IRC TEST QUESTIONS WITH CORRECT
ANSWERS 2025
whatTisTtheTminimumTsizeTwasteTtrapTthatTcanTbeTusedTforTaTshower.T-TcorrectTanswer-1.5T(709.1)T(p.65)
theTminimumTrequiredTdiameterTofTstackTventsTandTventTstacksTofTaTsystemTwithTaTdevelopedTlengthTofT30
0TfeetTandTtotalTofT42TdrainageTfixtureTunitsTconnectedTthereto,TisT____________Tinch.T-TcorrectTanswer-
2.5T(906.1)T(p.75)
whatTisTtheTdrainageTfixtureTunitTvalveTforTaT1.5TinchTfixtureTdrain.T-TcorrectTanswer-2T(709.2)T(p.64)
temperedTwaterTshallTbeTdeliveredTfromTpublicThandTwashingTfacilitiesTthroughTanTapprovedTwaterT_____
_________TthatTconformsTtoTASSET1070TorTCSATB125.3.T-TcorrectTanswer-
temperatureTlimitingTdeviceT(416.5)T(p.32)
aTlowTpressureTcutoffTshallTbeTinstalledTonTallTboosterTpumpsTinTaTwaterTpressureTboosterTsystemTtoTpreve
ntTcreationTofTaTvacuumTorTnegativeTpressureTonTtheTsuctionTsideTofTtheTpumpTwhenTaTpositiveTpressureTof
T__________________TorTlessToccursTonTtheTsuctionTsideTofTtheTpump.T-TcorrectTanswer-
10TpsiT(68.94TkPa)T(606.5.5)T(p.48)
theTmaximumTallowableThorizontalThangerTspacingTforTbrassTpipeTisT______Tfeet.T-TcorrectTanswer-
10T(308.5)T(p.19)
inTaThealthTcareTfacility,TtheTvelocityTofTairflowTinTaTcentralTvacuumT(fluidTsuction)TsystemTshallTbeTlessTthan
T_________________T-TcorrectTanswer-5,000TfeetTperTminuteT(25Tm/s)T(713.7.2)T(p.68)
anyTcombinationTofTfixturesTwithinTtwoTbathroomTgroupsT_______________TisTpermittedTtoTbeTventedTbyT
aThorizontalTwetTvent.T-TcorrectTanswer-locatedTonTtheTsameTfloorTlevelT(912.1)T(p.73)
cleanoutsTshallTbeTinstalledTatTeachTchangeTofTdirectionTgreaterTthanT______________TinTtheTbuildingTsew
er,TbuildingTdrainTandThorizontalTwasteTorTsoilTlines.T-TcorrectTanswer-
45TdegreesT(0.79Trad)T(708.1.4)T(p.63)
ANSWERS 2025
whatTisTtheTminimumTsizeTwasteTtrapTthatTcanTbeTusedTforTaTshower.T-TcorrectTanswer-1.5T(709.1)T(p.65)
theTminimumTrequiredTdiameterTofTstackTventsTandTventTstacksTofTaTsystemTwithTaTdevelopedTlengthTofT30
0TfeetTandTtotalTofT42TdrainageTfixtureTunitsTconnectedTthereto,TisT____________Tinch.T-TcorrectTanswer-
2.5T(906.1)T(p.75)
whatTisTtheTdrainageTfixtureTunitTvalveTforTaT1.5TinchTfixtureTdrain.T-TcorrectTanswer-2T(709.2)T(p.64)
temperedTwaterTshallTbeTdeliveredTfromTpublicThandTwashingTfacilitiesTthroughTanTapprovedTwaterT_____
_________TthatTconformsTtoTASSET1070TorTCSATB125.3.T-TcorrectTanswer-
temperatureTlimitingTdeviceT(416.5)T(p.32)
aTlowTpressureTcutoffTshallTbeTinstalledTonTallTboosterTpumpsTinTaTwaterTpressureTboosterTsystemTtoTpreve
ntTcreationTofTaTvacuumTorTnegativeTpressureTonTtheTsuctionTsideTofTtheTpumpTwhenTaTpositiveTpressureTof
T__________________TorTlessToccursTonTtheTsuctionTsideTofTtheTpump.T-TcorrectTanswer-
10TpsiT(68.94TkPa)T(606.5.5)T(p.48)
theTmaximumTallowableThorizontalThangerTspacingTforTbrassTpipeTisT______Tfeet.T-TcorrectTanswer-
10T(308.5)T(p.19)
inTaThealthTcareTfacility,TtheTvelocityTofTairflowTinTaTcentralTvacuumT(fluidTsuction)TsystemTshallTbeTlessTthan
T_________________T-TcorrectTanswer-5,000TfeetTperTminuteT(25Tm/s)T(713.7.2)T(p.68)
anyTcombinationTofTfixturesTwithinTtwoTbathroomTgroupsT_______________TisTpermittedTtoTbeTventedTbyT
aThorizontalTwetTvent.T-TcorrectTanswer-locatedTonTtheTsameTfloorTlevelT(912.1)T(p.73)
cleanoutsTshallTbeTinstalledTatTeachTchangeTofTdirectionTgreaterTthanT______________TinTtheTbuildingTsew
er,TbuildingTdrainTandThorizontalTwasteTorTsoilTlines.T-TcorrectTanswer-
45TdegreesT(0.79Trad)T(708.1.4)T(p.63)
