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RAD TCDHA FINAL EXAM NEWEST 2024
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RAD TCDHA FINAL EXAM NEWEST 2024
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RAD TCDHA FINAL EXAM NEWEST 2024 ACTUAL EXAM180 QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES (VERIFIED ANSWERS) |ALREADY
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
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?
a. Electrons
b. Alpha Particles
c. Protons
d. 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.
a. Both statement are true
b. Both statement are false
c. The first statement is true; the second statement is false - ANSWER: c. The first
statement is true; the second statement is false
What controls the quantity of x-rays produced? - ANSWER: Milliamperage (mA)
In regard to increasing density: - 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. - ANSWER: Inversely; square of the
distance
Aluminium filters are used to remove ________ -energy, _________ wavelength x-
rays. - 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? - ANSWER: Free radical
formation created by the ionization of water may occur.
What is associated with long-term radiation effects? - 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 - ANSWER: b. Salivary Glands
TRUE OR FALSE:
Risk estimates suggest (1) that death is more likely to occur from common activities
than from dental imaging procedures and (2) that caner is much more likely to be
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