90. The amount of radiation that is emitted from the tubehead and reaches the patient is known as the: a. Absorbed dose. b. Equivalent dose. c. Effective dose. d. Exposure. 91. The term used to compare the biologic effects of different types of ionizing radiation on living tissues and organs is the: a. Effective dose. b. Equivalent dose. c. Exposure. d. Absorbed dose. 92. The numerical value given to different tissues such as the brain, gonads, bone marrow, thyroid gland, and skin, known as the tissue-weighting factor, is defined by the: a. American Cancer Society. b. International Commission on Radiological Protection. c. National Council on Radiation Protection and Measurements. d. Occupational Safety and Health Administration. 93. For people living in the United States, 50% of radiation exposure derives from: a. Industrial products. b. Consumer products. c. Natural background radiation. d. Occupational radiation. 94. In the United States, most people receive an average annual dose of cosmic radiation of: a. 0.12 mSv. b. 0.33 mSv. c. 0.56 mSv. d. 0.71 mSv. 95. The single largest contributor to the phenomenon of natural
99. Joint recommendations for prescribing dental radiographs have been established by the American Dental Association Council on Scientific Affairs, the Public Health Service, and the: a. International Commission on Radiation Units and Measurements. b. National Council on Radiation Protection and Measurements. c. Occupational Safety and Health Administration. d. Food and Drug Administration. 100. Federal law requires that a dental x-ray machine operating below 70 kVp have a minimum aluminum filtration of: a. 1.5 mm. b. 2.0 mm. c. 2.5 mm. d. 3.0 mm. 101. Because it decreases the radiation dose nearly 60%, the preferred type of collimation is: a. Rectangular. b. Circular. c. Square. d. Triangular. 102. Which speed of film provides the lowest radiation exposure to the patient? a. C-speed. b. D-speed. c. E-speed. d. F-speed. 103. All dental radiographic equipment, regardless of date of purchase or manufacturer, is subject to x-ray equipment inspections by: a. Local authorities only. b. State authorities only. c. Federal authorities only. d. Both state and federal authorities. 104. When patients request additional information about dental treatment, including dental radiographic examinations, the dentist can refer them to the MouthHealthy website sponsored by the: a. American Dental Association. b. National Council on Radiation Protection and Measurements. c. Occupational Safety and Health Administration. d. Food and Drug Administration. 105. When a patient asks how often x-rays are needed, he or she should be told that the dentist determines the number, type, and frequency of x-rays based on: a. Guidelines provided by the Occupational Safety and Health Administration. b. The patient’s individual needs and oral condition.
radiation is: a. Radon.
b. Uranium. c. Thorium. d. Potassium. 96. The largest contributor to artificial radiation is: a. Medical diagnostic imaging. b. Industrial sources. c. Occupational exposure. d. Consumer products.
97. With no barrier present, a clinician should stand at least 6 feet away and should stand in relation to the primary beam at an angle of: a. 10° to 50°. b. 60° to 80°. c. 90° to 135°. d. 140° to 160°. 98. The best way to ensure personnel compliance with radiation safety practices and track occupational exposure is to: a. Complete a daily log of radiographic procedures. b. Track the number of films used in a given day. c. Use occupational radiation monitoring devices. d. Calculate the total kVp used for each unit.
c. The date the last set of films was taken. d. When insurance will cover the films.
106. A set of four bitewing radiographs taken with rectangular collimation and either digital radiography or F-speed film is equivalent to approximately how many days of U.S. background radiation?
a. 0.2 days. b. 0.4 days. c. 0.6 days. d. 0.8 days.
Course Code : DFL03DR
Page 84
Book Code: DHFL2624
EliteLearning.com/Dental
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