NRPP RADON MEASUREMENTS | 160
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100% CORRECT |
NEW UPDATE 2025
If a sample of radon is taken from a room that is known to be at 125pCi/L and is
kept in a well sealed container, what will the approximate radon activity be within
the container after eight days? - ANSWERS 31.3
Radon decay products have longer or shorter half lives than radon gas? -
ANSWERS Shorter
The ionization of an otherwise electrically neutral atom is used in measuring
radiation. Which process best describes ionization? - ANSWERS An uncharged
atom gains or loses orbital electrons and becomes electrically charged.
Give three characteristics of radon - ANSWERS Half life of 3.8 days
Inert
Can't sense (see, smell, or taste)
Radioactive
Naturally occurring
Gas
If a room within a home is determined to be at 25 pCi/L, what working level would
be expected in this room using typical assumptions for equilibrium ratio in
residential buildings? - ANSWERS 0.13
,What is the highest working level that could be observed in a room having a
constant radon activity of 10 pCi/L ? - ANSWERS 0.1
f a radon measurement is calculated to be 7.8456 pCi/L, what number should be
written on the report to the client? - ANSWERS 7.8 pCi/L
A building has very high internal air circulation rate and was measured at 0.03WL.
What can be said about the radon concentrations? - ANSWERS The radon is
probably more than 6 pCi/L.
What is the approximate outdoor radon concentration? - ANSWERS 0.4 pCi/L
Within the U.S, the EPA believes the average annual indoor radon activity to be: -
ANSWERS 1.3 pCi/L
What would be the expected working levels in a room at 4 pCi/L, using typical
assumptions for equilibrium ratio in residential buildings? - ANSWERS 0.02 WL
In order to calculate the equilibrium ratio in a home you need to know: -
ANSWERS Results of simultaneous measurements of radon and radon decay
products.
Lung cancer risks exist with exposures to radon concentrations below 4pCi/L. -
ANSWERS True
, Short-term measurements can be factored by the time of deployment to
determine a year-long average. - ANSWERS False
The results of a short-term, closed building test indicates the highest the radon
could ever be. - ANSWERS False
Radon is only a concern in homes, not in schools and workplaces. - ANSWERS
False
When emitted within the lungs, which one of the three ionizing radiation types
causes the most cell damage within the lung? - ANSWERS alpha particle
The health risk of radon has most strongly been determined by what studies? -
ANSWERS Occupational exposures and lung cancer incidence in underground
miners Miner Studies
According to the most recent version of U.S. EPA's Home Buyer's and Seller's
Guide, what is the estimated number of cancer deaths that occur annually in the
United States from radon exposure in homes? - ANSWERS 15,000 - 22,000
Referring to the most recent health risk chart from the U.S. EPA's Citizen's Guide,
who would have the greater lifetime risk of contracting radon-induced lung
cancer? A smoker in a home at 4 pCi/L A former smoker at 10 pCi/L | A never
smoker at 20 pCi/L A never smoker at 100 pCi/L - ANSWERS A never-smoker at
100 pCi/L.
According to EPA's linear, no-threshold health risk model, which set of
circumstances would present the highest health risk from radon?(Assume all
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100% CORRECT |
NEW UPDATE 2025
If a sample of radon is taken from a room that is known to be at 125pCi/L and is
kept in a well sealed container, what will the approximate radon activity be within
the container after eight days? - ANSWERS 31.3
Radon decay products have longer or shorter half lives than radon gas? -
ANSWERS Shorter
The ionization of an otherwise electrically neutral atom is used in measuring
radiation. Which process best describes ionization? - ANSWERS An uncharged
atom gains or loses orbital electrons and becomes electrically charged.
Give three characteristics of radon - ANSWERS Half life of 3.8 days
Inert
Can't sense (see, smell, or taste)
Radioactive
Naturally occurring
Gas
If a room within a home is determined to be at 25 pCi/L, what working level would
be expected in this room using typical assumptions for equilibrium ratio in
residential buildings? - ANSWERS 0.13
,What is the highest working level that could be observed in a room having a
constant radon activity of 10 pCi/L ? - ANSWERS 0.1
f a radon measurement is calculated to be 7.8456 pCi/L, what number should be
written on the report to the client? - ANSWERS 7.8 pCi/L
A building has very high internal air circulation rate and was measured at 0.03WL.
What can be said about the radon concentrations? - ANSWERS The radon is
probably more than 6 pCi/L.
What is the approximate outdoor radon concentration? - ANSWERS 0.4 pCi/L
Within the U.S, the EPA believes the average annual indoor radon activity to be: -
ANSWERS 1.3 pCi/L
What would be the expected working levels in a room at 4 pCi/L, using typical
assumptions for equilibrium ratio in residential buildings? - ANSWERS 0.02 WL
In order to calculate the equilibrium ratio in a home you need to know: -
ANSWERS Results of simultaneous measurements of radon and radon decay
products.
Lung cancer risks exist with exposures to radon concentrations below 4pCi/L. -
ANSWERS True
, Short-term measurements can be factored by the time of deployment to
determine a year-long average. - ANSWERS False
The results of a short-term, closed building test indicates the highest the radon
could ever be. - ANSWERS False
Radon is only a concern in homes, not in schools and workplaces. - ANSWERS
False
When emitted within the lungs, which one of the three ionizing radiation types
causes the most cell damage within the lung? - ANSWERS alpha particle
The health risk of radon has most strongly been determined by what studies? -
ANSWERS Occupational exposures and lung cancer incidence in underground
miners Miner Studies
According to the most recent version of U.S. EPA's Home Buyer's and Seller's
Guide, what is the estimated number of cancer deaths that occur annually in the
United States from radon exposure in homes? - ANSWERS 15,000 - 22,000
Referring to the most recent health risk chart from the U.S. EPA's Citizen's Guide,
who would have the greater lifetime risk of contracting radon-induced lung
cancer? A smoker in a home at 4 pCi/L A former smoker at 10 pCi/L | A never
smoker at 20 pCi/L A never smoker at 100 pCi/L - ANSWERS A never-smoker at
100 pCi/L.
According to EPA's linear, no-threshold health risk model, which set of
circumstances would present the highest health risk from radon?(Assume all
