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RADIATION PROTECTION Exam Questions
With Correct Answers 100% Verified.
Units of Radiation Measurement (Traditional Units) - Answer✔1) Roentgen
2) RAD
3) REM
4) Curie
Units of Radiation Measurement (International System) SI - Answer✔1) Coulomb/Kilogram
2) Gray
3) Sievert
4) Becquerel
Roentgen - Answer✔The Measurement of the ionization of air by X-ray or gamma rays
RAD - Answer✔Radiation Absorbed Dose
REM - Answer✔Radiation Equivalent Man. Measurement of absorbed radiation that deals with
biologic damage
MPD - Answer✔Maximum Permissible Dose. which was replaced and is now called "Effective
Dose Equivalent" EDE
Coulomb/Kilogram - Answer✔SI Unit of in-air exposure
* Traditional Unit name would be Roentgen
Gray - Answer✔SI Unit of Absorbed Dose
* Traditional Unit name would be RAD
Sievert - Answer✔SI Unit of equivalent dose and affective dose
* Traditional Unit name would be REM
1
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 11:09PM. A+
Primary Beam - Answer✔Radiation that passes through the collimator. also known as the useful
beam.
Ionization - Answer✔the imparting of the charge to an atom by removal or addition of an
electron.
Two types of interactions - Answer✔Direct Hit and Indirect Hit
Direct Hit Theory - Answer✔the theory of radiation hitting the DNA molecule itself.
Indirect Hit Theory - Answer✔the theory of the radiation hitting the cytoplasm of the cell and
dispersing its energy to the DNA molecule.
Attenuation - Answer✔photons from the primary beam that have changed direction after
striking an object
A.L.A.R.A - Answer✔As Low As Reasonably Achievable
Stochastic Effect - Answer✔1) Random
2) Any Amount of Radiation could cause and effect
3) No threshold for damage
Example of Stochastic effect - Answer✔1) Cancer
2) Genetic defects
Non-Stochastic Effect - Answer✔1) Not Random
2) Needs a specific amount of radiation to cause a problem
3) Does have a threshold
Example of Non-Stochastic effect and there threshold - Answer✔*) Temporary Sterility -
200rems
*) Permanent Sterility - 500rems
*) Erythemia (red skin) - 200rems
*) Epilation (hair falls out) - 1000rems
Threshold - Answer✔Level or point of exposure at which a reaction occurs
Non-Threshold - Answer✔Any amount of radiation has an effect
Radio sensitivity - Answer✔Is the susceptibility of cells, tissues, organ systems, organisms, or
any living substance to the injurious action of radiation
2
RADIATION PROTECTION Exam Questions
With Correct Answers 100% Verified.
Units of Radiation Measurement (Traditional Units) - Answer✔1) Roentgen
2) RAD
3) REM
4) Curie
Units of Radiation Measurement (International System) SI - Answer✔1) Coulomb/Kilogram
2) Gray
3) Sievert
4) Becquerel
Roentgen - Answer✔The Measurement of the ionization of air by X-ray or gamma rays
RAD - Answer✔Radiation Absorbed Dose
REM - Answer✔Radiation Equivalent Man. Measurement of absorbed radiation that deals with
biologic damage
MPD - Answer✔Maximum Permissible Dose. which was replaced and is now called "Effective
Dose Equivalent" EDE
Coulomb/Kilogram - Answer✔SI Unit of in-air exposure
* Traditional Unit name would be Roentgen
Gray - Answer✔SI Unit of Absorbed Dose
* Traditional Unit name would be RAD
Sievert - Answer✔SI Unit of equivalent dose and affective dose
* Traditional Unit name would be REM
1
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 11:09PM. A+
Primary Beam - Answer✔Radiation that passes through the collimator. also known as the useful
beam.
Ionization - Answer✔the imparting of the charge to an atom by removal or addition of an
electron.
Two types of interactions - Answer✔Direct Hit and Indirect Hit
Direct Hit Theory - Answer✔the theory of radiation hitting the DNA molecule itself.
Indirect Hit Theory - Answer✔the theory of the radiation hitting the cytoplasm of the cell and
dispersing its energy to the DNA molecule.
Attenuation - Answer✔photons from the primary beam that have changed direction after
striking an object
A.L.A.R.A - Answer✔As Low As Reasonably Achievable
Stochastic Effect - Answer✔1) Random
2) Any Amount of Radiation could cause and effect
3) No threshold for damage
Example of Stochastic effect - Answer✔1) Cancer
2) Genetic defects
Non-Stochastic Effect - Answer✔1) Not Random
2) Needs a specific amount of radiation to cause a problem
3) Does have a threshold
Example of Non-Stochastic effect and there threshold - Answer✔*) Temporary Sterility -
200rems
*) Permanent Sterility - 500rems
*) Erythemia (red skin) - 200rems
*) Epilation (hair falls out) - 1000rems
Threshold - Answer✔Level or point of exposure at which a reaction occurs
Non-Threshold - Answer✔Any amount of radiation has an effect
Radio sensitivity - Answer✔Is the susceptibility of cells, tissues, organ systems, organisms, or
any living substance to the injurious action of radiation
2
