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Exam (elaborations)

CIH Sample Questions Questions and Answers

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CIH Sample Questions Questions and Answers

Institution
CIH
Course
CIH

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CIH Sample Questions Questions
and Answers
AAmixtureAcontains:

50AmLAbenzeneA(m.w.=78)Av.p.A=A75Amm,AHgAsp.Agr.A=A0.879.

25AmLAcarbonAtetrachlorideA(m.w.A=A154),Av.p.A=A91Amm,AHgAsp.Agr.A=A1.595

25AmLAtrichloroethyleneA(m.w.A=A131.5),Av.p.A=A58Amm,AHgAsp.Agr.A=A1.455.

AssumingARaoult'sALawAisAobeyed,AwhatAwillAbeAtheAconcentrationAofAbenzeneAinAairAatA76
0AmmAHgAsaturatedAwithAvaporAofAtheAaboveAmixture?A-AAnswerA5.1%



WhatAisAtheAACGIHAThresholdALimitAValueAforAfluorideAprimarilyAintendedAtoAguardAagainst
A-AAnswerARespiratoryAtractAIrritation



UnderAusualAoperatingAconditions,AwhatAisAtheAstaticApressureAatAtheAdischargeAsideAofAaAf
anA10'AlengthAofAdischargeAduct?A-AAnswerAGreaterAthanAtheAatmosphericApressure



1000AcfmAisAtoAbeAdrawnAintoAaAround,AfreelyAsuspendedAductAofA6"Adiameter.AWhatAisAt
heAexpectedAcenterlineAvelocityAatA4"AoutsideAtheAductAopening?A-AAnswerA765Afpm



WorkersAinAaAbrassAfoundryAcomplainAofAaAfeverAandAgeneralAmailaiseAonAMondayAfollowin
gAaAweekendArespiteAfromAwork.AWhatAshouldAanAIHAbeAequippedAtoAobtainAuponAarrivalA
atAtheAfoundry?A-AAnswerAAirAsamplesAtoAmeasureAexposureAtoAzincAfumes



WhatAdoAtheAradioisotopesA238U,A40K,A226RaAandA235AUAhaveAinAcommon?A-
AAnswerAEachAoccursAinAnature



WhyAisAstackAsamplingAforAparticulateAaerosolsAdoneAinAanAisokineticAmanner?A-
AAnswerAToAavoidAsizeAdiscriminationAofAcollectedAparticles



Theoretically,AwhatAisAtheAminimumAnumberAofAsoundApressureAlevelAmeasurementsAneeded
AtoAdetermineAtheAsoundApowerAoutputAfromAaAnon-
directionalAnoiseAsourceAinAaAfreeAfield?A-AAnswerAOne
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Institution
CIH
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CIH

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Uploaded on
May 19, 2026
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Written in
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