CPFT Exam Review Questions and
Answers Updated 2026
Pneumotach-AflowA-
AAnswerAMeasuresAflowAandAconvertsAitAintoAvolume.ATurbineA(Wrights)-
AusesAvanesAwithAgears,AbreaksAeasily,AnotAforApeakAflow.
Fleish-AflowA-
AAnswerAPressureAdifferential.AFlowAgoesAinApastAresistanceAelement.APressureAdropAtran
slatesAtoAflow.AKinkedAgardenAhoseAeffect.
ThermalAelement-AflowA-
AAnswerACalculatesAflowAbyAcomparingAtemperatureAdifferentialAacrossAtwoAsensors.
PitotAtube-AflowA-AAnswerAFlowAcalculatedAacrossAseveralAtubeAsensors.
Ultrasonic-AflowA-
AAnswerAVortexAshedding,AultrasonicAscreenAvibratesAflow,AcreatingAvortices.AMachineAcou
ntsAvortices.
VolumeAdisplacementAwaterAseal-AvolumeA-AAnswerACollinsAwaterAseal
3ALAcalAsyringe-AvolumeA-AAnswerA2.9-3.10AL.AAcceptableAaccuracy
DryArollingAseal-AvolumeA-AAnswerAvolumeAspirometry
WedgeAbellows-AvolumeA-AAnswerAvolumeAspirometry
SineAwaveArotaryApump-volumeA-
AAnswerAmachineAsimulatesAvariedAflowAandAvolumeApatterns.A*BodyABoxAcalibration*
BodyABoxA-AAnswerAmeasuresAVtg,AwhichAisAsameAasAFRC.
AMoreAaccurateAforACOPD.A
Calibration:AmouthApressure=mercury,Awater.A
, BoxApressure=AsineAwaveArotaryApump.
TreadmillAcalibration-AexerciseA-AAnswerAbeltAlengthAxARPM.A
EK-A1AmillivoltA=A10mmAverticalAdeflectionAonApaper.
paperAspeedA25
LeadA2AmostAimportant
InductiveAPlethysmographA-AAnswerAchestAbands,A*sleepAstudy*
MetabolicAmeasurements-AmixingAchamberA-AAnswerAmetabolicAmeasurements.A
mixingAchamberA=AVO2A+AVCO2
inhaledAroomAair,AexhaledAgasesAcollectedAintoAchamber,AmixedAandAmeasured.
payAattentionAtoABTPS/STPD
*BTPSAisAalwaysAslightlyAhigher*
MVVA-AAnswerAbreathAxAvolumeAxA5A=AliterAperAmin
toAestimateApatientAeffortA=AFEVA1AxA35
IfAMVVAisAless=ApoorAeffort
staticAlungAvolumesA-AAnswerAincludesAFRCA+ARV
FRCAMeasurementAtypes-A-AAnswerAheliumAdilution
nitrogenAwashout
bodyAplethysmography
radiographicAestimation
heliumAdilutionA-
AAnswerArebreathingAthroughAclosedAsystemA(CO2A=Aissue),AscrubbersAneededA
initialAandAfinalAheliumAareAmeasured
differenceAinAvaluesAareAusedAtoAcalculateAFRC
endAofAtestAisAwhenAheliumAconcentrationAisAlessAthanA10%
Answers Updated 2026
Pneumotach-AflowA-
AAnswerAMeasuresAflowAandAconvertsAitAintoAvolume.ATurbineA(Wrights)-
AusesAvanesAwithAgears,AbreaksAeasily,AnotAforApeakAflow.
Fleish-AflowA-
AAnswerAPressureAdifferential.AFlowAgoesAinApastAresistanceAelement.APressureAdropAtran
slatesAtoAflow.AKinkedAgardenAhoseAeffect.
ThermalAelement-AflowA-
AAnswerACalculatesAflowAbyAcomparingAtemperatureAdifferentialAacrossAtwoAsensors.
PitotAtube-AflowA-AAnswerAFlowAcalculatedAacrossAseveralAtubeAsensors.
Ultrasonic-AflowA-
AAnswerAVortexAshedding,AultrasonicAscreenAvibratesAflow,AcreatingAvortices.AMachineAcou
ntsAvortices.
VolumeAdisplacementAwaterAseal-AvolumeA-AAnswerACollinsAwaterAseal
3ALAcalAsyringe-AvolumeA-AAnswerA2.9-3.10AL.AAcceptableAaccuracy
DryArollingAseal-AvolumeA-AAnswerAvolumeAspirometry
WedgeAbellows-AvolumeA-AAnswerAvolumeAspirometry
SineAwaveArotaryApump-volumeA-
AAnswerAmachineAsimulatesAvariedAflowAandAvolumeApatterns.A*BodyABoxAcalibration*
BodyABoxA-AAnswerAmeasuresAVtg,AwhichAisAsameAasAFRC.
AMoreAaccurateAforACOPD.A
Calibration:AmouthApressure=mercury,Awater.A
, BoxApressure=AsineAwaveArotaryApump.
TreadmillAcalibration-AexerciseA-AAnswerAbeltAlengthAxARPM.A
EK-A1AmillivoltA=A10mmAverticalAdeflectionAonApaper.
paperAspeedA25
LeadA2AmostAimportant
InductiveAPlethysmographA-AAnswerAchestAbands,A*sleepAstudy*
MetabolicAmeasurements-AmixingAchamberA-AAnswerAmetabolicAmeasurements.A
mixingAchamberA=AVO2A+AVCO2
inhaledAroomAair,AexhaledAgasesAcollectedAintoAchamber,AmixedAandAmeasured.
payAattentionAtoABTPS/STPD
*BTPSAisAalwaysAslightlyAhigher*
MVVA-AAnswerAbreathAxAvolumeAxA5A=AliterAperAmin
toAestimateApatientAeffortA=AFEVA1AxA35
IfAMVVAisAless=ApoorAeffort
staticAlungAvolumesA-AAnswerAincludesAFRCA+ARV
FRCAMeasurementAtypes-A-AAnswerAheliumAdilution
nitrogenAwashout
bodyAplethysmography
radiographicAestimation
heliumAdilutionA-
AAnswerArebreathingAthroughAclosedAsystemA(CO2A=Aissue),AscrubbersAneededA
initialAandAfinalAheliumAareAmeasured
differenceAinAvaluesAareAusedAtoAcalculateAFRC
endAofAtestAisAwhenAheliumAconcentrationAisAlessAthanA10%
