Radiology Tech Physics Practice Test

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• Which of the following will not reduce the intensity of an x-ray beam?
• Which of the following would not be found in an x-ray tube?
• Which of these is the negative terminal of an x-ray tube?
• Which type of radiation is produced after a Compton interaction?
• What is the correct description of beam quality and beam quantity and how they are assessed?
• What is the purpose of a compensating filter in radiography?
• Which artifact is associated with grids and how can it be avoided?
• Which subatomic particles reside in the atomic nucleus?
• Which of the following is most likely to damage the x-ray tube?
• Total filtration in diagnostic radiography includes inherent filtration plus added filtration; what is a typical minimum value for total filtration?
• The autotransformer in the x-ray generator is used to adjust
• What factors determine shielding thickness in x-ray room design?
• Which of the following x-ray units will have the least amount of voltage ripple?
• In fluoroscopy, what is the effect of using magnification mode on dose rate?
• Which does not affect the attenuation of an x-ray beam?
• What type of bond holds atoms together by sharing their outer electrons?
• Which is an advantage of three-phase equipment over single-phase equipment?
• What is the significance of entrance skin dose (ESD) in patient risk assessment?
• When will a space charge be present in the x-ray tube?
• Which of the following parts would make us the cathode end of the x-ray tube?
• What is the purpose of exposure indicators (EI) in radiography?
• In an x-ray circuit, the rectification circuit is located between which two components?
• What is the splitting of an atomic nucleus called?
• In shielding design, what defines a primary barrier?
• X-rays are very much the same as gamma rays.
• Define Detective Quantum Efficiency (DQE) and its importance for digital radiography systems.
• What type of primary radiation is produced when the x-ray tube voltage is below 70 kVp?
• Which method helps avoid grid-related artifacts in DR imaging?
• What is the effect of increasing kVp on contrast and dose when receptor exposure is maintained, according to standard radiology principles?
• In beam quality measurement, what does the half-value layer (HVL) indicate?
• Which statement best describes the energy distribution of a diagnostic x-ray beam?
• Which statement about how kVp and mA influence beam quality, beam quantity, and patient dose is correct?
• What type of current is typically supplied to the radiology department?
• Define dose-area product (DAP) and entrance skin dose (ESD) and describe their clinical significance.
• Which statement correctly describes inherent filtration?
• Which interaction does not occur in the diagnostic x-ray range?
• Which of the following is NOT a recommended strategy to reduce patient exposure during fluoroscopy?
• Which parameter directly controls the number of x-ray photons produced in the tube?
• What is grid ratio and how does it affect receptor exposure?
• In the attenuation equation I = I0 e^(-μx), the ratio I/I0 is commonly called what?
• Which QA test specifically validates beam energy?
• Why is an x-ray tube made of Pyrex glass?
• What is the bucky factor and how does it relate to grid usage?
• Which meter does not register until an x-ray exposure is made?
• Compare direct and indirect flat-panel DR detectors in terms of their conversion process.
• Define half-value layer (HVL) and what a higher HVL indicates about beam quality.
• What element is used to focus the electron stream toward the target of the anode in an X-ray tube?
• What is the primary purpose of the x-ray tube housing with lead shielding?
• What does air kerma quantify in dosimetry?
• What term describes the radiation emitted when an inner-shell vacancy is filled by an electron dropping from a higher energy level?
• When were x-rays discovered and by whom?
• Which interaction does not occur in the diagnostic x-ray range?
• Which term refers to the number of electrons in the outer shell of an atom?
• Which interaction is primarily responsible for diagnostic X-ray scatter that contributes to patient dose?
• Define Modulation Transfer Function (MTF) and its clinical significance.
• Which tests are typical for verifying beam alignment and geometry in radiography?
• What is a byproduct of the photoelectric effect?
• What are absorbed dose, equivalent dose, and effective dose, and what are their standard units?
• Which QA test ensures consistent exposure results across repeated trials?
• Which of the following is not a location for the rectification circuit in the x-ray system?
• What device restricts the x-ray beam to the area of interest?
• Which statement best differentiates SNR and CNR?
• Which of the following increases the penetrating power of the x-ray beam?
• Which filtration is manufactured into the x-ray tube?
• How is radiation energy characterized in clinical practice, and what is the typical energy distribution for diagnostic X-ray beams?
• What is the anode heel effect and how does it influence imaging technique?
• X-rays are very much the same as which?
• Which statement best describes kilovoltage's effect on the x-ray beam's energy?
• Which statement best describes the energy distribution of diagnostic X-ray beams?
• Which of the following is NOT a property of x-rays?
• Which of the following has the greatest effect on radiographic contrast?
• Which statement is NOT an advantage of photo-timers?
• Which statement about space charge and rotor engagement is true?
• Describe the impact of source-to-image distance (SID) and object-to-image distance (OID) on magnification and sharpness.
• In fluoroscopy, how do magnification mode and pulse rate influence dose rate?
• The energy of individual x-ray photons is primarily determined by the
• What is a compensating filter and in what situations is it typically used?
• What describes the function and limitations of automatic exposure control (AEC)?
• Which item would not be found inside the x-ray tube?
• If the source-detector distance increases from 80 cm to 160 cm, how does exposure change according to the inverse square law?
• Which term describes atoms whose outer electron shell is completely filled?
• Bremsstrahlung radiation occurs due to which process?
• Which three QA tests are routinely performed on radiography equipment?
• Which interaction is most enhanced by higher atomic number materials at diagnostic energies?
• What percentage of electron energy striking the x-ray tube target is converted to x-rays?
• Which of the following types of current supplies the x-ray tube?
