GAS FITTER 2 PRACTICE TEST
QUESTION WITH COMPLETE
SOLUTIONS
A troom theater tinstalled tin teither ta tsleeping tarea tor tpublic tarea tshall tbe:
A. tdirect tvent tonly
B. tequipped twith ta tregulator
C. tequipped twith ta tfan
D. tequipped twith tan ton t/ toff tswitch ton tthe twall t- t✔✔B
What ttype tof tvent tmust tbe tused twhen tthe tvent tof ta twall tfurnace twill tbe tconcealed tin
ta tpartition twall?
A. tB tvent
B. tL tvent
C. tBH tvent
D. tBW tvent t- t✔✔D
Single twall tvent tconnectors:
A. tmay tpass tthrough tfloors, tceilings tor troofs tprovided ta tmetal tthimble tis tused
B. tmay tpass tthrough tfloors, tceilings tor troofs tprovided tthe trequired tminimum tdistance
tfrom tcombustible tmaterial tis tmaintained
C. tmay tpass tthrough tfloors, tceilings tor troofs tprovided tthey tare tinsulated
D. tshall tnot tpass tthrough tfloors, tceilings tor troofs t- t✔✔D
BW tvent tshall tbe tused tonly twith tan tapproved:
A. tdecorative tappliance
B. tdown tflow tfurnace
C. trevertible tflue tboiler
D. trecessed twall tfurnace t- t✔✔D
What tmust tbe tdone tduring tthe tinstallation tof ta tgas tlog tfireplace?
A. tMake tsure tthere tis ta tmetal tmesh tscreen tin tfront tof tthe tfireplace
B. tSecure tthe tchimney tdamper tin tthe topen tposition
C. tInstall ta tpressure tregulator
D. tInstall ta tmetal tchimney tliner t- t✔✔B
When tcan ta tcertified those tbe tused tto tconnect ta tconstruction theater tto ttemporary
tpiping?
,A. tOnly tif ta tlever thandle tshut toff tvalve tis tinstalled tupstream tof tthe those
B. tOnly tif tthe those tis t15 tfeet tlong
C. tNever t- t✔✔A
Which tof tthe tfollowing tis tacceptable twhen ta tfireplace tinsert tis tinstalled?
A. tA tmetal tchimney tlinear
B. tThe texisting tfireplace tflue
C. tBW tvent
D. tA ttile tlined tfireplace tflue? t- t✔✔A
An tunvented tinfra-red theater tcan tbe tinstalled tin t________ tapplication t
A. tA twarehouse
B. tA tcommercial tbuilding t
C. tAn tindustrial tbuilding
D. tAll tof tthe tabove t- t✔✔D
Dirt tpockets tare trequired ton:
A. tDecorative tappliances
B. tGas tlogs
C. tRoom theaters
D. tNone tof tthe tavailable tchoices t- t✔✔D
What tdiameter tand tlength tof ta tdirt tpocket tis trequired twhen ta tdrop tline tis t3-inch
tdiameter?
A. t3 tinch tdiameter tby t3 tinches tlong
B. t1 tinch tdiameter tby t3 tinches tlong
C. t3/4 tinch tdiameter tby t3 tinches tlong
D. t2 tinch tdiameter tby t3 tinches tlong t- t✔✔D
What ttype tof troom theater tmaybe tinstalled tin ta tbathroom?
A. tNatural tdraft
B. tDirect tfired
C. tForced tdraft
D. tDirect tvent t- t✔✔D
What tsafety tcontrol tprotects ta tsteam tboiler tif tthe tcondensate tpump tfails tto treturn
twater tto tthe tboiler?
A. tHigh tpressure tlimit tcontrol
B. tLow tpressure tlimit tcontrol
C. tFlame tsafeguard tcontrol
D. tLow twater tcut toff t- t✔✔D
The trelief tvalve tfor ta tresidential tlow-pressure thot twater tboiler tsystem tshould tbe?
