Dentistry > Exam > National Board Dental Hygiene Examination (NBDHE) NBDHE Practice Questions (300+ Questions with 100% (All)

National Board Dental Hygiene Examination (NBDHE) NBDHE Practice Questions (300+ Questions with 100% Correct Answers) 76 pages

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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 - ✔✔NucleonsWhich 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. contrastb. 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 [Show More]

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