MEDICAL GAS NFPA 99 2026 TEST
QUESTIONS AND CORRECT
ANSWERS 100%VERIFIED
UPDATED 2026\2027
Whenrtherinitialrpressurertestrconducted,rbyrarmedicalrgasrinstaller,ronrarnitrousroxidersystem?
A)rafterrblowdownrofrardistributionrpiping
B)rafterrinstallationrofralarmrsensors
C)rbeforerblowrdownrofrdistributionrpiping
D)rbeforerinstallationrofrstationrrough-inrassembliesr-rCORRECTrANSWER-
A)rafterrblowdownrofrardistributionrpiping
Inrthoserportionsrofrsystemsrintendedrtorhandleroxygenratrpressuresrgreaterrthanr350rpsi,rtherinterconnect
ingrhosershallrNOTrcontainr__________rmaterials
A)rbrass
B)rcopper
C)rpolymeric
D)rstainlessrsteelr-rCORRECTrANSWER-C)rpolymeric
Inrcategoryr1rdentalrandrgasrvacuumrpipingrsystem,rwhichrofrtherfollowingrisranrNFPAr99rrequirementrforrth
erlabelingrofrpipes?
A)rcolorrcoding
B)rfixedrlabelrwidth
C)rlabelrshallrwraprcompletelyraroundrtherpipe
D)rreflectiverlabelr-rCORRECTrANSWER-A)rcolorrcoding
, Referrtordiagramr#1ridentifyr#5
A)rin-linervalve
B)rmainrcontrolrvalve
C)rservicervalve
D)rzonervalver-rCORRECTrANSWER-A)rin-linervalve
Referrtordiagramr#1ridentifyr#6
A)ralarmrsensor
B)rfuturervalve
C)rhistoryrvalve
D)rservicervalver-rCORRECTrANSWER-D)rservicervalve
Whichrofrtherfollowingrtreatmentsrshallrberpreformedrbeforerbrazingrcutrendsrofrartubertorberinstalledrinrar
medicalrgasrpipingrsystem?
A)rAnrargonrpurgershallrberpreformed
B)rcutrendsrshallrberrolledrsmoothrorrdeburred
C)rextensionsrshallrberaddedrforrbrazing
D)rtreatmentrisrNOTrrequiredr,rtheyrmayrberbrazedr"asris"r-rCORRECTrANSWER-
B)rcutrendsrshallrberrolledrsmoothrorrdeburred
Manifoldsrforrgasrcylindersrshallractuatera(n)r______rsignalrandrshallractivateranrindicatorratrallr_______rala
rmrpanelsrtorindicaterwhenrorrjustrbeforerchangeoverrfromronerheaderrtortherother
A)rarea,rmaster
B)rlocal,rmaster
C)rmaster,rarea
D)rmaster,rlocalr-rCORRECTrANSWER-B)rlocal,rmaster
QUESTIONS AND CORRECT
ANSWERS 100%VERIFIED
UPDATED 2026\2027
Whenrtherinitialrpressurertestrconducted,rbyrarmedicalrgasrinstaller,ronrarnitrousroxidersystem?
A)rafterrblowdownrofrardistributionrpiping
B)rafterrinstallationrofralarmrsensors
C)rbeforerblowrdownrofrdistributionrpiping
D)rbeforerinstallationrofrstationrrough-inrassembliesr-rCORRECTrANSWER-
A)rafterrblowdownrofrardistributionrpiping
Inrthoserportionsrofrsystemsrintendedrtorhandleroxygenratrpressuresrgreaterrthanr350rpsi,rtherinterconnect
ingrhosershallrNOTrcontainr__________rmaterials
A)rbrass
B)rcopper
C)rpolymeric
D)rstainlessrsteelr-rCORRECTrANSWER-C)rpolymeric
Inrcategoryr1rdentalrandrgasrvacuumrpipingrsystem,rwhichrofrtherfollowingrisranrNFPAr99rrequirementrforrth
erlabelingrofrpipes?
A)rcolorrcoding
B)rfixedrlabelrwidth
C)rlabelrshallrwraprcompletelyraroundrtherpipe
D)rreflectiverlabelr-rCORRECTrANSWER-A)rcolorrcoding
, Referrtordiagramr#1ridentifyr#5
A)rin-linervalve
B)rmainrcontrolrvalve
C)rservicervalve
D)rzonervalver-rCORRECTrANSWER-A)rin-linervalve
Referrtordiagramr#1ridentifyr#6
A)ralarmrsensor
B)rfuturervalve
C)rhistoryrvalve
D)rservicervalver-rCORRECTrANSWER-D)rservicervalve
Whichrofrtherfollowingrtreatmentsrshallrberpreformedrbeforerbrazingrcutrendsrofrartubertorberinstalledrinrar
medicalrgasrpipingrsystem?
A)rAnrargonrpurgershallrberpreformed
B)rcutrendsrshallrberrolledrsmoothrorrdeburred
C)rextensionsrshallrberaddedrforrbrazing
D)rtreatmentrisrNOTrrequiredr,rtheyrmayrberbrazedr"asris"r-rCORRECTrANSWER-
B)rcutrendsrshallrberrolledrsmoothrorrdeburred
Manifoldsrforrgasrcylindersrshallractuatera(n)r______rsignalrandrshallractivateranrindicatorratrallr_______rala
rmrpanelsrtorindicaterwhenrorrjustrbeforerchangeoverrfromronerheaderrtortherother
A)rarea,rmaster
B)rlocal,rmaster
C)rmaster,rarea
D)rmaster,rlocalr-rCORRECTrANSWER-B)rlocal,rmaster
