NFPA-99: PRACTICE TEST QUESTIONS AND
CORRECT ANSWERS 100% VERIFIED
UPDATED 2026/2027
D)gthegroomgisgsecuredgwithglockablegdoors.g-gCORRECTgANSWER-C)gThegonlygmotor-
drivengmachinerygingthegroomgisgforgtheginstrumentgairgequipment
Risergvalvesgaregthosegvalvesglocatedgwhere?
A)gadjacentgtogthegmaingrisergdownstreamgofganygzonegvalve.
B)ganywheregingtheglateralgbranchesgofgthegpipinggsystem.
C)gingthegmainlinegadjacentgtogthegbasegofgthegriser.
D)gingthegrisergadjacentgtogthegmainline.g-gCORRECTgANSWER-D)gIngthegrisergadjacentgtogthegmaingline
Whengisgtheginitialgpressuregtestgconductedgbygtheginstaller?
A)gaftergblowdowngofgthegdistributiongpiping.
B)gafterginstallationgofgalarmgsensors.
C)gbeforegblowdowngofgdistributiongpiping.
D)gbeforeginstallationgofgstationgroughgingassembly.g-gCORRECTgANSWER-A)gAftergblow-
downgofgthegdistributiongpiping.
Ingthosegportionsgofgsystemsgintendedgtoghandlegoxygengatgpressureggreatergthang350gpsigthegintergconnec
tingghosegshallgnotgcontaingwhatgmaterials?
A)gbrass.
B)gcopper
C)gpolymeric
D)gstainlessgsteelg-gCORRECTgANSWER-C)gPolymeric
Thegtoolgshowngheregallowsgtheginstallergtogmechanicallyglimitgthegmakeupgdepthgofgthegfittinggtogbegbraze
d.gUndergwhatgconditiongisgthisgmethodgpermittedgforgtheginstallationgofgmedicalggasgpiping?
A)gonlygongfinalglinegconnectors.
,B)gonlygongvacuumgsystems.
C)gwheregonlygBgcupg5gbrazinggrodgisgused
D)gwheregtheglimitedgmakeupgdepthgisgnotglessgthangminimumgcutgdepthghergANSIg/gASMEgrecommendati
onsg-gCORRECTgANSWER-
D)gWheregtheglimitedgmakeupgdepthgisgnotglessgthangminimumgcupgdepthgcurrentgANSI\ASMEgrecommen
dation
Whatgisgthegstandardggaugegpressuregforgnitrogenggasgservice?
A)g15g-g30
B)g50g-g55
C)g162g185
D)gitgvariesgwithgsystemgtype.g-gCORRECTgANSWER-C)g50g-g55gpsi
WhatgisgagNFPAg99grequirementgforglabelinggofgpipesgingmedicalggasgsystem?
A)gcolorgcoding
B)gfixedglabelgwith
C)glabelgshallgwrapgcompletelygaroundgpipe.
D)greflectiveglabelg-gCORRECTgANSWER-A)gColorgcoding
Agwirelessgcommunicationgdevicegisgemployedgingagmedicalggasgorgvacuumgwarninggsystem.gwhatgtypegofgs
upervisiongisgrequiredgforgthisgdevice?
A)gagvisualgindicatorgShelbyglocatedgingmaintenancegofficergorgengineeringgdepartment.
B)gthisgdevicegshallgbeginstalledgatgthegmedicalggasgorgvacuumgsource.
C)gthisgdevicegshallgbeglocatedgatgnursesgstation.
D)gthisgdevicegwillgbegsupervisedgsuchgthatgfailuregcommunicationgshallginitiategangalarm.g-
gCORRECTgANSWER-
D)gThisgdevicegwillgbegsupervisedgsuchgthatgfailuregofgcommunicationgshallginitategangalarm
IngagfacilitygwheregMedicalgGasgvacuumgsystemsgaregpresentgandgthegfailuregofgsuchgequipmentgorgsystem
sgisglikelygtogcauseganygmajorginjurygorgdeathgtogpatientsgorgcaregiversgthisgsystemgshallgbegdesignedgtogme
etgwhichgcategorygrequirements?
