Radon Measurement Professional Exam (InterNACHI and
AARST) Actual Updated Questions and Answers Solved
100%
A _____ refers to the series of transformations that a given radionuclide will
undergo, as well as the kind of radiation it emits, which are characteristic of the
radionuclide
decay chain
_____ are the extremely small particles of which we, and everything around us,
are made.
atoms
If one atom were the size of the Houston Astrodome, its nucleus would be
roughly the size of a _____.
pea
T/F: The balance of the forces in the nucleus of an atom determines whether a
nucleus is stable or unstable (radioactive).
true
As an unstable nucleus emits radiation as it disintegrates, the radionuclide
transforms to different nuclides, and this process is called _____.
radioactive decay
_____ is the energy that is released as particles or rays during radioactive decay.
radiation
_____ particles include two protons and two neutrons.
alpha
We're really concerned with the _____ particles, because they can be stopped by
a sheet of paper where they release their energy.
alpha
Some decay products of radon emit beta particles, but its alpha-emitting decay
products pose a much _____ health risk.
greater
_____ photons can pass through many kinds of materials, including human
tissue.
gamma
_____ are the source of cell damage in the lungs.
RDPs (radon decay products)
T/F: Radon gas tastes like sulphur.
false
T/F: If RDPs plate out on a wall, they are a hazard.
false
If the radon concentration is 75 pCi/L, and the decay-product concentration is 0.3
WL, the equilibrium ratio would be calculated as follows: ER = (0.3) x (100) / 75 =
_____.
0.4
The average indoor radon level is _____ pCi/L.
1.3
, If a gallon container held air with 4 pCi/L, there would be about 4 (quarts per
gallon) multiplied by 4 (pCi/L) multiplied by 2.22 disintegrations per minutes, or
about _____ disintegrations per minutes of radon atoms in the container.
35.2
Radon is the _____ most important cause of lung cancer after smoking in many
countries.
2nd
T/F: The World Health Organization (WHO) says radon causes up to 15% of lung
cancers worldwide.
true
T/F: There exists a known threshold concentration below which radon exposure
presents no risk.
false
T/F: Since alpha particles are more massive and more highly charged than other
types of ionizing radiation, they are more damaging to living tissue.
true
T/F: Evidence exists that shows a threshold of exposure below which radon
levels are harmless.
false
T/F: Radon is a known human lung carcinogen and is the largest source of
radiation exposure and risk to the general public.
true
A difference in _____ between the basement or crawlspace and the surrounding
soil draws radon into the home.
air pressure
The objective of a sub-slab or sub-membrane depressurization system is to
create a _____ beneath the foundation, which is greater in strength than the
vacuum imposed on the soil by the house itself.
vacuum
T/F: Radon gas is approximately seven times heavier than air.
true
We estimate that about 1 in _____ homes nationwide have levels at or above the
level of 4 pCi/l, the level at which it is recommended to take action to reduce
concentrations.
15
T/F: You can see, feel, smell, and taste radon.
false
This standard of practice specifies procedures and minimum requirements when
measuring radon concentrations in _____ residences for determining if radon
mitigation is necessary to protect current and future occupants.
single-family
This standard applies to homeowners, professionals and any other party seeking
to determine if radon mitigation is necessary for _____ purposes.
real estate or non-real estate
_____ on any parcel of land can have a radon problem.
any home
AARST) Actual Updated Questions and Answers Solved
100%
A _____ refers to the series of transformations that a given radionuclide will
undergo, as well as the kind of radiation it emits, which are characteristic of the
radionuclide
decay chain
_____ are the extremely small particles of which we, and everything around us,
are made.
atoms
If one atom were the size of the Houston Astrodome, its nucleus would be
roughly the size of a _____.
pea
T/F: The balance of the forces in the nucleus of an atom determines whether a
nucleus is stable or unstable (radioactive).
true
As an unstable nucleus emits radiation as it disintegrates, the radionuclide
transforms to different nuclides, and this process is called _____.
radioactive decay
_____ is the energy that is released as particles or rays during radioactive decay.
radiation
_____ particles include two protons and two neutrons.
alpha
We're really concerned with the _____ particles, because they can be stopped by
a sheet of paper where they release their energy.
alpha
Some decay products of radon emit beta particles, but its alpha-emitting decay
products pose a much _____ health risk.
greater
_____ photons can pass through many kinds of materials, including human
tissue.
gamma
_____ are the source of cell damage in the lungs.
RDPs (radon decay products)
T/F: Radon gas tastes like sulphur.
false
T/F: If RDPs plate out on a wall, they are a hazard.
false
If the radon concentration is 75 pCi/L, and the decay-product concentration is 0.3
WL, the equilibrium ratio would be calculated as follows: ER = (0.3) x (100) / 75 =
_____.
0.4
The average indoor radon level is _____ pCi/L.
1.3
, If a gallon container held air with 4 pCi/L, there would be about 4 (quarts per
gallon) multiplied by 4 (pCi/L) multiplied by 2.22 disintegrations per minutes, or
about _____ disintegrations per minutes of radon atoms in the container.
35.2
Radon is the _____ most important cause of lung cancer after smoking in many
countries.
2nd
T/F: The World Health Organization (WHO) says radon causes up to 15% of lung
cancers worldwide.
true
T/F: There exists a known threshold concentration below which radon exposure
presents no risk.
false
T/F: Since alpha particles are more massive and more highly charged than other
types of ionizing radiation, they are more damaging to living tissue.
true
T/F: Evidence exists that shows a threshold of exposure below which radon
levels are harmless.
false
T/F: Radon is a known human lung carcinogen and is the largest source of
radiation exposure and risk to the general public.
true
A difference in _____ between the basement or crawlspace and the surrounding
soil draws radon into the home.
air pressure
The objective of a sub-slab or sub-membrane depressurization system is to
create a _____ beneath the foundation, which is greater in strength than the
vacuum imposed on the soil by the house itself.
vacuum
T/F: Radon gas is approximately seven times heavier than air.
true
We estimate that about 1 in _____ homes nationwide have levels at or above the
level of 4 pCi/l, the level at which it is recommended to take action to reduce
concentrations.
15
T/F: You can see, feel, smell, and taste radon.
false
This standard of practice specifies procedures and minimum requirements when
measuring radon concentrations in _____ residences for determining if radon
mitigation is necessary to protect current and future occupants.
single-family
This standard applies to homeowners, professionals and any other party seeking
to determine if radon mitigation is necessary for _____ purposes.
real estate or non-real estate
_____ on any parcel of land can have a radon problem.
any home
