PLUMBING EXAM QUESTIONS AND
ANSWERS
A fjourneyman fplumber fand fan fapprentice, fwho fare femployed fby fa fmaster fplumber,
fare finstalling fthe fDWV-system fand fwater fdistribution fsystem fin fa f2-½ fstory fsingle
ffamily fdwelling. fQUESTION: fWhat fanswer fbelow fshall fbe fconsidered fmost fcorrect fto
fcomplete fthe ffollowing f"Plumbing fcode fknowledge" frelated fstatement: fA ftrap fthat
fserves fa fsingle fshower fstall fthat fis fequipped fwith fa fhand fshower, fa frain fhead, fand fa
fstandard fshower fhead fshall fbe fno fless fthan f________ fin fminimum fdiameter
A) f1-½" fB) f2" fC) f2-½" fD) f3" f- f✔✔2 finches
A fjourneyman fplumber fand fapprentice fare finstalling f3-inch ffloor fdrains fin fan fopen-
parking-garage fthat fis fsubject fto ffreezing ftemperatures. fQUESTION: fWhat fanswer
fbelow fshall fbe fconsidered fmost fcorrect fto fcomplete fthe ffollowing f"Plumbing fcode
fknowledge" frelated fstatement: fThe finstallation fof ftraps fat fthe ffloor fdrain flocations
fwhich fare ffound fsusceptible fto ffreezing ftemperatures fmay fbe f__________.
A)Increased fto f4-inch fB) fEliminated fC) fWrapped fwith ffreeze fprotection fcable fD)
fInsulated f- f✔✔eliminated
A fjourneyman fplumber fand fapprentice fare finstalling flab fsinks fwith ffaucets fthat fare
fconnected fto fan facid fwaste fsystem ffor-(special fhazardous fwaste) fin fa fmedical flab.
fWhat fanswer fbelow fshall fbe fconsidered fmost fcorrect fto fcomplete fthe ffollowing
f"Plumbing fcode fknowledge" frelated fstatement: fVacuum fbreakers fshall fbe finstalled
fwith fthe fcritical flevel fat fleast f_____-inches fabove fthe fflood flevel frim fof fthe ffixture
fthey fserve fand fon fthe fdischarge fside fof fthe flast fcontrol fvalve fto fthe ffixture.
A) f12 fB) f6 fC) f18 fD) f3 f- f✔✔6 finches
What fanswer fbelow fshall fbe fconsidered fmost fcorrect fto fcomplete fthe ffollowing
f"Plumbing fcode fknowledge" frelated fstatement: fNo fplumbing fpermit fshall fbe fissued
ffor fcross fconnection finstallations fthat frequire f______________ funtil fthe fapplication
ffor fa fpermit fis faccompanied fby fa fletter fof fapproval ffrom fthe fMassachusetts
fDepartment fof fEnvironmental fProtection for fits fdesignee.
A) fRPBP fB) fA f"critical flevel" fheight fC) fAtmospheric fvacuum fbreakers fD) fWater
frecycling fsystems f- f✔✔reduced fpressure fbackflow fpreventer f(RPBP)
: fWhat fanswer fbelow fshall fbe fconsidered fmost fcorrect fto fcomplete fthe ffollowing
f"Plumbing fcode fknowledge" frelated fstatement: fThe fwaste fdischarge ffrom fsafe fwaste
,fpans fserving fwater fheaters for fhot fwater fstorage ftanks fwhere fthere fis f_______ fbelow
fand fshall fbe fpiped findirectly fto fa fproperly ftrapped fand fvented ffixture.
