Master Plumber (2025) Actual Exam
Questions and Answers A+ Graded
ABS .- .CORRECT .ANSWER-ACRYLONITRILE .BUTADIENE .STYRENE
ALLEY .- .CORRECT .ANSWER-ANY .PUBLIC .SPACE, .PUBLIC .PARK, .OR
.THIRIUGHFARE .LESS .THAN .3 .METERS .BUT .NOT .LESS .THAN .2 .METERS .IN
.WIDTH .DEDICATED .OR .DEEDED .FOR .PUBLIC .USE
ALTER .or .ALTERATION .- .CORRECT .ANSWER-ANY .CHANGE, .ADDITION .OR
.MODIFICATION .IN .CONSTRUCTION .OR .OCCUPANCY
ACCESSIBLE .- .CORRECT .ANSWER-WHEN .APPLIED .TO .A .FIXTURE,
.CONNECTION, .APPLIANCE .OR .EQUIPMENT, .SHALL .MEAN .HAVING .ACCESS
.THERETO, .BUT .WHICH .MAY .REQUIRE .PRIOR .REMOVAL .OF .AN . ACCESS
.PANEL, .DOOR .OR .SIMILAR .OBSTRUCTION. ."READILY .ACCESSIBLE" .SHALL
.MEAN .DIRECT .ACCESS .WITHOUT .THE .NECESSITY .OF .REMOVING .ANY
.PANEL, .DOOR .OR .SIMILAR .OBSTRUCTION.
AIRBREAK .- .CORRECT .ANSWER-A .PHYSICAL .SEPARATION, .WHICH .MAY .BE
.A .LOW .INLET .INTO .THE .INDRECT .WASTE .RECEPTOR .FROM .THE .FIXTURE
.APPLIANCE .OR .DEVICE .INDRECTLY .CONNECTED.
AIR .GAP, .DRAINAGE .- .CORRECT .ANSWER-THE .UNOBSTRUCTED .VERTICAL
.DISTANCE .THROUGH .THE .FREE .ATMOSHPHERE .BETWEEN .THE .LOWEST
.OPENING .FROM .ANY .PIPE, .PLUMBING .FIXTURE, .APPLIANCE .OR
.APPURTENANCE .CONVEYING .WASTE .TO .THE .FLOOD .LEVEL .RIM .OF .THE
.RECEPTOR.
AIR .GAP, .WATER .DISTRIBUTION .- .CORRECT .ANSWER-AN .UNOBSTRUCTED
.VERTICAL .DISTANCE .THROUGH .THE .FREE .ATMOSPHERE .BETWEEN .THE
.LOWEST .OPENING .FROM .ANY .PIPE .OR .FAUCET .CONVEYING .POTABLE
.WATE .TO .THE .FLOOD-LEVEL .RIM .OF .ANY .TANK, .VAT .OR .FIXTURE.
APPROVED .- .CORRECT .ANSWER-ACCEPTED .OR .ACCEPTABLE .UNDER .AN
.APPLICABLE .SPECIFICATIONS .OR .STANDARD .STATED .OR .CITED .IN .THIS
.CODE, .OR .ACCEPTED .AS .SUITABLE .FOR .ANY .PROPOSED .USE .UNDER
.PROCEDURES .AND .POWERS .OF .THE .ADMINISTRATIVE .AUTHORITY.
APPROVED .TESTING .AGENCY .- .CORRECT .ANSWER-AN .ORGANIZTION
.PRIMARILY .ESTABLISHED .FOR .PURPOSES .OF .TESTING .TO .APPROVED
.STANDARDS .AND .APPROVED .BY .THE .ADMINISTRATIVE .AUTHORITY.