A)g1
, B)g2
C)g3
D)g4g-gCORRECTgANSWER-A)gcategoryg1
Agfacultygisgingthegplanninggstagesgofginstallinggangemergencygoxygengservicegconnectiong(ESOC).gHowgman
ygfeetgisgthegminimumgamountgofgclearancegrequiredgaroundgthisgconnection?
A)g1gfoot
B)g3gfeet
C)g5gfeet
D)gClearancegmustgbeg1-1/2gtimesgthegwidthgofgthegauxiliary.g-gCORRECTgANSWER-B)g3gfeet
Woodengrackgforgcylindergstoragegmaygbegpermittedgundergwhichgconditions?
A)gthegwoodengmustgbegpainted.
B)gtheygaregpermittedgwithgnogsetgconditionsg.
C)gtheygmustgbeglocatedgingangareagwithgfiregsuppressiongsystem.
D)gWoodengracksgaregnoglongergpermittedg-gCORRECTgANSWER-D)gWoodengracksgaregnoglongergpermitted
Ifgnonmetallicgflexiblegconnectorsgisgbeinggusedgingagcategoryg1ghealthcaregfacultygtogconnectgtogthegmanif
oldgtogtheggasgdistributiongpipinggwhatgisgthegmaximumglengthgpermittedgforgthegflexiblegconnectors?
A)g2.5gfeet
B)g5gfeet
C)gTheygshallgbegnoglongergnecessary
D)gthegusegofgflexiblegconnectorsgisgnotgpermitted.g-gCORRECTgANSWER-
C)gTheygshallgbegnoglongergnecessary
Whatgtypegofgcoppergtubeghangergshallgbegusedgforgpotentiallygdampglocations?
A)gcarbongsteel
B)gcoppergcoated
C)gPlasticgcoatedgorginsulatedgwithgmaterialgthatgwillgbegnon-absorbentgor
CORRECT ANSWERS 100% VERIFIED
UPDATED 2026/2027
D)gthegroomgisgsecuredgwithglockablegdoors.g-gCORRECTgANSWER-C)gThegonlygmotor-
drivengmachinerygingthegroomgisgforgtheginstrumentgairgequipment
Risergvalvesgaregthosegvalvesglocatedgwhere?
A)gadjacentgtogthegmaingrisergdownstreamgofganygzonegvalve.
B)ganywheregingtheglateralgbranchesgofgthegpipinggsystem.
C)gingthegmainlinegadjacentgtogthegbasegofgthegriser.
D)gingthegrisergadjacentgtogthegmainline.g-gCORRECTgANSWER-D)gIngthegrisergadjacentgtogthegmaingline
Whengisgtheginitialgpressuregtestgconductedgbygtheginstaller?
A)gaftergblowdowngofgthegdistributiongpiping.
B)gafterginstallationgofgalarmgsensors.
C)gbeforegblowdowngofgdistributiongpiping.
D)gbeforeginstallationgofgstationgroughgingassembly.g-gCORRECTgANSWER-A)gAftergblow-
downgofgthegdistributiongpiping.
Ingthosegportionsgofgsystemsgintendedgtoghandlegoxygengatgpressureggreatergthang350gpsigthegintergconnec
tingghosegshallgnotgcontaingwhatgmaterials?
A)gbrass.
B)gcopper
C)gpolymeric
D)gstainlessgsteelg-gCORRECTgANSWER-C)gPolymeric
Thegtoolgshowngheregallowsgtheginstallergtogmechanicallyglimitgthegmakeupgdepthgofgthegfittinggtogbegbraze
d.gUndergwhatgconditiongisgthisgmethodgpermittedgforgtheginstallationgofgmedicalggasgpiping?
A)gonlygongfinalglinegconnectors.
,B)gonlygongvacuumgsystems.
