RADON REVIEW QUIZ 6 (MITIGATION)
UPDATE|EXAM
QUESTIONS WITH MULTIPLE
CHOICES |VERIFIED & REVISED
ANSWERS (NEW)!!!
Ammeasurementmofmthemdifferentialmpressuremacrossmamslabmismcarriedmoutmbymammitigatormonmamd
aymcharacterizedmbymgustsmofmwind.mInmcomparisonmtommeasurementsmmademonmamcalmmday,mthe
mwindymdaympressuremdifferentialmreadingsmacrossmthemslabmwill:
Selectmone:
a.mRemainmconstant
b.mIncrease
c.mFluctuate
d.mDecreasem-mCORRECTmANSWERmc.mFluctuate
Ammitigatormismcalledmtomamhousemwithmambasementmthatmhasmamradonmreadingmofm20mpCi/L.mHalfm
ofmthembasementmismfinished,mandmitmhasmparquetmflooring.mSincemallmdiagnosticmtestingmismtombem
performed,mwhichmofmthemfollowingmwouldmbemthemmostmlogicalmtestmtomperformmFIRST?
Selectmone:
a.mSuction-
fieldmextensionmtestingminmthemunfinishedmportionmofmthembasement,mwithmonemormtwomvacuum-
cleanermsuctionmholes,mandmwithmpressure-
testmholesmatmdistancesmofm1,m5,m10,mandm15mfeetminmatmleastmtwomdirectionsmawaymfrommeachmtest
mhole.
b.mSuction-fieldmextensionmtesting,mwithmonemvacuum-
cleanermsuctionmholemeachminmthemfinishedmandmunfinishedmportionsmofmthembasement,mandmfourm
pressure-testmholesm(oneminmeachmcorner)minmeachmportion.
, c.mSub-
slabmradonmconcentrationmmeasurements,mthroughmthreemormfourmsamplemholesmeachminmthemfini
shedmandmunfinishedmportionsmofmthembasement.
d.mSuction-fieldmextensionmtestingminmthemunfinishedmportm-mCORRECTmANSWERmd.mSuction-
fieldmextensionmtestingminmthemunfinishedmportionmofmthembasement,mwithmonemvacuum-
cleanermsuctionmhole,mandmonemtomfourmpressure-
testmholesmatmremotemcornersmofmthemunfinishedmportion.
AmPressuremFieldmExtensionm(PFE)mdiagnosticmtestmhasmbeenmconductedmwithmamvacuummcleanerm
attachedmatmpreferredmsub-slabmsuctionmpointmviamam2-footmlengthmofm3-
inchmpipe.mThreempitotmtubemmeasurementsmtomdeterminemairmvolumemweremmademwithmresultsm
ofm0.045,m0.036mandm0.058minchesmofmwatermcolumn.mHowmmuchmairmismbeingmextractedmbymyourm
shopmvacuumm(assumingmanmairmtemperaturemofm70mdegreesmF)?
Selectmone:
a.m41mCFM
b.m5,828mCFM
c.m72mCFM
d.m88mCFMm-mCORRECTmANSWERma.m41mCFM
Assumingmampipemdiametermofm3minchesmsincemthatmismwhatmyoummademthempitotmtubemmeasurem
entsminside,monemmultipliesmthemvelocitymobtainedmbymthemcross-sectionalmareamofmthempipe.
CrossmsectionalmAream=mпmr2
Crossmsectionalmareamofm3minchmpipem=m3.14mxm1.52m=m3.14mxm2.25m=m7.065msqminches.
CrossmSectionalmAream=7.065msqminm/m144m=m0.049msqmft
UPDATE|EXAM
QUESTIONS WITH MULTIPLE
CHOICES |VERIFIED & REVISED
ANSWERS (NEW)!!!
Ammeasurementmofmthemdifferentialmpressuremacrossmamslabmismcarriedmoutmbymammitigatormonmamd
aymcharacterizedmbymgustsmofmwind.mInmcomparisonmtommeasurementsmmademonmamcalmmday,mthe
mwindymdaympressuremdifferentialmreadingsmacrossmthemslabmwill:
Selectmone:
a.mRemainmconstant
b.mIncrease
c.mFluctuate
d.mDecreasem-mCORRECTmANSWERmc.mFluctuate
Ammitigatormismcalledmtomamhousemwithmambasementmthatmhasmamradonmreadingmofm20mpCi/L.mHalfm
ofmthembasementmismfinished,mandmitmhasmparquetmflooring.mSincemallmdiagnosticmtestingmismtombem
performed,mwhichmofmthemfollowingmwouldmbemthemmostmlogicalmtestmtomperformmFIRST?
Selectmone:
a.mSuction-
fieldmextensionmtestingminmthemunfinishedmportionmofmthembasement,mwithmonemormtwomvacuum-
cleanermsuctionmholes,mandmwithmpressure-
testmholesmatmdistancesmofm1,m5,m10,mandm15mfeetminmatmleastmtwomdirectionsmawaymfrommeachmtest
mhole.
b.mSuction-fieldmextensionmtesting,mwithmonemvacuum-
cleanermsuctionmholemeachminmthemfinishedmandmunfinishedmportionsmofmthembasement,mandmfourm
pressure-testmholesm(oneminmeachmcorner)minmeachmportion.
, c.mSub-
slabmradonmconcentrationmmeasurements,mthroughmthreemormfourmsamplemholesmeachminmthemfini
shedmandmunfinishedmportionsmofmthembasement.
d.mSuction-fieldmextensionmtestingminmthemunfinishedmportm-mCORRECTmANSWERmd.mSuction-
fieldmextensionmtestingminmthemunfinishedmportionmofmthembasement,mwithmonemvacuum-
cleanermsuctionmhole,mandmonemtomfourmpressure-
testmholesmatmremotemcornersmofmthemunfinishedmportion.
AmPressuremFieldmExtensionm(PFE)mdiagnosticmtestmhasmbeenmconductedmwithmamvacuummcleanerm
attachedmatmpreferredmsub-slabmsuctionmpointmviamam2-footmlengthmofm3-
inchmpipe.mThreempitotmtubemmeasurementsmtomdeterminemairmvolumemweremmademwithmresultsm
ofm0.045,m0.036mandm0.058minchesmofmwatermcolumn.mHowmmuchmairmismbeingmextractedmbymyourm
shopmvacuumm(assumingmanmairmtemperaturemofm70mdegreesmF)?
Selectmone:
a.m41mCFM
b.m5,828mCFM
c.m72mCFM
d.m88mCFMm-mCORRECTmANSWERma.m41mCFM
Assumingmampipemdiametermofm3minchesmsincemthatmismwhatmyoummademthempitotmtubemmeasurem
entsminside,monemmultipliesmthemvelocitymobtainedmbymthemcross-sectionalmareamofmthempipe.
CrossmsectionalmAream=mпmr2
Crossmsectionalmareamofm3minchmpipem=m3.14mxm1.52m=m3.14mxm2.25m=m7.065msqminches.
CrossmSectionalmAream=7.065msqminm/m144m=m0.049msqmft