A) fPeople fB) fOccupancy fC) fFloors fD) fPlumbing fconnections f- f✔✔occupancy
GIVEN: fA fjourneyman fplumber fand fan fapprentice, f(who fare femployed fby fa fmaster
fplumber), fare finstalling fthe fsanitary fDWV fand fwater fdistribution fsystem fin fa ffive-story
fresidential fcondominium fcomplex. fQUESTION: fWhat fanswer fbelow fshall fbe
fconsidered fmost fcorrect fto fcomplete fthe ffollowing f"Plumbing fcode fknowledge"
frelated fstatement: fCPVC-(Chlorinated fPolyvinyl fChloride) fpipe fand ffittings fmay fbe
fused fprovided fthat fnone fof fthis fmaterial fis flocated fwithin f____-inches fof fany
fconnection fto fa fhot fwater ftank fas fdefined fin fMGL. fc. f142, f§ f17
A) f12 fB) f18 fC) f20 fD) f24 fE) f30 f- f✔✔24 finches
: fA fjourneyman fplumber fand fapprentice fare froughing-in fmultiple ffixtures fin fa fnew
ffitness fcenter. fThe ffacility fwill finclude fa fjuice fbar, ftemporary fdaycare froom, fmen's
fand fwomen's ftoilet ffacilities fand fmen's fand fwomen's flocker frooms. fQUESTION: fWhat
fanswer fbelow fshall fbe fconsidered fmost fcorrect fto fcomplete fthe ffollowing f"Plumbing
fcode fknowledge" frelated fstatement: fA f________-vent fis fa fbranch fvent fthat fserves
ftwo for fmore ffloor-outlet ffixtures fthat fare fbattery fwasted. fThe fvent fextends ffrom fthe
ftop fof fthe fhorizontal fsoil fand/or fwaste fbranch fin ffront fof fthe flast ffixture fwaste fand
fconnects fto fa fvent fstack for fstack fvent fthat fis fadjacent fto fthe fdown-stream fend fof fthe
fhorizontal fbranch.
A) fSide fB) fLoop fC) fRelief fD) fCircuit f- f✔✔loop
MATCH: f
Elevated fpressure f
Flow fdesignation f
Ten fP.S.I.G. for fless
fLess fthan f2-P.S.I f
A) f3 fP.S.I.G. for ften ftimes
B) fInlet fpressure f
fC) fE.H.D.
D) fProf. fEngineer f- f✔✔elevated fpressure- fd
flow fdesignation-c
Ten fP.S.I.G. for fless-a
Less fthan f2-P.S.I-b
N: fA fjourneyman fplumber fis finstalling fcategory-I fgas fappliances fand fequipment fin fthe
fbasement fof fa fbuilding. fA f120,000 fBTU/hr. fboiler fand f40,000 fBTU/hr. fwater fheater
fare fbeing finstalled. fQUESTION: fWhat fanswer fbelow fshall fbe fconsidered fmost
fcorrect fto fcomplete fthe ffollowing f"Gas fcode fknowledge" frelated fstatement: fThe fboiler
frequires fa fminimum fof f_____-cu. fft. fof fair fto fsupport fproper fcombustion
, A) f2,400 fcu. fft. fB) f120 fsq. fin. fC) f3,200 fsq. fft. fD) f800 fcu. fft. f- f✔✔2,400 fcu. fft.
f120,000/50
) fQUESTION: fWhat fanswer fbelow fshall fbe fconsidered fmost fcorrect fto fcomplete fthe
ffollowing f"Gas fcode fknowledge" frelated fstatement: fThe fcode fwould frequire fthe fgas
fvent fpenetrating fthe froof fin-[FIGURE-TP-B-Q1-1A: fGAS fVENT fSIZING] fas fidentified
fat fpoint-[A] fto fbe fnot fless fthan f______ fabove fany fportion fof fa fbuilding fwithin f10-feet
fhorizontally.
A) f24" fB) f3-feet fC) f30-inches fD) fForty-two-inches f- f✔✔24
In fMassachusetts fcopper ftubing fand ffittings fmay fbe fused ffor fnatural fgas fpiping
A) fProvided fthat fthe ftubing fis ftype-k fwith fflared ffitting fconnections. fB) fWhen
fapproved fby fthe fauthority fhaving fjurisdiction.
