Principles of Radiographic Imaging Exam 1
Part 1 UPDATED ACTUAL Exam Questions
and CORRECT Answers
MATTER AND ENERGY - CORRECT ANSWER - Mass is the quantity of matter
described by its energy equivalence
Weight is the force exerted on a body under the influence of gravity
Energy is measured in joules (J)
Electron volt (eV) is used in radiology
Types of Energy
(PKCETNE) - CORRECT ANSWER - *Potential energy* is the ability to do work by
virtue of position
Energy in a stored state (battery sitting on shelf)
*Kinetic energy* is the energy of motion
Anything moving has kinetic energy and has the ability to do work because of their motion (the
battery can be transform potential energy to kinetic energy by turning a motor)
*Chemical energy* is the energy released by a chemical reaction (burning of wood)
*Electrical energy* the work done when electron moves through a potential difference (voltage)
*Thermal energy (heat)* is the energy of motion at the molecular level (burning of wood)
*Nuclear energy* is the energy contained with the nucleus of an atom (splitting of atoms to
release energy)
*Electromagnetic (EM) energy* is the electric and magnetic disturbance in space
, This type of energy is important in x-ray imaging
This involves radio waves, microwaves, UV, infrared & visible light
Einstein's Theory - CORRECT ANSWER - According to Einstein's mass-energy
equivalence, matter and energy are interchangeable
Mass-energy
E=mc2 (E=energy, m=mass, c=velocity of EM radiation in a vacuum)
Radiation - CORRECT ANSWER - Matter that absorbs part of the energy being
transmitted is said to be exposed or irradiated
Patients exposed to x-rays have been irradiated
Ionizing radiation includes x-rays
This type of radiation is capable of removing orbital electrons from atoms (matter)
Removal of an electron is termed ionization
X-rays, gamma rays, and UV light are the only forms with enough energy to ionize
Ionizing Radiation - CORRECT ANSWER - Natural environmental radiaton
Results in an annual dose of ~3 mSv
Cosmic rays-emitted by the sun and stars
Terrestrial radiation-deposits of uranium, thorium into the earth
Radionuclides-same as above
Radon-natural radioactive decay of uranium, found in concrete, bricks, and gypsum wall-board
Man-made radiation
Results in an annual dose of 3.2 mSv
Diagnostic x-rays largest source of man-made
Part 1 UPDATED ACTUAL Exam Questions
and CORRECT Answers
MATTER AND ENERGY - CORRECT ANSWER - Mass is the quantity of matter
described by its energy equivalence
Weight is the force exerted on a body under the influence of gravity
Energy is measured in joules (J)
Electron volt (eV) is used in radiology
Types of Energy
(PKCETNE) - CORRECT ANSWER - *Potential energy* is the ability to do work by
virtue of position
Energy in a stored state (battery sitting on shelf)
*Kinetic energy* is the energy of motion
Anything moving has kinetic energy and has the ability to do work because of their motion (the
battery can be transform potential energy to kinetic energy by turning a motor)
*Chemical energy* is the energy released by a chemical reaction (burning of wood)
*Electrical energy* the work done when electron moves through a potential difference (voltage)
*Thermal energy (heat)* is the energy of motion at the molecular level (burning of wood)
*Nuclear energy* is the energy contained with the nucleus of an atom (splitting of atoms to
release energy)
*Electromagnetic (EM) energy* is the electric and magnetic disturbance in space
, This type of energy is important in x-ray imaging
This involves radio waves, microwaves, UV, infrared & visible light
Einstein's Theory - CORRECT ANSWER - According to Einstein's mass-energy
equivalence, matter and energy are interchangeable
Mass-energy
E=mc2 (E=energy, m=mass, c=velocity of EM radiation in a vacuum)
Radiation - CORRECT ANSWER - Matter that absorbs part of the energy being
transmitted is said to be exposed or irradiated
Patients exposed to x-rays have been irradiated
Ionizing radiation includes x-rays
This type of radiation is capable of removing orbital electrons from atoms (matter)
Removal of an electron is termed ionization
X-rays, gamma rays, and UV light are the only forms with enough energy to ionize
Ionizing Radiation - CORRECT ANSWER - Natural environmental radiaton
Results in an annual dose of ~3 mSv
Cosmic rays-emitted by the sun and stars
Terrestrial radiation-deposits of uranium, thorium into the earth
Radionuclides-same as above
Radon-natural radioactive decay of uranium, found in concrete, bricks, and gypsum wall-board
Man-made radiation
Results in an annual dose of 3.2 mSv
Diagnostic x-rays largest source of man-made
