RADON MEASUREMENT PROFESSIONAL EXAM (INTERNACHI AND AARST) LATEST 2026/2027 ACTUAL EXAM QUESTIONS WITH CORRECT ANSWERS 100% VERIFIED GRADED A+

RADON MEASUREMENT
PROFESSIONAL EXAM (INTERNACHI
AND AARST) LATEST 2026/2027
ACTUAL EXAM QUESTIONS WITH
CORRECT ANSWERS 100% VERIFIED
GRADED A+
1. Am_____mrefersmtomthemseriesmofmtransformationsmthatmamgivenmradionuclidemwillmundergo,
masmwellmasmthemkindmofmradiationmitmemits,mwhichmaremcharacteristicmofmthemradionuclidem


-mCORRECTmANSWERmdecaymchain



2. _____maremthemextremelymsmallmparticlesmofmwhichmwe,mandmeverythingmaroundmus,marem
made.m-mCORRECTmANSWERmatoms



3. IfmonematommweremthemsizemofmthemHoustonmAstrodome,mitsmnucleusmwouldmbemroughlymt
hemsizemofmam_____.m-mCORRECTmANSWERmpea



4. T/F:mThembalancemofmthemforcesminmthemnucleusmofmanmatommdeterminesmwhethermamnucle
usmismstablemormunstablem(radioactive).m-mCORRECTmANSWERmtrue



5. Asmanmunstablemnucleusmemitsmradiationmasmitmdisintegrates,mthemradionuclidemtransforms
mtomdifferentmnuclides,mandmthismprocessmismcalledm_____.m-


mCORRECTmANSWERmradioactivemdecay




6. _____mismthemenergymthatmismreleasedmasmparticlesmormraysmduringmradioactivemdecay.m-
mCORRECTmANSWERmradiation




7. _____mparticlesmincludemtwomprotonsmandmtwomneutrons.m-mCORRECTmANSWERmalpha

,8. We'remreallymconcernedmwithmthem_____mparticles,mbecausemtheymcanmbemstoppedmbymams
heetmofmpapermwheremtheymreleasemtheirmenergy.m-mCORRECTmANSWERmalpha



9. Somemdecaymproductsmofmradonmemitmbetamparticles,mbutmitsmalpha-
emittingmdecaymproductsmposemammuchm_____mhealthmrisk.m-mCORRECTmANSWERmgreater



10. _____mphotonsmcanmpassmthroughmmanymkindsmofmmaterials,mincludingmhumanmtissue.m-
mCORRECTmANSWERmgamma




11. _____maremthemsourcemofmcellmdamageminmthemlungs.m-
mCORRECTmANSWERmRDPsm(radonmdecaymproducts)




12. T/F:mRadonmgasmtastesmlikemsulphur.m-mCORRECTmANSWERmfalse



13. T/F:mIfmRDPsmplatemoutmonmamwall,mtheymaremamhazard.m-mCORRECTmANSWERmfalse



14. Ifmthemradonmconcentrationmism75mpCi/L,mandmthemdecay-
productmconcentrationmism0.3mWL,mthemequilibriummratiomwouldmbemcalculatedmasmfollows:
mERm=m(0.3)mxm(100)m/m75m=m_____.m-mCORRECTmANSWERm0.4




15. Themaveragemindoormradonmlevelmism_____mpCi/L.m-mCORRECTmANSWERm1.3



16. Ifmamgallonmcontainermheldmairmwithm4mpCi/L,mtheremwouldmbemaboutm4m(quartsmpermgallon)
mmultipliedmbym4m(pCi/L)mmultipliedmbym2.22mdisintegrationsmpermminutes,mormaboutm____


_mdisintegrationsmpermminutesmofmradonmatomsminmthemcontainer.m-
mCORRECTmANSWERm35.2




17. Radonmismthem_____mmostmimportantmcausemofmlungmcancermaftermsmokingminmmanymcoun
tries.m-mCORRECTmANSWERm2nd

, 18. T/F:mThemWorldmHealthmOrganizationm(WHO)msaysmradonmcausesmupmtom15%mofmlungmcanc
ersmworldwide.m-mCORRECTmANSWERmtrue



19. T/F:mTheremexistsmamknownmthresholdmconcentrationmbelowmwhichmradonmexposuremprese
ntsmnomrisk.m-mCORRECTmANSWERmfalse



20. T/F:mSincemalphamparticlesmaremmoremmassivemandmmoremhighlymchargedmthanmothermtype
smofmionizingmradiation,mtheymaremmoremdamagingmtomlivingmtissue.m-
mCORRECTmANSWERmtrue




21. T/F:mEvidencemexistsmthatmshowsmamthresholdmofmexposurembelowmwhichmradonmlevelsmare
mharmless.m-mCORRECTmANSWERmfalse




22. T/F:mRadonmismamknownmhumanmlungmcarcinogenmandmismthemlargestmsourcemofmradiationme
xposuremandmriskmtomthemgeneralmpublic.m-mCORRECTmANSWERmtrue



23. Amdifferenceminm_____mbetweenmthembasementmormcrawlspacemandmthemsurroundingmsoilm
drawsmradonmintomthemhome.m-mCORRECTmANSWERmairmpressure



24. Themobjectivemofmamsub-slabmormsub-
membranemdepressurizationmsystemmismtomcreatemam_____mbeneathmthemfoundation,mwhic
hmismgreaterminmstrengthmthanmthemvacuummimposedmonmthemsoilmbymthemhousemitself.m-
mCORRECTmANSWERmvacuum




25. T/F:mRadonmgasmismapproximatelymsevenmtimesmheaviermthanmair.m-
mCORRECTmANSWERmtrue