,ADMINISTRATIVE .AUTHORITY .- .CORRECT .ANSWER-THE .ADMINISTRATIVE
.AUTHORITY .INCLUDING .THE .BUILDING .OFFICIAL, .THE .COMMISSION, .THE
.BOARD .AND .SUCH .OTHER .DEPARTMENT .OR .AGENCY .ESTABLISHED .AND
.AUTHORIZED .TO .ADMINISTER .AND .ENFORCE .THE .PROVISIONS
BACKFLOW .- .CORRECT .ANSWER-THE .FLOW .OF .WATER .OR .OTHER .LIQUIDS,
.MIXTURES .OR .SUBSTANCES .INTO .THE .DISTRIBUTING .PIPES .OF .A .POTABLE
.SUPPLY .OF .WATER .FROM .ANY .SOURCE .OTHER .THAN .FROM .ITS .INTENDED
.SOURCE
BACKFLOW .CONNECTION .- .CORRECT .ANSWER-CONDITION .OR .ANY
.ARRANGEMENT .WHEREBY .REVERSE .FLOW .CAN .OCCUR
BACKPRESSURE .BACKFLOW .- .CORRECT .ANSWER-OCCURS .DUE .TO .AN
.INCREASED .REVERSE .PRESSURE .ABOVE .THE .SUPPLY .PRESSURE. .THIS
.MAY .BE .DUE .TO .PUMPS, .BOILERS, .GRAVITY .OR .OTHER .SOURCES .OF
.PRESSURE.
BACKFLOW .PREVENTER .- .CORRECT .ANSWER-DEVICE .OR .MEANS .TO
.PREVENT .FLOW .OF .LIQUID .FROM .RETURNING .TO .THE .SOURCE .OF .SUPPLY.
.ALSO .CALLED .VACUUM .BREAKER.
BACK-SIPHONAGE .- .CORRECT .ANSWER-THE .FLOWING .BACK .OF .USED,
.CONTAMINATED .OR .POLLUTED .WATER .FROM .A .PLUMBING .FIXTURE .OR
.VESSEL .INTO .A .WATER .SUPPLY .PIPE .DUE .TO .A .NEGATIVE .PRESSURE .IN
.SUCH .PIPE
BACKWATER .VALVE .- .CORRECT .ANSWER-A .DEVICE .INSTALLED .IN .A
.DRAINAGE .SYSTEM .TO .PREVENT .REVERSE .FLOW
BACKVENT .PIPE .- .CORRECT .ANSWER-THE .PART .OF .A .VENT .LINE, .WHICH
.CONNECTS .DIRECTLY .WITH .AN .INDIVIDUAL .TRAP .UNDERNEATH .OR .BEHIND
.THE .FIXTURE .AND .EXTENDS .TO .THE .BRANCH .OR .MAIN .VENT .PIPE .AT .ANY
.POINT .HIGHER .THAN .THE .FIXTURE .OR .FIXTURE .TRAPS .IT .SERVES. .THIS .IS
.SOMETIMES .CALLED .AN .INDIVIDUAL .VENT
BALL .COCK .- .CORRECT .ANSWER-A .VALVED .OPENED .AND .CLOSED .BY .THE
.FALL .AND .RISE .RESPECTIVELY .OF .AN .ATTACHED .BALL .FLOATING .ON .THE
.SURFACE .OF .THE .LIQUID
BATHROOM .- .CORRECT .ANSWER-A .ROOM .EQUIPPED .WITH .A .SHOWER
.STALL .OR .BATHTUB
BATTER .OF .FIXTURES .- .CORRECT .ANSWER-ANY .OF .TWO .OR .MORE .SIMILAR
.ADJACENT .FIXTURES .WHICH .DISCHARGE .INTO .A .COMMON .HORIZONTAL
.SOIL .OR .WASTE .BRANCH
BELL .OR .HUB .- .CORRECT .ANSWER-THAT .PORTION .OF .A .PIPE .WHICH .FOR .A
.SHORT .DISTANCE .IS .SUFFICIENTLY .ENLARGED .TO .RECEIVE .THE .END .OF
, .ANOTHER .PIPE .OF .THE .SAME .DIAMETER .FOR .THE .PURPOSE .OF .MAKING .A
.CAULKED .OR .PUSH-ON .JOINT
BENDING .PIN .(or .IRON) .- .CORRECT .ANSWER-A .TOOL .FOR .STRAIGHTENING
.OR .BENDING .LEAD .PIPE
BIBB .- .CORRECT .ANSWER-SYNONYMOUS .WITH .FAUCET, .COCK, .TAP, .PLUG,
.ETC., .THE .WORD ."FAUCET" .IS .PREFERRED
BIDET .- .CORRECT .ANSWER-A .PLUMBING .FIXTURES .USED .FOR .WASHING
.THE .MIDDLE .PRIVATE .PART .OF .THE .BODY, .ESPECIALLY .THE .GENITALS.