A. t14.7 tpsia
B. t15 tpsia t
C. t30 tpsig
,D. t30 tpsia t- t✔✔C
A tbackflow tprevent tused tin ta tboiler tsystem tshould tbe tlocated tin tthe:
A. tOver tflow tline tconnected tto tthe tdrain
B. tReturn tline tclose tto tthe tboiler
C. t1/4" tline tconnecting tthe tboiler tand tcushion ttank
D. tMake tup twater tline tto tthe tsystem t- t✔✔B
Automatic tchlorinators tmust tbe tinstalled:
A. tupstream tof tthe theater
B. tdownstream tof tthe theater
C. tupstream tof tthe tfilter
D. tdownstream tof tthe tfilter t- t✔✔B
On tseasonal tstart tup, ta tpool theater tshould trun:
A. tintermittently
B. tcontinuously tfor t24 thours
C. tcontinuously tuntil tthe tthermostat tis tsatisfied
D. tone thour ton tand tone thour toff tuntil tthe tthermostat tis tsatisfied t- t✔✔C
Before tlighting ta tburner tin ta tsteam tboiler, tensure tthat:
A. tthere tis twater tin tthe tboiler
B. tthe ttemperature tcontroller tis tset tproperly
C. tthe tmain tburner ttest tfiring tvalve tis tturned ton
D. tthe tsafety tvalves tare topen t- t✔✔A
The trecommended twater ttemperature tsetting tfrom ta tmixing tvalve tto tthe tdomestic
twater tsystem tin tcombination theating tsystems tthat temploy toil-fired twater theaters tfor
theating tpotable twater tand tfor tspace theating tis:
A. t43°C t(110°F)
B. t49°C tto t54°C t(120°F tto t130°F)
C. t60°C tto t66°C t(140°F tto t150°F)
D. t83°C t(180°F) t- t✔✔B
An tinverted tsensor t(measures twater tlevel) tcan tbe tfound toperating twhat ttype tof
tappliance?
A. tHot twater tboiler
B. tSteam twater tboiler
C. tDomestic thot twater tstorage ttank
D. tDomestic tpotable thot twater ttank t- t✔✔D
A tbackflow tprevent tused tin ta thydronic theating tsystem tis tused tto:
A. tKeep thot twater tfrom tentering tthe tcold twater tsystem
B. tHold tthe tpressure ton tthe tsystem tduring ta ttemporary tshutdown tto tprevent tthe
tentry tof tair
C. tPrevent tthe theating twater tfrom tcirculating tthe twrong tway tin tthe tsystem
, D. tKeep tnon-combustible twater tfrom tentering tthe tdrinking twater tsystem t- t✔✔D
A tlow twater tcut toff tdevice ton tan tautomatically tfired thot twater theating tboiler trated tat
t350,000 tBtuh t(102 tkW) tis:
A. tNot trequired tif ta tlimit tcontrol tis tinstalled
B. tNot trequired tif tit tis tinstalled tin tthe tindustrial tapplication t
C. tRequired twhen tany tportion tof tthe tcirculating tsystem tis tlocated tbelow tthe tboiler
D. tRequired tonly tin tcommercial tapplications t- t✔✔C
A tpressure treducing tvalve t
A. tRelieves tsystem tpressure tin texcess tof tthe tset tpressure
B. tReduces tthe tcity tmain tpressure tto ta tsafe tworking tpressure
C. tReduces tthe tworking tpressure tto tthe tcity tmain tpressure
D. tPrevents thot twater tgravity tcirculation t- t✔✔B
The tmaximum toperating tpressure tof ta tlow tpressure tsteam tboiler tis
A. t5 tpsig t(35kPa)
B. t15 tpsig t(100 tkPa)
C. t100 tpsig t(690 tkPa)
D. t150 tpsig t(1035 tkPa) t- t✔✔B
A tscotch tmarine tboiler tis twhat ttype tof tboiler?
A. tTwo tpass tboiler
B. tCopper ttube tboiler
C. tFire ttube tboiler
D. tFour tpass twater ttube tboiler t- t✔✔C
A tfire ttube tboiler thas:
A. tWater toutside tthe ttube tand tflue tgases toutside
B. tWater tinside tthe ttubes tand tflue tgasses toutside
C. tWater tinside tthe ttubes tand twater toutside
D. tWater toutside tthe ttubes tand tflue tgases tinside t- t✔✔D
Why tis ta tpressure trelief tvalve tinstalled ton ta tpool theater tsystem?
A. tTo tmaintain tthe tpool twater tlevel
B. tTo tprevent tover tpressurizing tthe tfilter
C. tTo tprevent tdamage tto tthe tsystem
D. tTo trelieve texcess twater tpressure tcaused tby tsolar tgun t- t✔✔C
When tdoes tan telectrically toperated tautomatic tvent tdamper ton ta tmid-efficiency
tfurnace topen?
