correct
answer-Filament
The creation of the space charge in the X-ray tube produces: -
correct answer-thermionic emission
The majority of photons in the X-ray beam are created by which
process? - correct answer-Bremsstrahlung interactions
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More than 99% of the energy of the electron stream is converted
into: - correct answer-heat
the high-speed rotation (10,000 rpm) of the anode enables -
correct answer-Greater dissipation of heat from high technical
factors
The degree of angulation of the x-ray tube target will determine
the: - correct 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 - correct answer-1 and 2
The anode heel effect is a phenomenon of X-ray production that
results in: - correct answer-Uneven distribution of radiation within
the x-ray field
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The penetrating power of the X-ray beam is controlled by varying
the - correct answer-Peak kilovoltage (kVp)
The rate flow of current flow across the X-ray tube is measured in
- correct 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 - correct answer-1, 2, and 3
The unit used to indicate the total quantity of X-ray expose is -
correct answer-Millionsampere-seconds (mAs)
The device for removing long-wavelength radiation from the
primary X-ray beam is the - correct answer-Filter
LMRT ARRT EXAM 2026 QUESTIONS
AND ANSWERS | A+ GRADED | WITH
EXPERT SOLUTIONS
Roentgen discovered x-rays while working with a _____ tube? -
correct answer-Crookes
An "electron cloud" surrounding the filament of the cathode is
referred to as a - correct answer-Space charge
Free electrons of X-ray production come from the - correct
answer-Filament
The creation of the space charge in the X-ray tube produces: -
correct answer-thermionic emission
The majority of photons in the X-ray beam are created by which
process? - correct answer-Bremsstrahlung interactions
, Page | 2
More than 99% of the energy of the electron stream is converted
into: - correct answer-heat
the high-speed rotation (10,000 rpm) of the anode enables -
correct answer-Greater dissipation of heat from high technical
factors
The degree of angulation of the x-ray tube target will determine
the: - correct 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 - correct answer-1 and 2
The anode heel effect is a phenomenon of X-ray production that
results in: - correct answer-Uneven distribution of radiation within
the x-ray field
, Page | 3
The penetrating power of the X-ray beam is controlled by varying
the - correct answer-Peak kilovoltage (kVp)
The rate flow of current flow across the X-ray tube is measured in
- correct 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 - correct answer-1, 2, and 3
The unit used to indicate the total quantity of X-ray expose is -
correct answer-Millionsampere-seconds (mAs)
The device for removing long-wavelength radiation from the
primary X-ray beam is the - correct answer-Filter