.ALSO .CALLED ."SITZ" .BATH.
BLANK .FLANGE .- .CORRECT .ANSWER-A .PIPE .FLANGE .THAT .IS .NOT .DRILLED
.FOR .BOLT .HOLES
BLIND .FLANGE .- .CORRECT .ANSWER-A .FLANGE .THAT .CLOSES .THE .END .OF
.A .PIPE. .THERE .IS .NO .OPENING .FOR .THE .PASSAGE .OF .LIQUID .OR .GAS
BLOW-OFF .- .CORRECT .ANSWER-A .CONTROLLED .OUTLET .OF .A .PIPELINE .TO
.DISCHARGE .LIQUID .OR .DETRITUS
BOILER .BLOW-OFF .- .CORRECT .ANSWER-A .VALVED .OUTLET .OF .A .BOILER
.THAT .PERMITS .DISCHARGE .OF .ACCUMULATED .SEDIMENT
BRANCH .- .CORRECT .ANSWER-ANY .PART .OF .THE .PIPING .SYSTEM .OTHER
.THAN .MAIN, .RISER .OR .STACK
BRANCH .INTERVAL .- .CORRECT .ANSWER-A .LENGTH .OF .SOIL .OR .WASTE
.STACK .CORRESPONDING .IN .GENERAL .TO .A .STORY .HEIGHT, .BUT .IN .NO
.CASE .LESS .THAN .2.43 .METERS .WITHIN .WHICH .THE .HORIZONTAL .BRANCHES
.FROM .ONE .FLOOR .OR .STORY .OF .A .BUILDING .ARE .CONNECTED .TO .THE
.STACK
BRANCH .VENT .- .CORRECT .ANSWER-A .HORIZONTAL .VENT .CONNECTING .ONE
.OR .MORE .INDIVIDUAL .VERTICAL .BACK .VENTS .WITH .THE .VENT .STACK .OR
.STACK .VENT
BRAZED .JOINT .- .CORRECT .ANSWER-ANY .JOINT .OBTAINED .BY .JOINING .OF
.METAL .PARTS .WITH .ALLOYS .WHICH .MELT .AT .TEMPERATURES .HIGHER
.THAN .449 .DEGREES .CENTIGRADE, .BUT .LOWER .THAN .THE .MELTING
.TEMPERATURE .OF .THE .PARTS .TO .BE .JOINED
B&S .- .CORRECT .ANSWER-BROWN .AND .SHARPE .(SPECIFICATIONS) .OR .BELL
.AND .SPIGOT .(ENDS .OF .PIPES)
BUILDING .- .CORRECT .ANSWER-A .STRUCTURE .BUILT, .ERECTED .AND
.FRAMED .OF .COMPONENT .STRUCTURAL .PARTS .DESIGNED .FOR .THE
Questions and Answers A+ Graded
ABS .- .CORRECT .ANSWER-ACRYLONITRILE .BUTADIENE .STYRENE
ALLEY .- .CORRECT .ANSWER-ANY .PUBLIC .SPACE, .PUBLIC .PARK, .OR
.THIRIUGHFARE .LESS .THAN .3 .METERS .BUT .NOT .LESS .THAN .2 .METERS .IN
.WIDTH .DEDICATED .OR .DEEDED .FOR .PUBLIC .USE
ALTER .or .ALTERATION .- .CORRECT .ANSWER-ANY .CHANGE, .ADDITION .OR
.MODIFICATION .IN .CONSTRUCTION .OR .OCCUPANCY
ACCESSIBLE .- .CORRECT .ANSWER-WHEN .APPLIED .TO .A .FIXTURE,
.CONNECTION, .APPLIANCE .OR .EQUIPMENT, .SHALL .MEAN .HAVING .ACCESS
.THERETO, .BUT .WHICH .MAY .REQUIRE .PRIOR .REMOVAL .OF .AN . ACCESS
.PANEL, .DOOR .OR .SIMILAR .OBSTRUCTION. ."READILY .ACCESSIBLE" .SHALL
.MEAN .DIRECT .ACCESS .WITHOUT .THE .NECESSITY .OF .REMOVING .ANY
.PANEL, .DOOR .OR .SIMILAR .OBSTRUCTION.
