Radon Review Quiz 6
(Mitigation)Questions and
Answers with Complete
Solutions 100% Correct
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 - {✔✔ANSWER✔✔}-c. Fluctuate
Which of the following factors is least likely to influence radon fluctuations within a given house?
Select one:
a. Mechanical air system operation
, b. Occupant behavior
c. Soil radium concentration
d. Weather conditions - {✔✔ANSWER✔✔}-c. Soil radium concentration
Which statement is in accordance with Radon Mitigation Standards?
Select one:
a. Whenever possible, radon vent fans shall be installed in a horizontal run of vent pipe
b. Radon vent fans may be located in a crawl space beneath a home, provided that at least one square
foot of crawl space vent area exists for every 1500 square feet of crawl space area
c. Radon vent fans used shall be designed for use as a radon fan by the manufacturer
d. Radon vent fans may be located below ground (buried). - {✔✔ANSWER✔✔}-c. Radon vent fans
used shall be designed for use as a radon fan by the manufacturer
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 - {✔✔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
(Mitigation)Questions and
Answers with Complete
Solutions 100% Correct
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 - {✔✔ANSWER✔✔}-c. Fluctuate
Which of the following factors is least likely to influence radon fluctuations within a given house?
Select one:
a. Mechanical air system operation
, b. Occupant behavior
c. Soil radium concentration
d. Weather conditions - {✔✔ANSWER✔✔}-c. Soil radium concentration
Which statement is in accordance with Radon Mitigation Standards?
Select one:
a. Whenever possible, radon vent fans shall be installed in a horizontal run of vent pipe
b. Radon vent fans may be located in a crawl space beneath a home, provided that at least one square
foot of crawl space vent area exists for every 1500 square feet of crawl space area
c. Radon vent fans used shall be designed for use as a radon fan by the manufacturer
d. Radon vent fans may be located below ground (buried). - {✔✔ANSWER✔✔}-c. Radon vent fans
used shall be designed for use as a radon fan by the manufacturer
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 - {✔✔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