C) fAt finterior flocations fonly fand fnot fconcealed. f
D) fIf fthe fgas fcontains fno fmore fthan f.03 fgrains fof fhydrogen fsulfide fper f100 fcu. fft. fof
fgas. f- f✔✔If fthe fgas fcontains fno fmore fthan f.03 fgrains fof fhydrogen fsulfide fper f100
fcu. fft. fof fgas
: fA fjourneyman fplumber fand fapprentice, fwho fare femployed fby fa fmaster fplumber, fare
finstalling fa fnatural fgas ffired fcategory-1 fboiler fand fwater fheater fto fan finterior, fclay ftile
flined, fmasonry fchimney. fWhen fmeasured fin fcompliance fwith fthe fcode fthe fchimney
f"height" fis f48-feet. fQUESTION: fWhat fanswer fbelow fshall fbe fconsidered fmost fcorrect
fto fcomplete fthe ffollowing f"Gas fcode fknowledge" frelated fstatement: f_____ fis fthe
fmaximum fallowable famount fof f6-inch fsingle fwall fmetal fvent fconnector fmaterial fthat
fmay fbe finstalled fhorizontally fto fconnect fthe fboiler fand fwater fheater fto fthe fchimney
A) f36-feet fB) f50% fof fthe fchimney fheight fC) f48-feet fD) f9-feet f- f✔✔36 ffeet
: fA fjourneyman fplumber fis finstalling fa fnatural fgas ffired fcategory-1 fboiler fwith fan
findirect fwater fheater. fType-B fdouble fwall fvent fconnector fmaterial fis fbeing fused fto
fvent fproducts fof fcombustion ffrom fthe fboiler fto fan finterior ftile flined fmasonry fchimney
fthat fis f35-feet fin fheight. fQUESTION: fWhat fanswer fbelow fshall fbe fconsidered fmost
fcorrect fto fcomplete fthe ffollowing f"Gas fcode fknowledge" frelated fstatement: fA
fclearance fof f_____ ffrom fcombustibles fshall fbe fmaintained fwhen fusing/installing ftype-
B fvent fmaterials.
A) f6-inches fB) f2" fC) f1-foot fD) fOne-inch f- f✔✔one finch
A)1 fFixture funit f
B)D f2' fX fL' fX f_____= fCapacity f
C)Diameter f÷ f2 f
D) f.00433A)7.5 fGALLONS
A)7.5 fGALLONS
B)5.875
ANSWERS
A fjourneyman fplumber fand fan fapprentice, fwho fare femployed fby fa fmaster fplumber,
fare finstalling fthe fDWV-system fand fwater fdistribution fsystem fin fa f2-½ fstory fsingle
ffamily fdwelling. fQUESTION: fWhat fanswer fbelow fshall fbe fconsidered fmost fcorrect fto
fcomplete fthe ffollowing f"Plumbing fcode fknowledge" frelated fstatement: fA ftrap fthat
fserves fa fsingle fshower fstall fthat fis fequipped fwith fa fhand fshower, fa frain fhead, fand fa
fstandard fshower fhead fshall fbe fno fless fthan f________ fin fminimum fdiameter
A) f1-½" fB) f2" fC) f2-½" fD) f3" f- f✔✔2 finches
A fjourneyman fplumber fand fapprentice fare finstalling f3-inch ffloor fdrains fin fan fopen-
parking-garage fthat fis fsubject fto ffreezing ftemperatures. fQUESTION: fWhat fanswer
fbelow fshall fbe fconsidered fmost fcorrect fto fcomplete fthe ffollowing f"Plumbing fcode
fknowledge" frelated fstatement: fThe finstallation fof ftraps fat fthe ffloor fdrain flocations
fwhich fare ffound fsusceptible fto ffreezing ftemperatures fmay fbe f__________.
A)Increased fto f4-inch fB) fEliminated fC) fWrapped fwith ffreeze fprotection fcable fD)
fInsulated f- f✔✔eliminated
A fjourneyman fplumber fand fapprentice fare finstalling flab fsinks fwith ffaucets fthat fare
fconnected fto fan facid fwaste fsystem ffor-(special fhazardous fwaste) fin fa fmedical flab.
fWhat fanswer fbelow fshall fbe fconsidered fmost fcorrect fto fcomplete fthe ffollowing
f"Plumbing fcode fknowledge" frelated fstatement: fVacuum fbreakers fshall fbe finstalled
fwith fthe fcritical flevel fat fleast f_____-inches fabove fthe fflood flevel frim fof fthe ffixture
fthey fserve fand fon fthe fdischarge fside fof fthe flast fcontrol fvalve fto fthe ffixture.
