RAD MIDTERM 1 TCDHA ACTUAL EXAM

RAD MIDTERM 1 TCDHA ACTUAL EXAM

CORRECTLY ANSWERED QUESTIONS GRADED

A+ A form of energy carried by waves or streams of particles is defined as... - ANSWER✔✔Radiation The x-ray was discovered by... - ANSWER✔✔Wilhelm Roentgen Who MODIFIED the paralleling technique with the introduction of the long-cone technique? - 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 - ANSWER✔✔b. Image Receptor

Which subatomic particle carries a negative electrical charge?

a) A Neutron

b) A Proton

c) An Electron

d) A Nucleon - ANSWER✔✔c. An Electron 1 / 2

What is the binding energy or binding force of an electron is... - 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... - ANSWER✔✔Radioactivity Cathode rays are derived from which of the following types of particulate radiation?

• Electrons
• Alpha Particles
• Protons
• alpha particle decay - ANSWER✔✔a. Electrons

What type of radiation includes x-rays and visible light? - ANSWER✔✔Electromagnetic Approximately what percentage of the kinetic energy of the electrons is converted to x- rays at the anode? - ANSWER✔✔Less than 1% What restricts the size of the x-ray beam? - ANSWER✔✔The Lead Collimator Which form of the x-ray beam is more detrimental to the patient and operator? - ANSWER✔✔Scatter Radiation What happens with the electrons when the kilovoltage is increased? - ANSWER✔✔ The electrons moves from the CATHODE to the ANODE with more speed Higher-energy x-ray beam with increased penetrating ability results by... - 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.

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