REHS Exam Radiation Protection || A+ Graded already.
The discover of "X-Rays" was:
a. Crookes
b. Curie
c. Roentgen
d. Becquerel correct answers c. Roentgen
The shorter the wave length...
a. the higher the frequency and lower the energy
b. the lower the frequency and energy
c. the lower the frequency and higher the energy
d. the higher the frequency and energy correct answers d. the higher the frequency and energy
The roentgen is a measure of ionization in air produced by exposure to
a. x-rays or gamma rays
b. alpha particles
c. beta particles
d. all of the above correct answers a. x-rays or gamma rays
The absorption of how many ergs (energy-per-gram) of air represents one roentgen?
a. about 150
b. about 100
c. about 86
d. about 50 correct answers c. about 86
The term "rad" means:
a. required administered dose
b. radiation admitted dose
c. roentgen absorbed dose
d. radiation absorbed dose correct answers d. radiation absorbed dose
The term "rem" is short for:
a. roentgen energy measure
b. roentgen equivalent measure
c. radiation energy measure
d. Roentgen Equivalent Man correct answers d. Roentgen Equivalent Man
Which term is used to show the exposure of large populations to low level radiation?
a. person-rem
b. gamma-rem
c. radiation-rem
d. quantum-rem correct answers a. person-rem
,The rate at which atoms of a radioactive sources (radionuclides) disintegrate are measured in?
a. rems
b. rods
c. curries
d. roentgens correct answers c. curries
Isotopes of the same element have:
a. the same mass number but different atomic numbers
b. the same atomic number but different mass numbers
c. different atomic and mass numbers
d. the same atomic and mass numbers correct answers b. the same atomic number but
different mass numbers
The common types of radiation are:
a. X-Rays and gamma rays
b. alpha and beta particles
c. neutrons correct answers d. all of the above
Which of the following have little penetrating power and are normally a hazard to health only
in the form of internal radiation received through ingestion, inhalation, or open wounds?
a. X-Rays
b. alpha particles
c. beta particles
d. gamma rays correct answers b. alpha particles
The only difference between gamma rays, X-Rays, and visible light is:
a. their change
b. their particle size
c. their frequency
d. none of the above correct answers c. their frequency
Neutrons can have:
a. biological effects
b. the ability to make other substances radioactive
c. both of the above
d. none of the above correct answers c. both of the above
It takes ? half lives to reduce the radioactivity of a radionuclide to about 1% of what it was
when first measured.
a. 200
b. 125
c. 75
, d. 7 correct answers d. 7
Which of the following best describes sources of radiation?
a. natural background
b. radioactive fallout from nuclear testing or use of nuclear devices
c. radiation from medical diagnosis and treatment, industrial, or other man-made sources
d. all of the above correct answers d. all of the above
What material has a high melting point and high atomic number and is used to make a target
which stops X-Rays?
a. copper
b. lead
c. aluminum
d. tungsten correct answers d. tungsten
The term "genetic radiation" refers to effects of radiation on:
a. the elderly
b. generations yet unborn
c. all living organisms
d. young adults correct answers b. generations yet unborn
Which of the following exposures should be considered in assessing radiation hazard?
a. natural background
b. medical or occupational
c. radiation ingested through air, water, & food
d. all of the above correct answers d. all of the above
When the whole body is irradiated, the most radiosensitive area(s) is (are):
a. spleen
b. lymph nodes
c. bone marrow
d. all of the above correct answers d. all of the above
The median lethal dose of radiation (at which about 50% of the persons exposed will
probably die in one month) is considered to be:
a. 150 to 250 roentgens
b. 350 to 530 roentgens
c. 550 to 750 roentgens
d. 1000 roentgens correct answers c. 550 to 750 roentgens
"MPD" is the abbreviation for:
a. maximum person dosimeters
b. maximum permissible dose
The discover of "X-Rays" was:
a. Crookes
b. Curie
c. Roentgen
d. Becquerel correct answers c. Roentgen
The shorter the wave length...
a. the higher the frequency and lower the energy
b. the lower the frequency and energy
c. the lower the frequency and higher the energy
d. the higher the frequency and energy correct answers d. the higher the frequency and energy
The roentgen is a measure of ionization in air produced by exposure to
a. x-rays or gamma rays
b. alpha particles
c. beta particles
d. all of the above correct answers a. x-rays or gamma rays
The absorption of how many ergs (energy-per-gram) of air represents one roentgen?
a. about 150
b. about 100
c. about 86
d. about 50 correct answers c. about 86
The term "rad" means:
a. required administered dose
b. radiation admitted dose
c. roentgen absorbed dose
d. radiation absorbed dose correct answers d. radiation absorbed dose
The term "rem" is short for:
a. roentgen energy measure
b. roentgen equivalent measure
c. radiation energy measure
d. Roentgen Equivalent Man correct answers d. Roentgen Equivalent Man
Which term is used to show the exposure of large populations to low level radiation?
a. person-rem
b. gamma-rem
c. radiation-rem
d. quantum-rem correct answers a. person-rem
,The rate at which atoms of a radioactive sources (radionuclides) disintegrate are measured in?
a. rems
b. rods
c. curries
d. roentgens correct answers c. curries
Isotopes of the same element have:
a. the same mass number but different atomic numbers
b. the same atomic number but different mass numbers
c. different atomic and mass numbers
d. the same atomic and mass numbers correct answers b. the same atomic number but
different mass numbers
The common types of radiation are:
a. X-Rays and gamma rays
b. alpha and beta particles
c. neutrons correct answers d. all of the above
Which of the following have little penetrating power and are normally a hazard to health only
in the form of internal radiation received through ingestion, inhalation, or open wounds?
a. X-Rays
b. alpha particles
c. beta particles
d. gamma rays correct answers b. alpha particles
The only difference between gamma rays, X-Rays, and visible light is:
a. their change
b. their particle size
c. their frequency
d. none of the above correct answers c. their frequency
Neutrons can have:
a. biological effects
b. the ability to make other substances radioactive
c. both of the above
d. none of the above correct answers c. both of the above
It takes ? half lives to reduce the radioactivity of a radionuclide to about 1% of what it was
when first measured.
a. 200
b. 125
c. 75
, d. 7 correct answers d. 7
Which of the following best describes sources of radiation?
a. natural background
b. radioactive fallout from nuclear testing or use of nuclear devices
c. radiation from medical diagnosis and treatment, industrial, or other man-made sources
d. all of the above correct answers d. all of the above
What material has a high melting point and high atomic number and is used to make a target
which stops X-Rays?
a. copper
b. lead
c. aluminum
d. tungsten correct answers d. tungsten
The term "genetic radiation" refers to effects of radiation on:
a. the elderly
b. generations yet unborn
c. all living organisms
d. young adults correct answers b. generations yet unborn
Which of the following exposures should be considered in assessing radiation hazard?
a. natural background
b. medical or occupational
c. radiation ingested through air, water, & food
d. all of the above correct answers d. all of the above
When the whole body is irradiated, the most radiosensitive area(s) is (are):
a. spleen
b. lymph nodes
c. bone marrow
d. all of the above correct answers d. all of the above
The median lethal dose of radiation (at which about 50% of the persons exposed will
probably die in one month) is considered to be:
a. 150 to 250 roentgens
b. 350 to 530 roentgens
c. 550 to 750 roentgens
d. 1000 roentgens correct answers c. 550 to 750 roentgens
"MPD" is the abbreviation for:
a. maximum person dosimeters
b. maximum permissible dose
