TCDHA RAD Midterm Exam 1 With 100% Correct Answers 2023, Exams of Advanced Education

Download TCDHA RAD Midterm Exam 1 With 100% Correct Answers 2023 and more Exams Advanced Education in PDF only on Docsity! TCDHA RAD Midterm Exam 1 With 100% Correct Answers 2023 A form of energy carried by waves or streams of particles is defined as... - Correct Answer-Radiation The x-ray was discovered by... - Correct Answer-Wilhelm Roentgen Who MODIFIED the paralleling technique with the introduction of the long-cone technique? - Correct Answer-F. Gordon Fitzgerald Which of the following would you place in the patient's mouth in order to take dental x- rays? a) Image b) Image Receptor c) Radiograph d) Dental radiograph - Correct Answer-b. Image Receptor Which subatomic particle carries a negative electrical charge? a) A Neutron b) A Proton c) An Electron d) A Nucleon - Correct Answer-c. An Electron What is the binding energy or binding force of an electron is... - Correct Answer- Determined by the distance between the orbiting electrons and the nucleus A spontaneous emission of radiation from the disintegration of unstable atomic nuclei is... - Correct Answer-Radioactivity Cathode rays are derived from which of the following types of particulate radiation? a. Electrons b. Alpha Particles c. Protons d. alpha particle decay - Correct Answer-a. Electrons What type of radiation includes x-rays and visible light? - Correct Answer- Electromagnetic Approximately what percentage of the kinetic energy of the electrons is converted to x- rays at the anode? - Correct Answer-Less than 1% What restricts the size of the x-ray beam? - Correct Answer-The Lead Collimator Which form of the x-ray beam is more detrimental to the patient and operator? - Correct Answer-Scatter Radiation What happens with the electrons when the kilovoltage is increased? - Correct Answer- The electrons moves from the CATHODE to the ANODE with more speed Higher-energy x-ray beam with increased penetrating ability results by... - Correct Answer-When the kilovolt is increased (1) Density is the overall darkness or blackness of a dental image. (2) When the kilovoltage is increased while other exposure factors remain constant, the resultant image exhibits a decreased density and appears lighter. a. Both statement are true b. Both statement are false c. The first statement is true; the second statement is false - Correct Answer-c. The first statement is true; the second statement is false What controls the quantity of x-rays produced? - Correct Answer-Milliamperage (mA) In regard to increasing density: - Correct Answer-An increase in either kVp or mA will increase density. According to inverse square law, the intensity of radiation is ________ proportional to the _________ from the source of radiation. - Correct Answer-Inversely; square of the distance Aluminium filters are used to remove ________ -energy, _________ wavelength x-rays. - Correct Answer-Low; Longer What specific mechanism of radiation injury may result in the formation of hydrogen peroxide when x-ray energy is absorbed by patients? - Correct Answer-Free radical formation created by the ionization of water may occur. What is associated with long-term radiation effects? - Correct Answer-Small amounts of radiation absorbed over a long period. Which of the following is the LEAST sensitive to x-rays? a. Bone marrow b. Salivary glands c. Lymphoid tissue d. Intestine - Correct Answer-b. Salivary Glands TRUE OR FALSE: A beam of energy that has the power to penetrate substances and record image shadows on a receptor is... - Correct Answer-An x-ray Radiology - Correct Answer-A branch of medicine that deals with the use of x-rays X-radiation is a high-energy radiation produced by.... - Correct Answer-The collision of a beam of electrons with a metal target in an X-ray tube. Who observed that discharges emitted from the negative electrode of a vacuum tube traveled in straight lines, produced heat, and resulted in a greenish fluorescence. - Correct Answer-Johann Hittorf in 1870 William Crookes discovered... - Correct Answer-That cathode rays were streams of charged particles; 1870s Who INTRODUCED the paralleling technique? - Correct Answer-C. Edmund Kells (1896) Who MODIFIED the BISECTING technique and introduced the bite-wing technique? - Correct