NBDHE Practice Questions Rated A+ 2024

NBDHE Practice Questions Rated A+ 2024 The x-ray was discovered by a. Heinrich Geissler b. Wilhelm Roentgen c. Johann Hittorf d. William Crookes Wilhelm Roentgen Which discovery was the precursor to the discovery of x-rays? A. Beta particles B. Alpha particles C. Cathode rays D. Radioactive materials Cathode rays Which term describes two or more atoms that are joined by a chemical bond? a. ion b. ion pair c. molecule d. proton Molecule Which is not a type of particulate radiation? A. Alpha particles B. Beta particles C. Protons D. Nucleons Nucleons Which is the location where x-rays are produced? A. Positive cathode B. Positive anode C. Negative cathode D. Negative anode Positive anode Which describes scatter radiation? A. Radiation that exits the tubehead B. Radiation that is more penetrating than primary radiation C. Radiation that has been deflected from its path by interaction with matter D. none of the above Radiation that has been deflected from its path by interaction with matter In dental imaging, the quality of the x ray beam is controlled by? a. kilovoltage b. miliamperage c. exposure time d. source-to-receptor distance Kilovoltage Increasing milliamperage results in an increase in: A. Temperature of filament B. Mean energy of beam C. Number of x-rays produced D. Both A & C Temperature of filament and number of x-rays produced The overall blackness or darkness of an image is termed a. contrast b. density c. overexposure d. polychromatic Density If the target receptor distance is doubled, the resultant beam will be a. four times as intense b. twice as intense c. half as intense d. one fourth as intense One fourth as intense The latent period in radiation biology is the time between a. initial injury and repair b. subsequent doses of radiation c. cell rest and cell mitosis d. exposure to x-radiation and clinical symptoms Which factor(s) contributes to radiation injury? A. Total dose B. Dose rate C. Cell sensitivity D. Age E. All of the above All of the above Exposure to x radiation and clinical symptoms The traditional unit for measuring x-ray exposure in air is termed a. gray b. coulombs per kilogram c. rem d. rad e. roentgen Roentgen Which is considered radioresistant? A. Immature reproductive cells B. Young bone cells C. Mature bone cells D. Epithelial cells E. None of the above Mature bone cells Which position indicating device is most effective in reducing patient exposure? A. Conical B. Rectangular C. Circular D. all are equally effective in reducing patient exposure Rectangular Which statement describes the function of a filter in a dental x-ray tube head? A. It reduces the size and shape of the beam B. It removes low energy x rays C. It removes the dose of radiation to the thyroid gland D. It decreases the mean energy of the beam It removes low energy x rays The dental radiographer can regulate the x ray beam (kVp, mA, time) through the use of the a. control panel b. extension arm c. console d. position-indicating device (PID) Control panel One advantage of a film with an emulsion coating on both sides (double-emulsion film) is that a. the film requires less radiation exposure to make an image b. the image produced is less distorted c. the film has less sensitivity to radiation d. processing solutions are absorbed more easily make an image The film requires less radiation exposure to The intensifying screen that emits green light and must be used with green sensitive film is termed a. calcium tungstate b. rare earth c. phosphor d. rare tungstate Rare earth A dental image that demonstrates many shades of gray is said to have