Radon Review Quiz 6 (Mitigation) Updated most Frequent Tested
Exam 2026 WITH Recent Newest Verified And Well Analyzed Exam
Questions (Actual Exam 2026-2027) Correct Detailed & Verified
ANSWERS (100% Accurate Solutions) ALREADY GRADED A+||NEWEST
VERSION Of The Exam Guarantee Pass!!
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
b. 5,828 CFM
c. 72 CFM
d. 88 CFM -ANSWERS-a. 41 CFM
Assuming a pipe diameter of 3 inches since that is what you made the pitot tube measurements
inside, one multiplies the velocity obtained by the cross-sectional area of the pipe.
Cross sectional Area = п r2
Cross sectional area of 3 inch pipe = 3.14 x 1.52 = 3.14 x 2.25 = 7.065 sq inches.
Cross Sectional Area =7.065 sq in / 144 = 0.049 sq ft
825 Feet per minute x 0.049 Sq feet = 40.5 CFM Cubic Feet per Minute (round up to 41 CFM)
, A radon mitigation worker spends a day and a half working in a house that had been previously
tested at 12 pCi/L with a follow-up test of 8 pCi/L. What exposure has the worker received that
would be recorded in their file, assuming after completing the job he/she went fishing rather
than start another radon job?
Select one:
a. 0.080 WLM
b. 0.0085 WLM
c. 0.0094 WLM
d. 0.0042 WLM -ANSWERS-b. 0.0085 WLM
Calculate radon decay products in units of WL assuming a 100% Equilibrium Factor
WL = 12 * 1.0/100 = 0.12 WL
WLM = WL x hours/170 hours
A single point sub-slab suction system was installed in a basement house, with a 200-cfm fan
capable of drawing 1.5 inches of water (WC) suction. Radon levels, however, are still somewhat
elevated. During cold weather, suctions are measured under the slab in four test holes, each 15
feet away from the suction pipe in a different direction. The pressure differentials across the
slab at the four holes are: Hole A: -0.015 inch of water (WC); Hole B: -0.02 inch of water (WC);
Hole C: -0.002 inch of water (WC); Hole D: +0.002 inch of water (WC). Measurements in the
suction pipe indicate flows of 150 cfm and suction of 0.1 inch of water (WC). From the available
information, which of the following would be the most reasonable next response?
Select one:
a. Immediately install two additional suction pipes in the vicinity of holes C and D.
b. Remove the pipe and excavate a hole of at least 2 cubic feet underneath the slab at -
ANSWERS-c. Inspect the system piping and the slab for sites where basement air could be
leaking into the system; close any leaks discovered.
Exam 2026 WITH Recent Newest Verified And Well Analyzed Exam
Questions (Actual Exam 2026-2027) Correct Detailed & Verified
ANSWERS (100% Accurate Solutions) ALREADY GRADED A+||NEWEST
VERSION Of The Exam Guarantee Pass!!
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
b. 5,828 CFM
c. 72 CFM
d. 88 CFM -ANSWERS-a. 41 CFM
Assuming a pipe diameter of 3 inches since that is what you made the pitot tube measurements
inside, one multiplies the velocity obtained by the cross-sectional area of the pipe.
Cross sectional Area = п r2
Cross sectional area of 3 inch pipe = 3.14 x 1.52 = 3.14 x 2.25 = 7.065 sq inches.
Cross Sectional Area =7.065 sq in / 144 = 0.049 sq ft
825 Feet per minute x 0.049 Sq feet = 40.5 CFM Cubic Feet per Minute (round up to 41 CFM)
, A radon mitigation worker spends a day and a half working in a house that had been previously
tested at 12 pCi/L with a follow-up test of 8 pCi/L. What exposure has the worker received that
would be recorded in their file, assuming after completing the job he/she went fishing rather
than start another radon job?
Select one:
a. 0.080 WLM
b. 0.0085 WLM
c. 0.0094 WLM
d. 0.0042 WLM -ANSWERS-b. 0.0085 WLM
Calculate radon decay products in units of WL assuming a 100% Equilibrium Factor
WL = 12 * 1.0/100 = 0.12 WL
WLM = WL x hours/170 hours
A single point sub-slab suction system was installed in a basement house, with a 200-cfm fan
capable of drawing 1.5 inches of water (WC) suction. Radon levels, however, are still somewhat
elevated. During cold weather, suctions are measured under the slab in four test holes, each 15
feet away from the suction pipe in a different direction. The pressure differentials across the
slab at the four holes are: Hole A: -0.015 inch of water (WC); Hole B: -0.02 inch of water (WC);
Hole C: -0.002 inch of water (WC); Hole D: +0.002 inch of water (WC). Measurements in the
suction pipe indicate flows of 150 cfm and suction of 0.1 inch of water (WC). From the available
information, which of the following would be the most reasonable next response?
Select one:
a. Immediately install two additional suction pipes in the vicinity of holes C and D.
b. Remove the pipe and excavate a hole of at least 2 cubic feet underneath the slab at -
ANSWERS-c. Inspect the system piping and the slab for sites where basement air could be
leaking into the system; close any leaks discovered.
