Page | 1
RAD MIDTERM 1 TCDHA QUESTIONS
WITH CORRECT ANSWERS LATEST
UPDATE 2026
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
, Page | 2
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
, Page | 3
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
RAD MIDTERM 1 TCDHA QUESTIONS
WITH CORRECT ANSWERS LATEST
UPDATE 2026
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
, Page | 2
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
, Page | 3
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
