ASRT - California Supervisor and Operator Exam
Questions and Verified Correct Answers latest
2025–2026
(unit 1) According to the article, the characteristic that best identifies a natural source of
radiation is the ability to:
a. Spontaneously emit excess energy
b. Emit excess energy when excited by x-rays
c. Avoid decay.
d. Glow in the dark. - answer>>>a. Spontaneously emit excess energy
(unit 1) Half-life is defined as:
a. The amount of time it takes an x-ray to reach its target.
b. The amount of time it takes to generate a wavelength equivalent to an x-ray.
c. A radioactive element's rate of decay.
d. How long it takes for an element to release half of its energy. - answer>>>c. A
radioactive element's rate of decay.
(unit 1) Of the electromagnetic radiation forms, ___ have (has) the lowest energy and ___
the highest.
a. Visible light; gamma rays
b. Radio waves; ultraviolet rays
c. Ultraviolet rays; x-rays
d. Radio waves; gamma rays - answer>>>d. Radio waves; gamma rays
(unit 1) Wavelength is defined by the:
a. Height of an energetic waveform.
,b. Distance between 2 peaks of a waveform.
c. Length of the entire waveform.
d. Distance between 2 valleys in a waveform. - answer>>>b. Distance between 2 peaks of
a waveform.
(unit 1) Of the 5 types of possible interactions between ionizing radiation and tissues,
which 3 occur at energies within the diagnostic range of 20 to 150 kV?
a. Bremsstrahlung, Compton, general scatter
b. Photoelectric, Compton, classical
c. Photoelectric, bremsstrahlung, classical
d. Classical, Compton, pair production - answer>>>b. Photoelectric, Compton, classical
(unit 1) The effective dose measurement was created to:
a. Provide a dose quantity related to the probability of damaging health due to stochastic
effects from exposure to low levels of ionizing radiation.
b. Calculate exact dose received by target organs.
c. Track radiation exposure rates in a national radiation exposure database.
d. Help radiation health physicists approve equipment by ensuring that an accurate dose
was received. - answer>>>a. Provide a dose quantity related to the probability of
damaging health due to stochastic effects from exposure to low levels of ionizing
radiation.
(unit 1) Exact tissue and organ dose absorbed can be calculated easily using indicators on
modern imaging equipment such as CT scanners and image intensifiers.
a. True
b. False - answer>>>b. False
(unit 1) What percentage of the human body is made up of water molecules?
a. 20
,b. 40
c. 60
d. 80 - answer>>>d. 80
(unit 1) A function of carbohydrates in the body is to provide:
a. Immunity
b. Red blood cell production
c. Fuel for cell metabolism
d. Glucose and fats to cells - answer>>>c. Fuel for cell metabolism
(unit 1) What 4 nitrogenous bases make up the "ladder rungs" of the DNA double helix?
a. Adenine, guanine, thymine, cytosine
b. Tryamine, guanine, thymine, cytosine
c. Adenine, guanine, cortisol, cytosine
d. Glucose, guanine, thymine, cytosine - answer>>>a. Adenine, guanine, thymine,
cytosine
(unit 1) Where is RNA located?
a. Only in the cytoplasm
b. Only in the nucleus
c. In the cell wall and the nucleus
d. In the cytoplasm and in the nucleus - answer>>>d. In the cytoplasm and in the nucleus
(unit 1) The principal inorganic compounds in protoplasm are water and:
a. Carbon
b. mineral sugars.
c. Mineral salts (electrolytes)
, d. nitrogen - answer>>>c. Mineral salts (electrolytes)
(unit 1) The majority of a cell's molecular components exist in the:
a. Nucleus
b. Cell wall
c. Cytoplasm
d. Golgi apparatus - answer>>>c. Cytoplasm
(unit 1) ___ is (are) responsible for protein synthesis.
a. Fats
b. Electrolytes
c. DNA
d. ribosomes - answer>>>d. ribosomes
(unit 1) The female germ cell is the:
a. Spermatogonium
b. Ribosome
c. Oogonium
d. Corpus albicans - answer>>>c. Oogonium
(unit 1) ___ is the process that produces 2 daughter cells identical to the parent cell.