A. tBefore tthe tignition tcycle t
B. tWhen tthe tfurnace tis thot t
C. tAt tthe tsame ttime tas tthe tgas tcomes ton
D. tWhen tthe tmain tswitch tis tturned ton t- t✔✔A
QUESTION WITH COMPLETE
SOLUTIONS
A troom theater tinstalled tin teither ta tsleeping tarea tor tpublic tarea tshall tbe:
A. tdirect tvent tonly
B. tequipped twith ta tregulator
C. tequipped twith ta tfan
D. tequipped twith tan ton t/ toff tswitch ton tthe twall t- t✔✔B
What ttype tof tvent tmust tbe tused twhen tthe tvent tof ta twall tfurnace twill tbe tconcealed tin
ta tpartition twall?
A. tB tvent
B. tL tvent
C. tBH tvent
D. tBW tvent t- t✔✔D
Single twall tvent tconnectors:
A. tmay tpass tthrough tfloors, tceilings tor troofs tprovided ta tmetal tthimble tis tused
B. tmay tpass tthrough tfloors, tceilings tor troofs tprovided tthe trequired tminimum tdistance
tfrom tcombustible tmaterial tis tmaintained
C. tmay tpass tthrough tfloors, tceilings tor troofs tprovided tthey tare tinsulated
D. tshall tnot tpass tthrough tfloors, tceilings tor troofs t- t✔✔D
BW tvent tshall tbe tused tonly twith tan tapproved:
A. tdecorative tappliance
B. tdown tflow tfurnace
C. trevertible tflue tboiler
D. trecessed twall tfurnace t- t✔✔D
What tmust tbe tdone tduring tthe tinstallation tof ta tgas tlog tfireplace?
A. tMake tsure tthere tis ta tmetal tmesh tscreen tin tfront tof tthe tfireplace
B. tSecure tthe tchimney tdamper tin tthe topen tposition
C. tInstall ta tpressure tregulator
D. tInstall ta tmetal tchimney tliner t- t✔✔B
When tcan ta tcertified those tbe tused tto tconnect ta tconstruction theater tto ttemporary
tpiping?
,A. tOnly tif ta tlever thandle tshut toff tvalve tis tinstalled tupstream tof tthe those
B. tOnly tif tthe those tis t15 tfeet tlong
C. tNever t- t✔✔A
Which tof tthe tfollowing tis tacceptable twhen ta tfireplace tinsert tis tinstalled?
A. tA tmetal tchimney tlinear
B. tThe texisting tfireplace tflue
C. tBW tvent
D. tA ttile tlined tfireplace tflue? t- t✔✔A
An tunvented tinfra-red theater tcan tbe tinstalled tin t________ tapplication t
A. tA twarehouse
B. tA tcommercial tbuilding t
C. tAn tindustrial tbuilding
D. tAll tof tthe tabove t- t✔✔D
Dirt tpockets tare trequired ton:
A. tDecorative tappliances
B. tGas tlogs
C. tRoom theaters
D. tNone tof tthe tavailable tchoices t- t✔✔D
What tdiameter tand tlength tof ta tdirt tpocket tis trequired twhen ta tdrop tline tis t3-inch
tdiameter?
A. t3 tinch tdiameter tby t3 tinches tlong
B. t1 tinch tdiameter tby t3 tinches tlong
C. t3/4 tinch tdiameter tby t3 tinches tlong
D. t2 tinch tdiameter tby t3 tinches tlong t- t✔✔D
What ttype tof troom theater tmaybe tinstalled tin ta tbathroom?
A. tNatural tdraft
B. tDirect tfired
C. tForced tdraft
D. tDirect tvent t- t✔✔D
What tsafety tcontrol tprotects ta tsteam tboiler tif tthe tcondensate tpump tfails tto treturn
twater tto tthe tboiler?
A. tHigh tpressure tlimit tcontrol
B. tLow tpressure tlimit tcontrol
C. tFlame tsafeguard tcontrol
D. tLow twater tcut toff t- t✔✔D
The trelief tvalve tfor ta tresidential tlow-pressure thot twater tboiler tsystem tshould tbe?
