TCDHA RAD 1 Exam Actual Exam 2025 | Complete
Questions and CORRECT ANSWERs | Graded A+ | Verified
Answers | Latest Version | Brand New Version!
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:
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. - CORRECT ANSWER-Both statements are TRUE!
The use of F-speed film instead of D-speed film reduces the absorbed dose by _______% -
CORRECT ANSWER-60%
What should you do prior to taking x-rays to protect your patient from radiation exposure?
a. Proper film processing
Questions and CORRECT ANSWERs | Graded A+ | Verified
Answers | Latest Version | Brand New Version!
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:
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. - CORRECT ANSWER-Both statements are TRUE!
The use of F-speed film instead of D-speed film reduces the absorbed dose by _______% -
CORRECT ANSWER-60%
What should you do prior to taking x-rays to protect your patient from radiation exposure?
a. Proper film processing