• In a neutral atom, which statement is true?
• What is the general approach to shielding in pregnancy scenarios during radiology?
• In Beer's law for x-ray attenuation, what does the linear attenuation coefficient μ represent?
• X-rays are electromagnetic radiation.
• What term describes the plateau where increasing voltage does not yield more current?
• Which of the following can be used to determine a safe exposure?
• Provide the mathematical expression for x-ray attenuation through a material.
• Which statement best describes an x-ray photon?
• Which of the following is equal on all electromagnetic radiations?
• Which of the following is not needed to produce x-rays?
• Which is smallest?
• Which electromagnetic wave has the shortest wavelength among the following?
• Why is an x-ray tube immersed in oil?
• Where is the rectification circuit located relative to the step-down transformer and the tube?
• Which term describes the actual physical size of the focal spot on the anode?
• What is the primary mechanism of x-ray production in a diagnostic X-ray tube?
• Which interaction is responsible for the ejection of an inner-shell electron?
• Which of the following types of radiation cannot be produced at tube potentials less than 70 kVp?
• What is an exposure index in digital radiography and what are its limitations?
• How does collimation influence image quality and patient dose?
• When electrons strike the target of an x-ray tube most of their energy is converted to what?
• What does DQE stand for and why is it important in digital radiography?
• Which bond is formed by sharing electrons among atoms?
• Define quantum mottle and how it can be mitigated.
• What type of radiation is produced when a high-speed electron is slowed down or stopped?
• Why is the x-ray tube enclosed in lead-impregnated glass and lead housing?
• Which best describes the wavelength of a diagnostic x-ray beam?
• What effect does increasing kilovoltage have on the penetrating power of the x-ray beam?
• What is the concept of fill factor in digital radiography detectors and its impact on image quality?
• Which of the following is NOT a typical QA/QC test in radiology physics?
• Why is HVL verification important in radiology QA?
• Which statement about shielding in pediatric radiography is true?
• Which formula correctly relates the speed, frequency, and wavelength of electromagnetic radiation?
• Added filtration influence on the x-ray spectrum and patient dose.
• Which subatomic particle listed is the largest?
• Grid alignment to prevent grid cutoff requires what orientation relative to the beam?
• Between the step-up transformer and rectification circuit current is?
• Remnant radiation refers to radiation that ...
• Beam hardening in CT imaging is best described as which of the following?
• Which condition can cause pitting of the x-ray tube target?
• In the x-ray tube, most of the input energy is converted to which form?
• Which of the following types of tubes is used in modern radiographic equipment?
• Why are anti-scatter grids used, and what is the typical trade-off?
• Which component is placed in the circuit to handle current changes during exposure?
• What is the primary purpose of aluminum filtration in the x-ray beam?
• Which statement about effective dose is true?
• Which interaction is responsible for most scattered radiation in the diagnostic X-ray range?
• What type of motor drives the rotating anode?
• What is the Moiré artifact in radiography and how can it be avoided when PSP plates are used?
• Which chart can be used to determine a safe exposure?
• What technique adjustment reduces patient dose in chest radiography while maintaining receptor exposure?
• Which statement best describes the focusing cup's role in x-ray production?
• What is the role of AEC alignment and detector selection in achieving consistent exposures?
• Which components contribute to inherent filtration?
• Which statement is true regarding x-ray production components as described in the material?
• The component that acts as the source of electrons in the x-ray tube is the
• Not essential to the operation of automatic exposure controls?
• The space charge presence is associated with which operating condition?
• Which statement best describes the purpose of QA/QC programs in radiology physics and provides examples of typical tests?
• What is the purpose of equivalent dose in radiation protection?
• What does Detective Quantum Efficiency (DQE) measure in digital radiography?
• What is the effect of pulsed fluoroscopy on patient dose?
• Which particle has no electric charge?
• Distinguish primary, scattered, and leakage radiation and their implications for shielding design.
• What type of current flows between the step up transformer and the rectification circuit?
• X-ray photons with shorter wavelengths have what energy compared to photons with longer wavelengths?
• Which represents a high energy x-ray photon?
• Which strategy most effectively minimizes motion artifacts in radiographic imaging?
• How does patient positioning influence geometric distortion in radiography?
• List the three primary interactions of diagnostic x-rays with matter and identify which dominates at diagnostic energies.
• The device that provides the high voltage to the x-ray tube is the
• The oil around an X-ray tube primarily provides which function?
• In an X-ray tube, what is the primary purpose of the molybdenum focusing cup?
• What can cause dose variability in an AEC system with multiple detectors?
• Who invented the first x-ray tube?
• The term describing a plateau where increasing kilovoltage does not increase milliamperage is called
• Compare film-screen radiography and digital radiography in terms of image formation.
• Monoenergetic beams are characterized by which property?
• Which electromagnetic wave has the highest frequency among the following?
• Which item would not be found inside the x-ray tube?
• Which subatomic particle is generally the largest among the following?
• Which factors influence technique selection for a chest radiograph in modern practice?
• Who originally described what an atom looks like?
• How does focal spot size affect geometric unsharpness and spatial resolution?
• Which of the following will produce the least load on an x-ray tube?
• Which of the following describes a proton?
• Grid cutoff is caused by misalignment or an off-center x-ray beam. How should the beam be aligned to prevent grid cutoff?
• Which would not be found in the nucleus?
• Where in the X-ray circuit is the timer located?
• X-ray photons traveling in a vacuum move at what approximate speed?
• Which describes the x-rays produced in the radiographic tube?
• In radiography, how does the photoelectric effect influence bone contrast?