Questions and
Answers Updated
2026 A+
PresbycusisB-BAnswerHearingBlossBdueBtoBoldBage
PresbyopiaB-BAnswerimpairedBvisionBasBaBresultBofBaging,BdifficultyBfocusing
ByssinosisB-
BAnswerDiseaseBfromBinhalingBcottonBfibers.BAlsoBcalledB"brownBlungBdisease"BorB"Mo
ndayBfever".BReactionBagainstBcotton,Blinen,BhempBproductsBinBtextile/fabricBindustry.
FourB(4)BtypesBofBhumanBerrorsBdiscussedBinBHumanBFactorsBEngineering.B-
BAnswer"ErrorsBC.O.S.T.BtimeBandBmoney"
1.BCommission:BdoingBsomethingBwrong
2.BOmission:BleavingBsomethingBout
3.BSequence:BdoingBsomethingBinBtheBwrongBorder
4.BTiming:BdoingBsomethingBoutBofBallottedBtime,BtooBfastBorBtooBslow
DoesBtheBemployersBhaveBtoBpostBOSHABcitations?B-
BAnswerYes,BforB3BdaysBorBuntilBcorrected.
AudiogramB-BAnswerWrittenBrecordBofBhearingBthresholdBatBspecifiedBfrequencies.
,AudiometerB-
BAnsweraBdeviceBthatBcanBpresentBtonesBofBdifferentBfrequencies,BfromBlowBinBpitchBt
oBhighBinBpitch,BatBdifferentBvolumesBfromBsoftBtoBloud
WhatBdBBatB3000BhzBduringBanBaudiogramBmeansBtheBpersonBcan'tBhearBtheBtone?B-
BAnswer30BdB
FactorsBthatBaffectBabsorptionBofBnoiseB-
BAnswerangleBtoBnoiseBsource,BfrequencyBofBnoise,Bdensity,Bcondition/cleanliness,Btype
BofBmounting,BshapeBofBsurface
ToBimproveBnoiseBabsorptionBthroughBengineeringBcontrols,BwhatBpropertiesBdoByouBw
ant?B-BAnswerGoodBporosity,Bthickness,BairBgaps
EmissivityB-
BAnswerRatioBofBradiationBemittedBbyBaBsurfaceBtoBtheBradiationBemittedBbyBaBblackB
bodyBatBtheBsameBtemperature.BABblackBbodyBisB1.0B(highest),BdownBtoB0B(bright,Bref
lectiveBsurfaces).
EmissivityBofBbrightBmetalBsurfacesB-BAnswerLowB-
BlessBthanB0.1B(brightBmetalBisBaBgoodBreflector),BmeaningBitBisBgoodBforBreducingBra
diantBheat.
EmissivityBofBunpolishedBsurfacesB-
BAnswerCloseBtoB1.0,BwhichBisBhigh,BmeaningBnotBgreatBforBreducingBradiantBheat.
CarpalBtunnelBaffectsBwhatBnerveBandBwhatBpartsBofBtheBhand?B-
BAnswerMedianBnerve.BThumb,BpointerBandBringBfingers,BNOTBtheBpinky.BInflammation
BandBpainBinBtheBwrist.BThenarBwastingBisBsignBofBadvancedBdisease.
MetalBFumeBFeverB-
BAnswerAcuteBconditionBfromBbriefBhighBexposureBtoBmetalBfumesB(e.g.,Bzinc,Bmagnesi
um,BtheirBoxides).BSymptomsBappearBfromB4BtoB12BhoursBafterBexposureB--
,Bfever,BshakingBchillsB(flu-
like).BRecoveryBisBquick.BWorkersBcanBdevelopBimmunity,BbutBaBbreakBandBre-
exposureBnormallyBmakesBitBworse.
WhatBdoBaltitudeBchangesBaffectB(andBnotBaffect)BregardingBfans?B-
BAnswerHorsepowerBneededB(airBhasBlessBmass),BstaticBpressureB(notBasBmuchBneeded
).BButBtheBCFMB(volumetricBrate)BisBNOTBchangedBbyBaltitude,BandBneitherBisBRPMBof
BtheBfan.
SCBAB&BairlineBrespiratorBrulesB-
BAnswerMustBbeBGradeBDBorBhigher;BcanBuseBhighBpressureBair;BoilBpumpedBwithBfilt
eringBisBacceptable.BMedicalBoxygenBisBNOTBallowedB-
BdangerousBbecauseBofBincreasedBflammability.
Abduction,Badduction,Bflexion,BextensionB-
BAnswerAdbuction:BincreasingBangleBofBarmBtoBbody,BAWAY.
Adduction:BdecreasingBangleBofBarmBtoBbody,BTOWARD.
Extension:BincreasingBangleBofBforearmBtoBbicep.
Flexion:BdecreasingBangleBofBforearmBtoBbicep.
GradeBDBbreathingBairB-BAnswer19.5%-23.5%Boxygen
<5Bmg/m3BofBoil
<10BppmBCO
<1000BppmBCO2.
TLV,BPEL,BIDLHBforBcarbonBmonoxideB-BAnswerTLVBofB50BppmB(ACGIH);BSTELBofB400.
IDLHBofB1500BppmB(NIOSH)
PELBofB35-50B(OSHA);BceilingBisB200,BinstantaneousBisB1500.
CarbonBMonoxideB(CO)B-
BAnswerAirBpollutionBthatBisBaBproductBofBcombustionBofBfossilBfuels.BFlammable,Bcolo
, rless,Bodorless,Bpoisonous.BChemicalBasphyxiate.BDoesBNOTBharmBredBbloodBcells,BbutB
reducesBtheirBoxygen-carryingBcapacity.
TeratogenB-
BAnsweranBagentBorBfactorBthatBcausesBmalformationBofBanBembryoBorBfetus.BDoesBn
otBpropagateBacrossBgenerationalBlines.
NextBbestBoptionBtoBelectricBforkliftsBforBemissions.B-
BAnswerConvertBtheBforkliftBtoBLPBgas.
DoubleBinsulationBdoesBnotBprotectBagainstBshockBinBwhatBcircumstance?B-
BAnswerWater,BwetBlocations
(DataBterms)BRandom,Bstratified,Bsystematic,BclusterB-
BAnswerRandom:BeveryoneBhasBanBequalBchange.BStratified:BseparatedBbyBlayers.BSyste
matic:BpatternedBresponse.BCluster:BconfinedBtoBaBlocation.
pHBlessBthanB7B-BAnsweracid
pHBgreaterBthanB7B-BAnswerbase
activatedBcarbonB-
BAnswerABformBofBspeciallyBtreated,BporousBcarbon,BusedBtoBabsorbBvariousBodorsBan
dBvapors.BHasBaBnon-polarBsurface.
AxialBflowBfansB-
BAnswerHighBvolumeBandBlowBpressureBdrop;BgeneralB&BdilutionBventilation;BNOTBgoo
dBforBLEV;BNOTBusedBtoBmoveBairBthroughBaBduct;BsometimesBusedBforBcomfort.
CentrifugalBfansB-BAnswerFanBaxisBisBperpendicularBtoBflowB--
BspitsBairBoutB90Bdegrees.BLowBnoise.BSuitedBtoBhighBpressures.BLowBtoBmoderateBsta
ticBpressures;BusedBinBheatingB&BairBconditioning;BworkhorseBofBindustrialBhygiene;Bso
metimesBcalledBsquirrelBcages;BgoodBforBlint,BwoodBchipsB&Bdust.