LMRT ARRT EXAM Questions and answers With complete solution 100% PASS 2025

LMRT ARRT EXAM Questions and answers
With complete solution 100% PASS 2025

Roentgen discovered x-rays while working with a _____ tube? - Correct Answers Crookes
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II! An "electron cloud" surrounding the filament of the cathode is referred to as a - Correct Answers Space
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II! charge



II! Free electrons of X-ray production come from the - Correct Answers Filament
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II! The creation of the space charge in the X-ray tube produces: - Correct Answers thermionic emission
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II! The majority of photons in the X-ray beam are created by which process? - Correct Answers
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II! Bremsstrahlung interactions II!




II! More than 99% of the energy of the electron stream is converted into: - Correct Answers heat
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II! the high-speed rotation (10,000 rpm) of the anode enables - Correct Answers Greater dissipation of heat
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II! The degree of angulation of the x-ray tube target will determine the: - Correct Answers size of the actual
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II! and effective focal spot
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II! A dual-focus X-ray tube has:
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1: Two filaments
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2: Two focal spot sizes
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3: Two anodes - Correct Answers 1 and 2
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, II! The anode heel effect is a phenomenon of X-ray production that results in: - Correct Answers Uneven
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II! distribution of radiation within the x-ray field II! II! II! II! II! II!




II! The penetrating power of the X-ray beam is controlled by varying the - Correct Answers Peak kilovoltage
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II! (kVp)



II! The rate flow of current flow across the X-ray tube is measured in - Correct Answers mA
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II! Doubling the mA will result in II! II! II! II! II! II!




1: increased patient dose
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2: twice as many photons in the X-ray beam
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3: increased radiographic density - Correct Answers 1, 2, and 3
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II! The unit used to indicate the total quantity of X-ray expose is - Correct Answers Millionsampere-seconds
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II! (mAs)



II! The device for removing long-wavelength radiation from the primary X-ray beam is the - Correct Answers
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II! Filter



II! X-ray equipment capable of producing 70 kVp or more is required to have total filtration of at least: -
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II! Correct Answers 2.5 mm Al equiv II! II! II! II! II!




II! The purpose of rotating the anode of the X-ray tube is to - Correct Answers Increase the heat capacity of
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II! the anode
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II! Image sharpness is determined by the - Correct Answers Size of the effective focal spot
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II! Above 70 kVp, what percentage of photons is created by the bremsstrahlung process? - Correct Answers
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