a. Point mutation
b. Asexual reproduction
c. Mitosis
d. meiosis - answer>>>c. Mitosis
Questions and Verified Correct Answers latest
2025–2026
(unit 1) According to the article, the characteristic that best identifies a natural source of
radiation is the ability to:
a. Spontaneously emit excess energy
b. Emit excess energy when excited by x-rays
c. Avoid decay.
d. Glow in the dark. - answer>>>a. Spontaneously emit excess energy
(unit 1) Half-life is defined as:
a. The amount of time it takes an x-ray to reach its target.
b. The amount of time it takes to generate a wavelength equivalent to an x-ray.
c. A radioactive element's rate of decay.
d. How long it takes for an element to release half of its energy. - answer>>>c. A
radioactive element's rate of decay.
(unit 1) Of the electromagnetic radiation forms, ___ have (has) the lowest energy and ___
the highest.
a. Visible light; gamma rays
b. Radio waves; ultraviolet rays
c. Ultraviolet rays; x-rays
d. Radio waves; gamma rays - answer>>>d. Radio waves; gamma rays
(unit 1) Wavelength is defined by the:
a. Height of an energetic waveform.
,b. Distance between 2 peaks of a waveform.
c. Length of the entire waveform.
d. Distance between 2 valleys in a waveform. - answer>>>b. Distance between 2 peaks of
a waveform.
(unit 1) Of the 5 types of possible interactions between ionizing radiation and tissues,
which 3 occur at energies within the diagnostic range of 20 to 150 kV?
a. Bremsstrahlung, Compton, general scatter
b. Photoelectric, Compton, classical
c. Photoelectric, bremsstrahlung, classical
d. Classical, Compton, pair production - answer>>>b. Photoelectric, Compton, classical
(unit 1) The effective dose measurement was created to:
a. Provide a dose quantity related to the probability of damaging health due to stochastic
effects from exposure to low levels of ionizing radiation.
b. Calculate exact dose received by target organs.
c. Track radiation exposure rates in a national radiation exposure database.
d. Help radiation health physicists approve equipment by ensuring that an accurate dose
was received. - answer>>>a. Provide a dose quantity related to the probability of
damaging health due to stochastic effects from exposure to low levels of ionizing
radiation.
(unit 1) Exact tissue and organ dose absorbed can be calculated easily using indicators on
modern imaging equipment such as CT scanners and image intensifiers.
a. True
b. False - answer>>>b. False
(unit 1) What percentage of the human body is made up of water molecules?
a. 20
,b. 40
c. 60
d. 80 - answer>>>d. 80
(unit 1) A function of carbohydrates in the body is to provide:
a. Immunity
b. Red blood cell production
c. Fuel for cell metabolism
d. Glucose and fats to cells - answer>>>c. Fuel for cell metabolism
(unit 1) What 4 nitrogenous bases make up the "ladder rungs" of the DNA double helix?
a. Adenine, guanine, thymine, cytosine
b. Tryamine, guanine, thymine, cytosine
c. Adenine, guanine, cortisol, cytosine
d. Glucose, guanine, thymine, cytosine - answer>>>a. Adenine, guanine, thymine,
cytosine
(unit 1) Where is RNA located?
a. Only in the cytoplasm
b. Only in the nucleus
c. In the cell wall and the nucleus
d. In the cytoplasm and in the nucleus - answer>>>d. In the cytoplasm and in the nucleus
(unit 1) The principal inorganic compounds in protoplasm are water and:
a. Carbon
b. mineral sugars.
c. Mineral salts (electrolytes)
, d. nitrogen - answer>>>c. Mineral salts (electrolytes)
(unit 1) The majority of a cell's molecular components exist in the:
a. Nucleus
b. Cell wall
c. Cytoplasm
d. Golgi apparatus - answer>>>c. Cytoplasm
(unit 1) ___ is (are) responsible for protein synthesis.
a. Fats
b. Electrolytes
c. DNA
d. ribosomes - answer>>>d. ribosomes
(unit 1) The female germ cell is the:
a. Spermatogonium
b. Ribosome
c. Oogonium
d. Corpus albicans - answer>>>c. Oogonium
(unit 1) ___ is the process that produces 2 daughter cells identical to the parent cell.
a. Point mutation
b. Asexual reproduction
c. Mitosis
d. meiosis - answer>>>c. Mitosis