A) f12 fB) f6 fC) f18 fD) f3 f- f✔✔6 finches
What fanswer fbelow fshall fbe fconsidered fmost fcorrect fto fcomplete fthe ffollowing
f"Plumbing fcode fknowledge" frelated fstatement: fNo fplumbing fpermit fshall fbe fissued
ffor fcross fconnection finstallations fthat frequire f______________ funtil fthe fapplication
ffor fa fpermit fis faccompanied fby fa fletter fof fapproval ffrom fthe fMassachusetts
fDepartment fof fEnvironmental fProtection for fits fdesignee.
A) fRPBP fB) fA f"critical flevel" fheight fC) fAtmospheric fvacuum fbreakers fD) fWater
frecycling fsystems f- f✔✔reduced fpressure fbackflow fpreventer f(RPBP)
: fWhat fanswer fbelow fshall fbe fconsidered fmost fcorrect fto fcomplete fthe ffollowing
f"Plumbing fcode fknowledge" frelated fstatement: fThe fwaste fdischarge ffrom fsafe fwaste
,fpans fserving fwater fheaters for fhot fwater fstorage ftanks fwhere fthere fis f_______ fbelow
fand fshall fbe fpiped findirectly fto fa fproperly ftrapped fand fvented ffixture.
A) fPeople fB) fOccupancy fC) fFloors fD) fPlumbing fconnections f- f✔✔occupancy
GIVEN: fA fjourneyman fplumber fand fan fapprentice, f(who fare femployed fby fa fmaster
fplumber), fare finstalling fthe fsanitary fDWV fand fwater fdistribution fsystem fin fa ffive-story
fresidential fcondominium fcomplex. fQUESTION: fWhat fanswer fbelow fshall fbe
fconsidered fmost fcorrect fto fcomplete fthe ffollowing f"Plumbing fcode fknowledge"
frelated fstatement: fCPVC-(Chlorinated fPolyvinyl fChloride) fpipe fand ffittings fmay fbe
fused fprovided fthat fnone fof fthis fmaterial fis flocated fwithin f____-inches fof fany
fconnection fto fa fhot fwater ftank fas fdefined fin fMGL. fc. f142, f§ f17
A) f12 fB) f18 fC) f20 fD) f24 fE) f30 f- f✔✔24 finches
: fA fjourneyman fplumber fand fapprentice fare froughing-in fmultiple ffixtures fin fa fnew
ffitness fcenter. fThe ffacility fwill finclude fa fjuice fbar, ftemporary fdaycare froom, fmen's
fand fwomen's ftoilet ffacilities fand fmen's fand fwomen's flocker frooms. fQUESTION: fWhat
fanswer fbelow fshall fbe fconsidered fmost fcorrect fto fcomplete fthe ffollowing f"Plumbing
fcode fknowledge" frelated fstatement: fA f________-vent fis fa fbranch fvent fthat fserves
ftwo for fmore ffloor-outlet ffixtures fthat fare fbattery fwasted. fThe fvent fextends ffrom fthe
ftop fof fthe fhorizontal fsoil fand/or fwaste fbranch fin ffront fof fthe flast ffixture fwaste fand
fconnects fto fa fvent fstack for fstack fvent fthat fis fadjacent fto fthe fdown-stream fend fof fthe
fhorizontal fbranch.
A) fSide fB) fLoop fC) fRelief fD) fCircuit f- f✔✔loop
MATCH: f
Elevated fpressure f
Flow fdesignation f
Ten fP.S.I.G. for fless
fLess fthan f2-P.S.I f
A) f3 fP.S.I.G. for ften ftimes
B) fInlet fpressure f
fC) fE.H.D.
