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RADON MEASUREMENT
PROFESSIONAL EXAM (INTERNACHI
AND AARST) QUESTIONS WITH
SOLUTIONS
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 - correct-answer - decay chain
_____ are the extremely small particles of which we, and everything around us,
are made. - correct-answer - atoms
If one atom were the size of the Houston Astrodome, its nucleus would be
roughly the size of a _____. - correct-answer - pea
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T/F: The balance of the forces in the nucleus of an atom determines whether a
nucleus is stable or unstable (radioactive). - correct-answer - true
As an unstable nucleus emits radiation as it disintegrates, the radionuclide
transforms to different nuclides, and this process is called _____. - correct-answer
- radioactive decay
_____ is the energy that is released as particles or rays during radioactive decay. -
correct-answer - radiation
_____ particles include two protons and two neutrons. - correct-answer - alpha
We're really concerned with the _____ particles, because they can be stopped by
a sheet of paper where they release their energy. - correct-answer - alpha
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Some decay products of radon emit beta particles, but its alpha-emitting decay
products pose a much _____ health risk. - correct-answer - greater
_____ photons can pass through many kinds of materials, including human tissue.
- correct-answer - gamma
_____ are the source of cell damage in the lungs. - correct-answer - RDPs (radon
decay products)
T/F: Radon gas tastes like sulphur. - correct-answer - false
T/F: If RDPs plate out on a wall, they are a hazard. - correct-answer - false
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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 =
_____. - correct-answer - 0.4
The average indoor radon level is _____ pCi/L. - correct-answer - 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. -
correct-answer - 35.2
Radon is the _____ most important cause of lung cancer after smoking in many
countries. - correct-answer - 2nd
RADON MEASUREMENT
PROFESSIONAL EXAM (INTERNACHI
AND AARST) QUESTIONS WITH
SOLUTIONS
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 - correct-answer - decay chain
_____ are the extremely small particles of which we, and everything around us,
are made. - correct-answer - atoms
If one atom were the size of the Houston Astrodome, its nucleus would be
roughly the size of a _____. - correct-answer - pea
,2|Page
T/F: The balance of the forces in the nucleus of an atom determines whether a
nucleus is stable or unstable (radioactive). - correct-answer - true
As an unstable nucleus emits radiation as it disintegrates, the radionuclide
transforms to different nuclides, and this process is called _____. - correct-answer
- radioactive decay
_____ is the energy that is released as particles or rays during radioactive decay. -
correct-answer - radiation
_____ particles include two protons and two neutrons. - correct-answer - alpha
We're really concerned with the _____ particles, because they can be stopped by
a sheet of paper where they release their energy. - correct-answer - alpha
,3|Page
Some decay products of radon emit beta particles, but its alpha-emitting decay
products pose a much _____ health risk. - correct-answer - greater
_____ photons can pass through many kinds of materials, including human tissue.
- correct-answer - gamma
_____ are the source of cell damage in the lungs. - correct-answer - RDPs (radon
decay products)
T/F: Radon gas tastes like sulphur. - correct-answer - false
T/F: If RDPs plate out on a wall, they are a hazard. - correct-answer - false
, 4|Page
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 =
_____. - correct-answer - 0.4
The average indoor radon level is _____ pCi/L. - correct-answer - 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. -
correct-answer - 35.2
Radon is the _____ most important cause of lung cancer after smoking in many
countries. - correct-answer - 2nd
