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OHIO GXMO STUDY GUIDE
REVIEW EXAM 2026/2027 ACTUAL
QUESTIONS WITH VERIFIED
ANSWERS.
Who discovered x-rays? - ANSWER-Wilhelm Conrad Roentgen
When were x-rays discovered? - ANSWER-November 8, 1895
in Germany
What are the 3 Cardinal Principals of radiation protection? -
ANSWER-Maximize distance, maximize shielding, minimize
time
What is Erythema? - ANSWER-Reddening of the skin
What is Anemia? - ANSWER-Decrease of oxygen in blood, low
blood count
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What is Leukopenia? - ANSWER-Low WBC count
What is epilation? - ANSWER-Loss of hair
What does ALARA stand for? - ANSWER-As Low As
Reasonably Achievable
What is collimation? - ANSWER-Limits the size/area of the x-
ray beam
What is a proton? - ANSWER-Positively charged, in nucleus of
atom
What is a neutron? - ANSWER-No electrical charge, in nucleus
of atom
What is a electron? - ANSWER-Negatively charged, in orbital
shell around nucleus of an atom
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What is an ion? - ANSWER-A charged particle
What is ionization? - ANSWER-Process of an electron leaving
its orbit around a neutral atom
What is an ion pair? - ANSWER-An electron and a positive
charged atom
What does isotropic mean? - ANSWER-Equal in all directions
What is energy? - ANSWER-The ability to do work
What is mass? - ANSWER-The quantity of matter
What is matter? - ANSWER-Anything that occupies space and
has mass
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What travels at 186,000 miles/second? - ANSWER-All
electromagnetic radiation
Does electromagnetic radiation have mass? - ANSWER-No
What has higher energy than visible light? - ANSWER-X-rays
What happens when x-rays are absorbed by body tissue? -
ANSWER-Causes ionization of atoms and molecules
Ionization can result in what type of damage? - ANSWER-
Biological Damage
What is radioplaque? - ANSWER-DOES NOT go through
What is radiolucent? - ANSWER-Sees through
OHIO GXMO STUDY GUIDE
REVIEW EXAM 2026/2027 ACTUAL
QUESTIONS WITH VERIFIED
ANSWERS.
Who discovered x-rays? - ANSWER-Wilhelm Conrad Roentgen
When were x-rays discovered? - ANSWER-November 8, 1895
in Germany
What are the 3 Cardinal Principals of radiation protection? -
ANSWER-Maximize distance, maximize shielding, minimize
time
What is Erythema? - ANSWER-Reddening of the skin
What is Anemia? - ANSWER-Decrease of oxygen in blood, low
blood count
,2 | Page
What is Leukopenia? - ANSWER-Low WBC count
What is epilation? - ANSWER-Loss of hair
What does ALARA stand for? - ANSWER-As Low As
Reasonably Achievable
What is collimation? - ANSWER-Limits the size/area of the x-
ray beam
What is a proton? - ANSWER-Positively charged, in nucleus of
atom
What is a neutron? - ANSWER-No electrical charge, in nucleus
of atom
What is a electron? - ANSWER-Negatively charged, in orbital
shell around nucleus of an atom
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What is an ion? - ANSWER-A charged particle
What is ionization? - ANSWER-Process of an electron leaving
its orbit around a neutral atom
What is an ion pair? - ANSWER-An electron and a positive
charged atom
What does isotropic mean? - ANSWER-Equal in all directions
What is energy? - ANSWER-The ability to do work
What is mass? - ANSWER-The quantity of matter
What is matter? - ANSWER-Anything that occupies space and
has mass
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What travels at 186,000 miles/second? - ANSWER-All
electromagnetic radiation
Does electromagnetic radiation have mass? - ANSWER-No
What has higher energy than visible light? - ANSWER-X-rays
What happens when x-rays are absorbed by body tissue? -
ANSWER-Causes ionization of atoms and molecules
Ionization can result in what type of damage? - ANSWER-
Biological Damage
What is radioplaque? - ANSWER-DOES NOT go through
What is radiolucent? - ANSWER-Sees through
