NRPP Radon Measurements | 160 QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS 100% CORRECT | NEW UPDATE
2026
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? - {✔✔ANSWER✔✔}-31.3
Radon decay products have (or )longer shorter half lives than
radon gas? - {✔✔ANSWER✔✔}-Shorter
The ionization of an otherwise electrically neutral atom is used
in measuring radiation. Which process best describes
ionization? - {✔✔ANSWER✔✔}-An uncharged atom gains
or loses orbital electrons ()and becomes electrically charged.
,Give three characteristics of radon - {✔✔ANSWER✔✔}-
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? -
{✔✔ANSWER✔✔}-0.13
What is the highest working level that could be observed in a
room having a constant radon activity of 10 pCi/L ? -
{✔✔ANSWER✔✔}-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? -
{✔✔ANSWER✔✔}-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? - {✔✔ANSWER✔✔}-The radon is
probably more than 6 pCi/L.
What is the approximate outdoor radon concentration? -
{✔✔ANSWER✔✔}-0.4 pCi/L
Within the U.S, the EPA believes the average annual indoor
radon activity to be: - {✔✔ANSWER✔✔}-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? - {✔✔ANSWER✔✔}-0.02 WL
In order to calculate the equilibrium ratio in a home you need
to know: - {✔✔ANSWER✔✔}-Results of simultaneous
measurements of radon and radon decay products.
Lung cancer risks exist with exposures to radon concentrations
below 4pCi/L. - {✔✔ANSWER✔✔}-True
WITH COMPLETE SOLUTIONS 100% CORRECT | NEW UPDATE
2026
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? - {✔✔ANSWER✔✔}-31.3
Radon decay products have (or )longer shorter half lives than
radon gas? - {✔✔ANSWER✔✔}-Shorter
The ionization of an otherwise electrically neutral atom is used
in measuring radiation. Which process best describes
ionization? - {✔✔ANSWER✔✔}-An uncharged atom gains
or loses orbital electrons ()and becomes electrically charged.
,Give three characteristics of radon - {✔✔ANSWER✔✔}-
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? -
{✔✔ANSWER✔✔}-0.13
What is the highest working level that could be observed in a
room having a constant radon activity of 10 pCi/L ? -
{✔✔ANSWER✔✔}-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? -
{✔✔ANSWER✔✔}-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? - {✔✔ANSWER✔✔}-The radon is
probably more than 6 pCi/L.
What is the approximate outdoor radon concentration? -
{✔✔ANSWER✔✔}-0.4 pCi/L
Within the U.S, the EPA believes the average annual indoor
radon activity to be: - {✔✔ANSWER✔✔}-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? - {✔✔ANSWER✔✔}-0.02 WL
In order to calculate the equilibrium ratio in a home you need
to know: - {✔✔ANSWER✔✔}-Results of simultaneous
measurements of radon and radon decay products.
Lung cancer risks exist with exposures to radon concentrations
below 4pCi/L. - {✔✔ANSWER✔✔}-True
