RADON EXAM EXAM WITH CORRECT
QUESTIONS AND CORRECTRY ANALYZED
ANSWERS (ACTUAL EXAM) ALREADY
GRADED A+ LATEST 2025 – 2026
Which of the following values should be reported to the client if the radon was
calculated (from your computer) to be 3.4562315 pCi/L? - ANSWERS-3.5 pCi/L
Which one of the following is the BEST method of measuring the effectiveness of
any radon gas mitigation system? - ANSWERS-Making radon gas measurements
before and after mitigation
You arrive at a home to perform a radon measurement with an electret ion
chamber (EIC). Although you had informed the resident of the closed building
conditions required for this test, you notice the windows on the first floor and the
basement are open. According to EPA Measurement Device Protocols, an
appropriate action is to: - ANSWERS-close all windows, explain closed building
conditions again, and return to place the test device in 12 - 24 hours
,A short-term measurement of 3.5 pCi/L was made. What would be an appropriate
response to the client? - ANSWERS-Although a concern, current EPA guidance
indicates that further testing would not be warranted.
According to Protocols for Radon and Radon Decay Product Measurements in
Homes (non-real estate), the follow-up test should be a short-term test if the
initial test is greater than: - ANSWERS-8 pCi/L
The results of sequential testing in a real estate transaction produced 4.2 pCi/L
and 3.5 pCi/L. The best way of reporting these results to the client is to: -
ANSWERS-provide both measurements and their average to the client after both
tests are complete
A radon test was conducted using a long-term alpha track detector. The lab
results were calculated to be 6.785 pCi/L. What number should be provided to the
client in the report? - ANSWERS-6.8 pCi/L
When providing results of radon tests they should be rounded to the nearest
single decimal. In this case it would be rounded to 6.8 pCi/L.
A short-term test using an electret ion chamber was initiated on April 17th at 2:45
PM. It was retrieved on April 19th at 1:30 PM. According to the 2014 ANSI/AARST
Protocol for measurements in homes, is this a valid short-term test, assuming
proper conditions were met prior to and all during the test? - ANSWERS-Yes, it
was since it was at least 46 hours in duration.
Although one should strive for 48 hour minimum duration the AARST protocol
allows for a test to be picked up a little early provided it has tested at least 46
hours.
,What is radon? - ANSWERS-An invisible, odorless, tasteless, naturally occurring,
radioactive gas.
What is the minimum deployment/sampling period for a short-term test? -
ANSWERS-Two days
What is the purpose of the US EPA Map of Radon Zones? - ANSWERS-To suggest
where radon resistant new construction techniques would be the most cost-
effectively employed.
Which of the following best represents the recommendation of the U.S. EPA for
citizen exposure to radon? - ANSWERS-Long-term exposure to elevated radon can
increase the potential for lung cancer
Which of the following is an acceptable location for the discharge of an active soil
depressurization system? - ANSWERS-Above the eave of the roof.
Which of the following locations is appropriate for the fan of an active soil
depressurization system? - ANSWERS-Attic
Which of the following Radon measurement approaches best estimates occupant
exposure? - ANSWERS-A yearlong test with an alpha track detector in the lowest
occupied level of the home with no special precautions for closed building
conditions.
, A correct statement regarding radon testing in Zone 3 areas of the EPA Radon
Potential Map is that such testing: - ANSWERS-is recommended.
A significant difference between one room and the next in a building with a large
central air handling system is often caused by: - ANSWERS-An unbalanced air
distribution system
After 25 years of updates by testers and state agencies, the US EPA Map of Radon
Zones is a good predictor of where indoor radon levels will not be elevated. -
ANSWERS-False
How can you tell if a house contains elevated levels of radon? - ANSWERS-Test for
radon.
