Radon Review Quiz 6 (Mitigation) Latest 2026
Questions and Correct Detailed Answers Already
Graded A+
How long should you retain records for the installation of a radon system?
Select one:
a. 2 years
b. 4 years
c. 6 years
d. 20 years - CORRECT ANSWER-c. 6 years
If a post-installation pressure test shows that a soil depressurization system is
fully extending the pressure field over the intended zone, but a satisfactory radon
reduction has not been achieved, which of the following would NOT be a logical
next step?
Select one:
a. Add an additional slab suction point.
b. Look for entry routes in the walls.
,c. Check for re-entrainment.
d. Determine whether the water supply is an entry route. - CORRECT ANSWER-
a. Add an additional slab suction point.
A measurement of the differential pressure across a slab is carried out by a
mitigator on a day characterized by gusts of wind. In comparison to
measurements made on a calm day, the windy day pressure differential readings
across the slab will:
Select one:
a. Remain constant
b. Increase
c. Fluctuate
d. Decrease - CORRECT ANSWER-c. Fluctuate
A mitigator is called to a house with a basement that has a radon reading of 20
pCi/L. Half of the basement is finished, and it has parquet flooring. Since all
diagnostic testing is to be performed, which of the following would be the most
logical test to perform FIRST?
Select one:
, a. Suction-field extension testing in the unfinished portion of the basement, with
one or two vacuum-cleaner suction holes, and with pressure-test holes at
distances of 1, 5, 10, and 15 feet in at least two directions away from each test
hole.
b. Suction-field extension testing, with one vacuum-cleaner suction hole each in
the finished and unfinished portions of the basement, and four pressure-test
holes (one in each corner) in each portion.
c. Sub-slab radon concentration measurements, through three or four sample
holes each in the finished and unfinished portions of the basement.
d. Suction-field extension testing in the unfinished port - CORRECT ANSWER-d.
Suction-field extension testing in the unfinished portion of the basement, with
one vacuum-cleaner suction hole, and one to four pressure-test holes at remote
corners of the unfinished portion.
A Pressure Field Extension (PFE) diagnostic test has been conducted with a
vacuum cleaner attached at preferred sub-slab suction point via a 2-foot length of
3-inch pipe. Three pitot tube measurements to determine air volume were made
with results of 0.045, 0.036 and 0.058 inches of water column. How much air is
being extracted by your shop vacuum (assuming an air temperature of 70 degrees
F)?
Select one:
a. 41 CFM
Questions and Correct Detailed Answers Already
Graded A+
How long should you retain records for the installation of a radon system?
Select one:
a. 2 years
b. 4 years
c. 6 years
d. 20 years - CORRECT ANSWER-c. 6 years
If a post-installation pressure test shows that a soil depressurization system is
fully extending the pressure field over the intended zone, but a satisfactory radon
reduction has not been achieved, which of the following would NOT be a logical
next step?
Select one:
a. Add an additional slab suction point.
b. Look for entry routes in the walls.
,c. Check for re-entrainment.
d. Determine whether the water supply is an entry route. - CORRECT ANSWER-
a. Add an additional slab suction point.
A measurement of the differential pressure across a slab is carried out by a
mitigator on a day characterized by gusts of wind. In comparison to
measurements made on a calm day, the windy day pressure differential readings
across the slab will:
Select one:
a. Remain constant
b. Increase
c. Fluctuate
d. Decrease - CORRECT ANSWER-c. Fluctuate
A mitigator is called to a house with a basement that has a radon reading of 20
pCi/L. Half of the basement is finished, and it has parquet flooring. Since all
diagnostic testing is to be performed, which of the following would be the most
logical test to perform FIRST?
Select one:
, a. Suction-field extension testing in the unfinished portion of the basement, with
one or two vacuum-cleaner suction holes, and with pressure-test holes at
distances of 1, 5, 10, and 15 feet in at least two directions away from each test
hole.
b. Suction-field extension testing, with one vacuum-cleaner suction hole each in
the finished and unfinished portions of the basement, and four pressure-test
holes (one in each corner) in each portion.
c. Sub-slab radon concentration measurements, through three or four sample
holes each in the finished and unfinished portions of the basement.
d. Suction-field extension testing in the unfinished port - CORRECT ANSWER-d.
Suction-field extension testing in the unfinished portion of the basement, with
one vacuum-cleaner suction hole, and one to four pressure-test holes at remote
corners of the unfinished portion.
A Pressure Field Extension (PFE) diagnostic test has been conducted with a
vacuum cleaner attached at preferred sub-slab suction point via a 2-foot length of
3-inch pipe. Three pitot tube measurements to determine air volume were made
with results of 0.045, 0.036 and 0.058 inches of water column. How much air is
being extracted by your shop vacuum (assuming an air temperature of 70 degrees
F)?
Select one:
a. 41 CFM