D) fProf. fEngineer f- f✔✔elevated fpressure- fd
flow fdesignation-c
Ten fP.S.I.G. for fless-a
Less fthan f2-P.S.I-b
N: fA fjourneyman fplumber fis finstalling fcategory-I fgas fappliances fand fequipment fin fthe
fbasement fof fa fbuilding. fA f120,000 fBTU/hr. fboiler fand f40,000 fBTU/hr. fwater fheater
fare fbeing finstalled. fQUESTION: fWhat fanswer fbelow fshall fbe fconsidered fmost
fcorrect fto fcomplete fthe ffollowing f"Gas fcode fknowledge" frelated fstatement: fThe fboiler
frequires fa fminimum fof f_____-cu. fft. fof fair fto fsupport fproper fcombustion
, A) f2,400 fcu. fft. fB) f120 fsq. fin. fC) f3,200 fsq. fft. fD) f800 fcu. fft. f- f✔✔2,400 fcu. fft.
f120,000/50
) fQUESTION: fWhat fanswer fbelow fshall fbe fconsidered fmost fcorrect fto fcomplete fthe
ffollowing f"Gas fcode fknowledge" frelated fstatement: fThe fcode fwould frequire fthe fgas
fvent fpenetrating fthe froof fin-[FIGURE-TP-B-Q1-1A: fGAS fVENT fSIZING] fas fidentified
fat fpoint-[A] fto fbe fnot fless fthan f______ fabove fany fportion fof fa fbuilding fwithin f10-feet
fhorizontally.
A) f24" fB) f3-feet fC) f30-inches fD) fForty-two-inches f- f✔✔24
In fMassachusetts fcopper ftubing fand ffittings fmay fbe fused ffor fnatural fgas fpiping
A) fProvided fthat fthe ftubing fis ftype-k fwith fflared ffitting fconnections. fB) fWhen
fapproved fby fthe fauthority fhaving fjurisdiction.
C) fAt finterior flocations fonly fand fnot fconcealed. f
D) fIf fthe fgas fcontains fno fmore fthan f.03 fgrains fof fhydrogen fsulfide fper f100 fcu. fft. fof
fgas. f- f✔✔If fthe fgas fcontains fno fmore fthan f.03 fgrains fof fhydrogen fsulfide fper f100
fcu. fft. fof fgas
: fA fjourneyman fplumber fand fapprentice, fwho fare femployed fby fa fmaster fplumber, fare
finstalling fa fnatural fgas ffired fcategory-1 fboiler fand fwater fheater fto fan finterior, fclay ftile
flined, fmasonry fchimney. fWhen fmeasured fin fcompliance fwith fthe fcode fthe fchimney
f"height" fis f48-feet. fQUESTION: fWhat fanswer fbelow fshall fbe fconsidered fmost fcorrect
fto fcomplete fthe ffollowing f"Gas fcode fknowledge" frelated fstatement: f_____ fis fthe
fmaximum fallowable famount fof f6-inch fsingle fwall fmetal fvent fconnector fmaterial fthat
fmay fbe finstalled fhorizontally fto fconnect fthe fboiler fand fwater fheater fto fthe fchimney
A) f36-feet fB) f50% fof fthe fchimney fheight fC) f48-feet fD) f9-feet f- f✔✔36 ffeet
: fA fjourneyman fplumber fis finstalling fa fnatural fgas ffired fcategory-1 fboiler fwith fan
findirect fwater fheater. fType-B fdouble fwall fvent fconnector fmaterial fis fbeing fused fto
fvent fproducts fof fcombustion ffrom fthe fboiler fto fan finterior ftile flined fmasonry fchimney
fthat fis f35-feet fin fheight. fQUESTION: fWhat fanswer fbelow fshall fbe fconsidered fmost
fcorrect fto fcomplete fthe ffollowing f"Gas fcode fknowledge" frelated fstatement: fA
fclearance fof f_____ ffrom fcombustibles fshall fbe fmaintained fwhen fusing/installing ftype-
B fvent fmaterials.
A) f6-inches fB) f2" fC) f1-foot fD) fOne-inch f- f✔✔one finch
A)1 fFixture funit f
B)D f2' fX fL' fX f_____= fCapacity f
C)Diameter f÷ f2 f
D) f.00433A)7.5 fGALLONS
A)7.5 fGALLONS
B)5.875