If a short-term, closed building radon test is conducted in the basement of a
home with a result of 10 pCi/L, what can be said about the radon levels on the
first floor above the basement? - ANSWERS-The first floor radon level is likely to
be equal to or less than the basement measurement of 10
If the water for a home comes from an underground well that has 60,000 pCi/L in
the water, how much radon will be added to the air of the home due to normal
usage of water? - ANSWERS-6 to 10 pCi/L
In a cold climate, stack effect is typically higher during the: - ANSWERS-Winter
QUESTIONS AND CORRECTRY ANALYZED
ANSWERS (ACTUAL EXAM) ALREADY
GRADED A+ LATEST 2025 – 2026
Which of the following values should be reported to the client if the radon was
calculated (from your computer) to be 3.4562315 pCi/L? - ANSWERS-3.5 pCi/L
Which one of the following is the BEST method of measuring the effectiveness of
any radon gas mitigation system? - ANSWERS-Making radon gas measurements
before and after mitigation
You arrive at a home to perform a radon measurement with an electret ion
chamber (EIC). Although you had informed the resident of the closed building
conditions required for this test, you notice the windows on the first floor and the
basement are open. According to EPA Measurement Device Protocols, an
appropriate action is to: - ANSWERS-close all windows, explain closed building
conditions again, and return to place the test device in 12 - 24 hours
,A short-term measurement of 3.5 pCi/L was made. What would be an appropriate
response to the client? - ANSWERS-Although a concern, current EPA guidance
indicates that further testing would not be warranted.
According to Protocols for Radon and Radon Decay Product Measurements in
Homes (non-real estate), the follow-up test should be a short-term test if the
initial test is greater than: - ANSWERS-8 pCi/L
The results of sequential testing in a real estate transaction produced 4.2 pCi/L
and 3.5 pCi/L. The best way of reporting these results to the client is to: -
ANSWERS-provide both measurements and their average to the client after both
tests are complete
A radon test was conducted using a long-term alpha track detector. The lab
results were calculated to be 6.785 pCi/L. What number should be provided to the
client in the report? - ANSWERS-6.8 pCi/L
When providing results of radon tests they should be rounded to the nearest
single decimal. In this case it would be rounded to 6.8 pCi/L.
A short-term test using an electret ion chamber was initiated on April 17th at 2:45
PM. It was retrieved on April 19th at 1:30 PM. According to the 2014 ANSI/AARST
Protocol for measurements in homes, is this a valid short-term test, assuming
proper conditions were met prior to and all during the test? - ANSWERS-Yes, it
was since it was at least 46 hours in duration.
Although one should strive for 48 hour minimum duration the AARST protocol
allows for a test to be picked up a little early provided it has tested at least 46
hours.
,What is radon? - ANSWERS-An invisible, odorless, tasteless, naturally occurring,
radioactive gas.
What is the minimum deployment/sampling period for a short-term test? -
ANSWERS-Two days
What is the purpose of the US EPA Map of Radon Zones? - ANSWERS-To suggest
where radon resistant new construction techniques would be the most cost-
effectively employed.
Which of the following best represents the recommendation of the U.S. EPA for
citizen exposure to radon? - ANSWERS-Long-term exposure to elevated radon can
increase the potential for lung cancer
Which of the following is an acceptable location for the discharge of an active soil
depressurization system? - ANSWERS-Above the eave of the roof.
Which of the following locations is appropriate for the fan of an active soil
depressurization system? - ANSWERS-Attic
Which of the following Radon measurement approaches best estimates occupant
exposure? - ANSWERS-A yearlong test with an alpha track detector in the lowest
occupied level of the home with no special precautions for closed building
conditions.
, A correct statement regarding radon testing in Zone 3 areas of the EPA Radon
Potential Map is that such testing: - ANSWERS-is recommended.
A significant difference between one room and the next in a building with a large
central air handling system is often caused by: - ANSWERS-An unbalanced air
distribution system
After 25 years of updates by testers and state agencies, the US EPA Map of Radon
Zones is a good predictor of where indoor radon levels will not be elevated. -
ANSWERS-False
How can you tell if a house contains elevated levels of radon? - ANSWERS-Test for
radon.
If a short-term, closed building radon test is conducted in the basement of a
home with a result of 10 pCi/L, what can be said about the radon levels on the
first floor above the basement? - ANSWERS-The first floor radon level is likely to
be equal to or less than the basement measurement of 10
If the water for a home comes from an underground well that has 60,000 pCi/L in
the water, how much radon will be added to the air of the home due to normal
usage of water? - ANSWERS-6 to 10 pCi/L
In a cold climate, stack effect is typically higher during the: - ANSWERS-Winter
