TCDHA RAD Midterm 1 Exam Questions and Answers
All Correct(Verified)
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
unrelated to dental imaging radiation exposure. - Answer-Both statements are TRUE!
All Correct(Verified)
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
unrelated to dental imaging radiation exposure. - Answer-Both statements are TRUE!
