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NJ Radon Measurement Technician Exam
(Practice Questions with Detailed Verified
Answers
What does it mean for a radon decay product to be "plated out"? Ans: It has
attached to a non-breathable object
If a radon decay product attaches to a solid object, such as a wall, it... Ans: ...can
no longer be inhaled.
What is a half-life? Ans: The time required for half of the atoms of a radioactive
element to decay.
Which type of radiation is responsible for the most cellular damage associated with
radon and radon decay products? Ans: Alpha
The negatively charged subatomic particle that orbits the nucleus is called a(n) Ans:
electron
Radon decay products that are not attached to airborne particles are much more
likely to... Ans: deposit radiation into lung tissue if inhaled.
The number of protons plus the number of neutrons in a specific atom is called Ans:
Mass number
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The number of protons in an atom's nucleus is the same as the atom's... Ans:
Atomic number
The commonly assumed equilibrium ratio of radon decay products is: Ans: 0.4
All atoms of the same element must have the same... Ans: Atomic number
The number of ______________ in an atom determines which element it is. Ans:
Protons
_________________ causes a neutral atom to become an ion. Ans: The gain or
loss of electrons
________________ is a unit used to measure radon concentration. Ans: Picocurie
per liter (pCi/L)
When ___________ decays, it produces Radon-222 Ans: Radium-226
For an atom to be neutrally charged... Ans: it's number of protons and electrons
must be equal.
Different atoms of the same element can have differing numbers of neutrons. What
are these different kinds of the same element called? Ans: isotopes
What is the half-life of radon-222? Ans: 3.8 days
Stack effect is caused by... Ans: Temperature differentials
3 factors that effect radon's ability to move through the soil: Ans: 1. Size of mineral
grain in the soil
2. Dryness of the soil
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3. Permeability of the soil
(T/F) There is a strong correlation between low ventilation rates and high radon
levels. Ans: False: there is not a strong correlation
(T/F) Radon entry, and therefore indoor radon concentrations, do not vary over
relatively short periods of time. Ans: FALSE: they do vary over relatively short
periods of time.
All of the following are driving forces that can bring radon into a home except:
- Diffusion
- Evaporation
- Emanation
- Well water Ans: Evaporation
The area below the neutral pressure plane in a home... Ans: Draws air into the
home
The 3 major factors of radon entry into a home are: Ans: - Radon source strength
- Transport of radon
- ventilation rate
Radon plays what role in the average American's annual radiation exposure? Ans: It
is the 2nd greatest contributor.
NJ Radon Measurement Technician Exam
(Practice Questions with Detailed Verified
Answers
What does it mean for a radon decay product to be "plated out"? Ans: It has
attached to a non-breathable object
If a radon decay product attaches to a solid object, such as a wall, it... Ans: ...can
no longer be inhaled.
What is a half-life? Ans: The time required for half of the atoms of a radioactive
element to decay.
Which type of radiation is responsible for the most cellular damage associated with
radon and radon decay products? Ans: Alpha
The negatively charged subatomic particle that orbits the nucleus is called a(n) Ans:
electron
Radon decay products that are not attached to airborne particles are much more
likely to... Ans: deposit radiation into lung tissue if inhaled.
The number of protons plus the number of neutrons in a specific atom is called Ans:
Mass number
, Page | 2
The number of protons in an atom's nucleus is the same as the atom's... Ans:
Atomic number
The commonly assumed equilibrium ratio of radon decay products is: Ans: 0.4
All atoms of the same element must have the same... Ans: Atomic number
The number of ______________ in an atom determines which element it is. Ans:
Protons
_________________ causes a neutral atom to become an ion. Ans: The gain or
loss of electrons
________________ is a unit used to measure radon concentration. Ans: Picocurie
per liter (pCi/L)
When ___________ decays, it produces Radon-222 Ans: Radium-226
For an atom to be neutrally charged... Ans: it's number of protons and electrons
must be equal.
Different atoms of the same element can have differing numbers of neutrons. What
are these different kinds of the same element called? Ans: isotopes
What is the half-life of radon-222? Ans: 3.8 days
Stack effect is caused by... Ans: Temperature differentials
3 factors that effect radon's ability to move through the soil: Ans: 1. Size of mineral
grain in the soil
2. Dryness of the soil
, Page | 3
3. Permeability of the soil
(T/F) There is a strong correlation between low ventilation rates and high radon
levels. Ans: False: there is not a strong correlation
(T/F) Radon entry, and therefore indoor radon concentrations, do not vary over
relatively short periods of time. Ans: FALSE: they do vary over relatively short
periods of time.
All of the following are driving forces that can bring radon into a home except:
- Diffusion
- Evaporation
- Emanation
- Well water Ans: Evaporation
The area below the neutral pressure plane in a home... Ans: Draws air into the
home
The 3 major factors of radon entry into a home are: Ans: - Radon source strength
- Transport of radon
- ventilation rate
Radon plays what role in the average American's annual radiation exposure? Ans: It
is the 2nd greatest contributor.
