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ASRT - California Supervisor and Operator Exam
Study Questions and Correct Answers/ Latest Update /
Already Graded
(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.
Ans: 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.
Ans: 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
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Ans: 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.
Ans: 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
Ans: 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.
© 2025/ 2026 | ® All rights reserved
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Ans: 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
Ans: b. False
(unit 1) What percentage of the human body is made up of water molecules?
a. 20
b. 40
c. 60
d. 80
Ans: 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
Ans: c. Fuel for cell metabolism
© 2025/ 2026 | ® All rights reserved
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(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
Ans: 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
Ans: 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
Ans: c. Mineral salts (electrolytes)
(unit 1) The majority of a cell's molecular components exist in the:
a. Nucleus
© 2025/ 2026 | ® All rights reserved
ASRT - California Supervisor and Operator Exam
Study Questions and Correct Answers/ Latest Update /
Already Graded
(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.
Ans: 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.
Ans: 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
© 2025/ 2026 | ® All rights reserved
, 2 | Page
Ans: 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.
Ans: 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
Ans: 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.
© 2025/ 2026 | ® All rights reserved
, 3 | Page
Ans: 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
Ans: b. False
(unit 1) What percentage of the human body is made up of water molecules?
a. 20
b. 40
c. 60
d. 80
Ans: 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
Ans: c. Fuel for cell metabolism
© 2025/ 2026 | ® All rights reserved
, 4 | Page
(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
Ans: 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
Ans: 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
Ans: c. Mineral salts (electrolytes)
(unit 1) The majority of a cell's molecular components exist in the:
a. Nucleus
© 2025/ 2026 | ® All rights reserved