A. t14.7 tpsia
B. t15 tpsia t
C. t30 tpsig
,D. t30 tpsia t- t✔✔C
A tbackflow tprevent tused tin ta tboiler tsystem tshould tbe tlocated tin tthe:
A. tOver tflow tline tconnected tto tthe tdrain
B. tReturn tline tclose tto tthe tboiler
C. t1/4" tline tconnecting tthe tboiler tand tcushion ttank
D. tMake tup twater tline tto tthe tsystem t- t✔✔B
Automatic tchlorinators tmust tbe tinstalled:
A. tupstream tof tthe theater
B. tdownstream tof tthe theater
C. tupstream tof tthe tfilter
D. tdownstream tof tthe tfilter t- t✔✔B
On tseasonal tstart tup, ta tpool theater tshould trun:
A. tintermittently
B. tcontinuously tfor t24 thours
C. tcontinuously tuntil tthe tthermostat tis tsatisfied
D. tone thour ton tand tone thour toff tuntil tthe tthermostat tis tsatisfied t- t✔✔C
Before tlighting ta tburner tin ta tsteam tboiler, tensure tthat:
A. tthere tis twater tin tthe tboiler
B. tthe ttemperature tcontroller tis tset tproperly
C. tthe tmain tburner ttest tfiring tvalve tis tturned ton
D. tthe tsafety tvalves tare topen t- t✔✔A
The trecommended twater ttemperature tsetting tfrom ta tmixing tvalve tto tthe tdomestic
twater tsystem tin tcombination theating tsystems tthat temploy toil-fired twater theaters tfor
theating tpotable twater tand tfor tspace theating tis:
A. t43°C t(110°F)
B. t49°C tto t54°C t(120°F tto t130°F)
C. t60°C tto t66°C t(140°F tto t150°F)
D. t83°C t(180°F) t- t✔✔B
An tinverted tsensor t(measures twater tlevel) tcan tbe tfound toperating twhat ttype tof
tappliance?
A. tHot twater tboiler
B. tSteam twater tboiler
C. tDomestic thot twater tstorage ttank
D. tDomestic tpotable thot twater ttank t- t✔✔D
A tbackflow tprevent tused tin ta thydronic theating tsystem tis tused tto:
A. tKeep thot twater tfrom tentering tthe tcold twater tsystem
B. tHold tthe tpressure ton tthe tsystem tduring ta ttemporary tshutdown tto tprevent tthe
tentry tof tair
C. tPrevent tthe theating twater tfrom tcirculating tthe twrong tway tin tthe tsystem
, D. tKeep tnon-combustible twater tfrom tentering tthe tdrinking twater tsystem t- t✔✔D
A tlow twater tcut toff tdevice ton tan tautomatically tfired thot twater theating tboiler trated tat
t350,000 tBtuh t(102 tkW) tis:
A. tNot trequired tif ta tlimit tcontrol tis tinstalled
B. tNot trequired tif tit tis tinstalled tin tthe tindustrial tapplication t
C. tRequired twhen tany tportion tof tthe tcirculating tsystem tis tlocated tbelow tthe tboiler
D. tRequired tonly tin tcommercial tapplications t- t✔✔C
A tpressure treducing tvalve t
A. tRelieves tsystem tpressure tin texcess tof tthe tset tpressure
B. tReduces tthe tcity tmain tpressure tto ta tsafe tworking tpressure
C. tReduces tthe tworking tpressure tto tthe tcity tmain tpressure
D. tPrevents thot twater tgravity tcirculation t- t✔✔B
The tmaximum toperating tpressure tof ta tlow tpressure tsteam tboiler tis
A. t5 tpsig t(35kPa)
B. t15 tpsig t(100 tkPa)
C. t100 tpsig t(690 tkPa)
D. t150 tpsig t(1035 tkPa) t- t✔✔B
A tscotch tmarine tboiler tis twhat ttype tof tboiler?
A. tTwo tpass tboiler
B. tCopper ttube tboiler
C. tFire ttube tboiler
D. tFour tpass twater ttube tboiler t- t✔✔C
A tfire ttube tboiler thas:
A. tWater toutside tthe ttube tand tflue tgases toutside
B. tWater tinside tthe ttubes tand tflue tgasses toutside
C. tWater tinside tthe ttubes tand twater toutside
D. tWater toutside tthe ttubes tand tflue tgases tinside t- t✔✔D
Why tis ta tpressure trelief tvalve tinstalled ton ta tpool theater tsystem?
A. tTo tmaintain tthe tpool twater tlevel
B. tTo tprevent tover tpressurizing tthe tfilter
C. tTo tprevent tdamage tto tthe tsystem
D. tTo trelieve texcess twater tpressure tcaused tby tsolar tgun t- t✔✔C
When tdoes tan telectrically toperated tautomatic tvent tdamper ton ta tmid-efficiency
tfurnace topen?
A. tBefore tthe tignition tcycle t
B. tWhen tthe tfurnace tis thot t
C. tAt tthe tsame ttime tas tthe tgas tcomes ton
D. tWhen tthe tmain tswitch tis tturned ton t- t✔✔A
