Radon Measurement Professional Exam
(InterNACHI and AARST)| Questions and
100% Complete Solutions
The objective of a sub-slab or sub-membrane depressurization system is to create a _____
beneath the foundation, which is greater in strength than the vacuum imposed on the soil
by the house itself. - ✔vacuum
T/F: Radon gas is approximately seven times heavier than air. - ✔true
We estimate that about 1 in _____ homes nationwide have levels at or above the level of 4
pCi/l, the level at which it is recommended to take action to reduce concentrations. - ✔15
T/F: You can see, feel, smell, and taste radon. - ✔false
This standard of practice specifies procedures and minimum requirements when measuring
radon concentrations in _____ residences for determining if radon mitigation is necessary to
protect current and future occupants. - ✔single-family
This standard applies to homeowners, professionals and any other party seeking to determine if
radon mitigation is necessary for _____ purposes. - ✔real estate or non-real estate
_____ on any parcel of land can have a radon problem. - ✔any home
,_____ is the only way to know if there's a radon problem in a house. - ✔testing
T/F: New homes do NOT need to be tested. - ✔false
T/F: Every home should be tested to include new and old homes. - ✔true
Homes can be tested at _____ time of the year. - ✔any
T/F: To prevent the possibility of long-term exposure to a radon hazard, homeowners
should take the opportunity to test in association with moving into any new or existing
home or dwelling. - ✔true
T/F: Avoid testing during unusual local severe weather if the test period is less than 4 days.
- ✔true
"_____" are those that collect a time-weighted average and do not provide hourly readings. -
✔passive devices
"_____" are monitors that can integrate, record and produce reviewable readings in time
increments of 1 hour, and can be recalibrated periodically. - ✔continuous monitors
T/F: Testing can begin with Short-Term testing under closed building conditions to quickly
identify if a radon hazard is present. - ✔true
_____ testing protocol where a single testing event is used to quickly determine if mitigation is
necessary. - ✔time-sensitive
_____ testing protocol is where an initial short-term test is followed by confirmatory short-term
or long-term testing as needed. - ✔extended
, If the lowest level is not finished but could serve as a work area, playroom or additional
bedroom at some time in the future, a test _____ in this level of the home. - ✔is to
be
conducted
T/F: Tests conducted in areas above a basement can fail to characterize a radon hazard
if heating systems are not active during the test. - ✔true
Additional test locations are specifically recommended for large homes, where the footprint
on the level of the home being tested is over _____. - ✔2,000 square feet
_____ test locations are specifically recommended for each area of the home served by a
different heating and cooling system. - ✔additional
T/F: Additional test locations are specifically recommended for each unique foundation
area, including split-level foundations or where slab-on-grade rooms attach to basement or
crawlspace areas. - ✔true
Place detectors at least _____ from exterior doors and windows or other potential openings to
the outdoors. - ✔3 feet / 36 inches
Detectors must be located not less than _____ above the floor. - ✔20 inches
Detectors should be located no less than _____ from other test detectors and objects that are
above or to the side of the detector. - ✔4 inches
Detectors _____ to be placed inside a closet for protection. - ✔are NOT permitted
Direct sunlight _____ affect the detector's performance. - ✔does
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