C)gwheregonlygBgcupg5gbrazinggrodgisgused
D)gwheregtheglimitedgmakeupgdepthgisgnotglessgthangminimumgcutgdepthghergANSIg/gASMEgrecommendati
onsg-gCORRECTgANSWER-
D)gWheregtheglimitedgmakeupgdepthgisgnotglessgthangminimumgcupgdepthgcurrentgANSI\ASMEgrecommen
dation
Whatgisgthegstandardggaugegpressuregforgnitrogenggasgservice?
A)g15g-g30
B)g50g-g55
C)g162g185
D)gitgvariesgwithgsystemgtype.g-gCORRECTgANSWER-C)g50g-g55gpsi
WhatgisgagNFPAg99grequirementgforglabelinggofgpipesgingmedicalggasgsystem?
A)gcolorgcoding
B)gfixedglabelgwith
C)glabelgshallgwrapgcompletelygaroundgpipe.
D)greflectiveglabelg-gCORRECTgANSWER-A)gColorgcoding
Agwirelessgcommunicationgdevicegisgemployedgingagmedicalggasgorgvacuumgwarninggsystem.gwhatgtypegofgs
upervisiongisgrequiredgforgthisgdevice?
A)gagvisualgindicatorgShelbyglocatedgingmaintenancegofficergorgengineeringgdepartment.
B)gthisgdevicegshallgbeginstalledgatgthegmedicalggasgorgvacuumgsource.
C)gthisgdevicegshallgbeglocatedgatgnursesgstation.
D)gthisgdevicegwillgbegsupervisedgsuchgthatgfailuregcommunicationgshallginitiategangalarm.g-
gCORRECTgANSWER-
D)gThisgdevicegwillgbegsupervisedgsuchgthatgfailuregofgcommunicationgshallginitategangalarm
IngagfacilitygwheregMedicalgGasgvacuumgsystemsgaregpresentgandgthegfailuregofgsuchgequipmentgorgsystem
sgisglikelygtogcauseganygmajorginjurygorgdeathgtogpatientsgorgcaregiversgthisgsystemgshallgbegdesignedgtogme
etgwhichgcategorygrequirements?
A)g1
, B)g2
C)g3
D)g4g-gCORRECTgANSWER-A)gcategoryg1
Agfacultygisgingthegplanninggstagesgofginstallinggangemergencygoxygengservicegconnectiong(ESOC).gHowgman
ygfeetgisgthegminimumgamountgofgclearancegrequiredgaroundgthisgconnection?
A)g1gfoot
B)g3gfeet
C)g5gfeet
D)gClearancegmustgbeg1-1/2gtimesgthegwidthgofgthegauxiliary.g-gCORRECTgANSWER-B)g3gfeet
Woodengrackgforgcylindergstoragegmaygbegpermittedgundergwhichgconditions?
A)gthegwoodengmustgbegpainted.
B)gtheygaregpermittedgwithgnogsetgconditionsg.
C)gtheygmustgbeglocatedgingangareagwithgfiregsuppressiongsystem.
D)gWoodengracksgaregnoglongergpermittedg-gCORRECTgANSWER-D)gWoodengracksgaregnoglongergpermitted
Ifgnonmetallicgflexiblegconnectorsgisgbeinggusedgingagcategoryg1ghealthcaregfacultygtogconnectgtogthegmanif
oldgtogtheggasgdistributiongpipinggwhatgisgthegmaximumglengthgpermittedgforgthegflexiblegconnectors?
A)g2.5gfeet
B)g5gfeet
C)gTheygshallgbegnoglongergnecessary
D)gthegusegofgflexiblegconnectorsgisgnotgpermitted.g-gCORRECTgANSWER-
C)gTheygshallgbegnoglongergnecessary
Whatgtypegofgcoppergtubeghangergshallgbegusedgforgpotentiallygdampglocations?
A)gcarbongsteel
B)gcoppergcoated
C)gPlasticgcoatedgorginsulatedgwithgmaterialgthatgwillgbegnon-absorbentgor