Answer-Howard Riley Raper (1925) What is an image? - Correct Answer-Is a picture or likeness of an object A radiograph is... - Correct Answer-An image of two-dimensional representation of a three-dimensional object. A DENTAL radiograph is... - Correct Answer-Is the dental image produced on a recording medium TRUE OR FALSE: The outer shells are stronger than the inner shells? - Correct Answer-FALSE! Inner shells are stronger What are fast-moving electrons emitted from the nucleus of radioactive atoms? - Correct Answer-Beta Particles What is the process of radioactivity? - Correct Answer-The process by which certain unstable atoms or elements undergo spontaneous disintegration, or decay, in effort to attain a more balanced nuclear state. _____ Particles are emitted from nuclei of heavy metals. - Correct Answer-ALPHA _______ are accelerated particles with a mass of _____ and a charge of _____ - Correct Answer-Protons; 1; +1 What are accelerated particles with a mass of 1 and no electrical charge? - Correct Answer-Neutrons Which radiation are human-made or occur naturally? - Correct Answer-Electromagnetic TRUE OF FALSE: Electromagnetic radiations are NOT a form of particulate radiation. - Correct Answer- TRUE TRUE OR FALSE: Electromagnetic radiations HAVE mass. - Correct Answer-FALSE During the production of x-rays, what carries out the heat produced? - Correct Answer- The copper stem ________ Portion of the tube permits a small number of x-rays to exit from the X-ray tube. - Correct Answer-The Unleaded glass window _________ filters the long-wavelength x-rays from the beam - Correct Answer-The aluminum disc What's another term for 'Useful beam'? - Correct Answer-Primary Radiation ________ is the penetrating x-ray beam produced at the target of the anode. - Correct Answer-Primary Radiation When is Secondary Radiation created? - Correct Answer-When the primary beam interacts with matter. Electrons move from the _______ to the ______ - Correct Answer-Cathode; anode What does the voltage control? - Correct Answer-The maximum penetrating power of electrons. What does kV peak represents? - Correct Answer-The maximum voltage available and is only found with alternating current machines. An example of ionization? - Correct Answer-Hydrogen peroxide; Free radical formation What are some symptoms of short-term radiation effect? - Correct Answer-Diarrhea, hair loss, and hemorrhage. ________ radiation effects are associated with acute radiation syndrome. - Correct Answer-Short-term Short-term radiation effects are associated with _______ amounts of radiation absorbed over a __________ - Correct Answer-Large; short time What the term for clinical effects that are seen within minutes, days, or weeks of the radiation exposure? - Correct Answer-Short-term effects What body parts are the MOST sensitive (radiosensitive) to x-rays? - Correct Answer- Bone marrow; lymphoid; intestine An example of a patient protection technique used after x-ray exposure is.... - Correct Answer-Proper film processing What does Added filtration includes? - Correct Answer-The placement of aluminum discs in the path of x-ray beam between the collimator and the tube head seal. Inherent filtration is equivalent to approximately ____ to _____ of aluminum. - Correct Answer-0.5; 1.0 mm Which PID does not produce scatter radiation? - Correct Answer-Rectangular PIDs The on-off switch turns the machine on and off and should be... - Correct Answer- Turned on before your patient was seated. What is the function of the beam alignment device? - Correct Answer-To help the dental radiographer position the PID in relation tot he tooth and receptor. Intersecting - Correct Answer-Cutting across or through Perpendicular - Correct Answer-Intersecting at or forming right angles Receptor - Correct Answer-Refers to something that responds to a stimulus What are the components of a film composition? - Correct Answer-1. A film base 2. An adhesive layer 3. Film emulsion 4. A protective layer A flexible piece of polyester plastic 0.2 mm in thickness that is constructed to withstand heat, moisture, and chemical exposure is.... - Correct Answer-A Film Base TRUE OR FALSE: The film base has is transparent with slight blue tint that is used to emphasize contrast and enhance image quality - Correct Answer-TRUE