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DENTAL RADIOLOGY FINAL EXAM ACTUAL / WITH TWO DIFFERENT VERSIONS NEWEST WITH WELL SORTED QUESTIONS AND ANSWERS /GRADED A+/BEST FOR THAT GOOD GRADE $12.99
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DENTAL RADIOLOGY FINAL EXAM ACTUAL / WITH TWO DIFFERENT VERSIONS NEWEST WITH WELL SORTED QUESTIONS AND ANSWERS /GRADED A+/BEST FOR THAT GOOD GRADE VERSION 1 Which of the following electrons has the greatest binding energy? - ANSWERS -K shell electrons the K shell electron is located closest to the nucleus and has the highest energy level and the greatest binding energy. The M, N, and L shell electrons are located farther from the nucleus. What type of electrical charge does the electron carry? - ANSWERS -negative charge Which term describes two or more atoms that are joined by chemical bonds? - ANSWERS -molecule Which of the following describes ionization? - ANSWERS -Ionization is described as the production of ions when an atom loses an electron Which term describes the process by which unstable atoms undergo a spontaneous disintegration in an effort to attain a more balance nuclear state? - ANSWERS -radioactivity Which of the following is NOT a type of particulate radiation? - ANSWERS -
nucleons Which of the following is NOT a type of electromagnetic radiation? - ANSWERS -
electrons Which of the following is a CORR ECT statement? - ANSWERS -x-rays have more energy than visible light Which of the following regulates the flow of electrical current to the filament of - ANSWERS -low-voltage circuit Which of the following is used to increase the voltage in the high -voltag e circuit? - ANSWERS -step -up transformer The transformers either increase or decrease the voltage in an electrical circuit; the step -up transformer increases the incoming voltage to the level required. Which of the following is the location in which x -rays are produced? - ANSWERS -. positive anode X-rays are produced at the anode that is the positive electrode inside the x -ray tube. Which of the following is the location in which thermionic emission occurs? - ANSWERS -negative cathode Thermionic emission oc curs at the cathode that is the negative electrode inside the x -ray tube. Which of the following accounts for 70% of all the x -ray energy produced at the anode? - ANSWERS -general radiation Which of the following occurs only at 70 kVp or higher and accoun ts for a very small part of the x -rays produced in the dental x -ray machine? - ANSWERS -
characteristic radiation Which of the following describes primary radiation? - ANSWERS -radiation that exits the tubehead Which of the following describes scatter radiation? - ANSWERS -radiation that has been deflected from its path by interaction with matter. Radiation that has been deflected from its path by the interaction with matter is scatter radiation. Which of the fol lowing type of scatter occurs most often with dental x -rays? - ANSWERS -compton In dental radiography, the quality of the x -ray beam is controlled by: - ANSWERS -
kVp Identify the kilovoltage range for most dental x -ray machines: - ANSWERS -65-100 kV The ave rage range for most dental x -ray machines is 65 -100kV. Lower settings may not penetrate the tissue adequately and cause high contrast images; higher settings increase the radiation the patient receives and cause low contrast images. A higher kilovoltage p roduces x -rays with: - ANSWERS -greater energy levels shorter wavelengths more penetrating ability An increase in kilovoltage increases the quality of the beam. It will demonstrate greater energy and shorter, more penetrating wavelengths. Identify the uni t of measurement used to describe the amount of electric current flowing through the x -ray tube: - ANSWERS -ampere Radiation produced with high kilovoltage results in: - ANSWERS -short wavelengths An increase in kilovoltage increases the quality of the beam . It will demonstrate greater energy and shorter, more penetrating wavelengths. In dental radiography, the quantity of radiation produced is controlled by: - ANSWERS -mA, exposure time Kilovoltage peak affects the quality of the x -ray beam. The quantity of the x -rays produced is controlled by milliamperage and exposure time. Increasing milliamperage results in an increase in: - ANSWERS -temperature of the filament,number of x -rays produced Milliamperage has no effect on the quality of the beam. Milliamperag e does regulate the temperature of the cathode filament, and it does affect the quantity of x-rays produced. Identify the milliamperage range for dental radiography: - ANSWERS -7-15 mA The recommended mA setting for dental radiography is 7 -15. A setting above 15 mA may cause excessive heat in the x -ray tube. The overall blackness or darkness of a film is termed: - ANSWERS -density Density is described as the overall darkness or blackness of a film. If kilovoltage is decreased with no other variations in exposure factors, the resultant film will: - ANSWERS -appear lighter A photographic image produced on film by the passage of x -rays through teeth and related structures - ANSWERS -radiograph, dental A beam of energy that has the power to penetrate substances and record image shadows on photographic film. - ANSWERS -x ray A form of energy carried by waves or a stream of particles - ANSWERS -radiation
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