HVAC G2 EXAM REVIEW QUESTIONS
WITH CORRECT ANSWERS 2025
ToYdetermineYtheYlowestYairYpressure,YwhereYwouldYyouYtakeYaYmeasurementYinYtheYductworkYofYaYforcedY
airYheatingYsystem?Y-YCORRECTYANSWERY-upstreamYofYtheYcirculatingYblower
AnYexhaustYpipeYshallYdischarge?Y-YCORRECTYANSWERY-ToYtheYoutdoors/notYinYtheYhouse
AYfurnaceYisYfoundYoffYonYhighYlimit,YwhatYisYtheYmostYlikelyYcause?Y-YCORRECTYANSWERY-returnYairYtooYlow
TheYmaximumYpressureYlossYbetweenYtheYterminationYofYtheYutilityYinstallationYandYanYapplianceYforYaYpipi
ngYsystemYwithYsupplyYpressureYinYexcessYofY14"Yw.cYshallYnotYexceedY-YCORRECTYANSWERY-10Ypercent
AYhotYsurfaceYignitorYrequiresYhowYmanyYvoltsYtoYoperateYproperly?Y-YCORRECTYANSWERY-80-125YVAC
AYladderYorYschematicYdiagramYindicate?Y-YCORRECTYANSWERY-howYtheYsystemYworks
OnYanYelectricalYschematicYorYladderYdiagramYtheYoperatingYcontrolYisYdrawnY-YCORRECTYANSWERY-
normallyYopen
OnYanYelectricalYschematicYorYladderYdiagramYtheYsystemYisYshownYwithYtheY-YCORRECTYANSWERY-
disconnectYopenYandYallYdevicesYatYrestY(noYcallYforYheating)
whichYinstrumentYdeterminesYpolarityYandYpotentialYdifference?Y-YCORRECTYANSWERY-voltmeter
ifYtheYvoltageYhasYbeenYdeterminedYtoYbeY120YvoltsYwhichYscaleYwouldYyouYselectYonYanYanalogYmeterYforY
mostYaccuracy?Y-YCORRECTYANSWERY-0-240Yvolts
WITH CORRECT ANSWERS 2025
ToYdetermineYtheYlowestYairYpressure,YwhereYwouldYyouYtakeYaYmeasurementYinYtheYductworkYofYaYforcedY
airYheatingYsystem?Y-YCORRECTYANSWERY-upstreamYofYtheYcirculatingYblower
AnYexhaustYpipeYshallYdischarge?Y-YCORRECTYANSWERY-ToYtheYoutdoors/notYinYtheYhouse
AYfurnaceYisYfoundYoffYonYhighYlimit,YwhatYisYtheYmostYlikelyYcause?Y-YCORRECTYANSWERY-returnYairYtooYlow
TheYmaximumYpressureYlossYbetweenYtheYterminationYofYtheYutilityYinstallationYandYanYapplianceYforYaYpipi
ngYsystemYwithYsupplyYpressureYinYexcessYofY14"Yw.cYshallYnotYexceedY-YCORRECTYANSWERY-10Ypercent
AYhotYsurfaceYignitorYrequiresYhowYmanyYvoltsYtoYoperateYproperly?Y-YCORRECTYANSWERY-80-125YVAC
AYladderYorYschematicYdiagramYindicate?Y-YCORRECTYANSWERY-howYtheYsystemYworks
OnYanYelectricalYschematicYorYladderYdiagramYtheYoperatingYcontrolYisYdrawnY-YCORRECTYANSWERY-
normallyYopen
OnYanYelectricalYschematicYorYladderYdiagramYtheYsystemYisYshownYwithYtheY-YCORRECTYANSWERY-
disconnectYopenYandYallYdevicesYatYrestY(noYcallYforYheating)
whichYinstrumentYdeterminesYpolarityYandYpotentialYdifference?Y-YCORRECTYANSWERY-voltmeter
ifYtheYvoltageYhasYbeenYdeterminedYtoYbeY120YvoltsYwhichYscaleYwouldYyouYselectYonYanYanalogYmeterYforY
mostYaccuracy?Y-YCORRECTYANSWERY-0-240Yvolts