AIRBREAK .- .CORRECT .ANSWER-A .PHYSICAL .SEPARATION, .WHICH .MAY .BE
.A .LOW .INLET .INTO .THE .INDRECT .WASTE .RECEPTOR .FROM .THE .FIXTURE
.APPLIANCE .OR .DEVICE .INDRECTLY .CONNECTED.
AIR .GAP, .DRAINAGE .- .CORRECT .ANSWER-THE .UNOBSTRUCTED .VERTICAL
.DISTANCE .THROUGH .THE .FREE .ATMOSHPHERE .BETWEEN .THE .LOWEST
.OPENING .FROM .ANY .PIPE, .PLUMBING .FIXTURE, .APPLIANCE .OR
.APPURTENANCE .CONVEYING .WASTE .TO .THE .FLOOD .LEVEL .RIM .OF .THE
.RECEPTOR.
AIR .GAP, .WATER .DISTRIBUTION .- .CORRECT .ANSWER-AN .UNOBSTRUCTED
.VERTICAL .DISTANCE .THROUGH .THE .FREE .ATMOSPHERE .BETWEEN .THE
.LOWEST .OPENING .FROM .ANY .PIPE .OR .FAUCET .CONVEYING .POTABLE
.WATE .TO .THE .FLOOD-LEVEL .RIM .OF .ANY .TANK, .VAT .OR .FIXTURE.
APPROVED .- .CORRECT .ANSWER-ACCEPTED .OR .ACCEPTABLE .UNDER .AN
.APPLICABLE .SPECIFICATIONS .OR .STANDARD .STATED .OR .CITED .IN .THIS
.CODE, .OR .ACCEPTED .AS .SUITABLE .FOR .ANY .PROPOSED .USE .UNDER
.PROCEDURES .AND .POWERS .OF .THE .ADMINISTRATIVE .AUTHORITY.
APPROVED .TESTING .AGENCY .- .CORRECT .ANSWER-AN .ORGANIZTION
.PRIMARILY .ESTABLISHED .FOR .PURPOSES .OF .TESTING .TO .APPROVED
.STANDARDS .AND .APPROVED .BY .THE .ADMINISTRATIVE .AUTHORITY.
,ADMINISTRATIVE .AUTHORITY .- .CORRECT .ANSWER-THE .ADMINISTRATIVE
.AUTHORITY .INCLUDING .THE .BUILDING .OFFICIAL, .THE .COMMISSION, .THE
.BOARD .AND .SUCH .OTHER .DEPARTMENT .OR .AGENCY .ESTABLISHED .AND
.AUTHORIZED .TO .ADMINISTER .AND .ENFORCE .THE .PROVISIONS
BACKFLOW .- .CORRECT .ANSWER-THE .FLOW .OF .WATER .OR .OTHER .LIQUIDS,
.MIXTURES .OR .SUBSTANCES .INTO .THE .DISTRIBUTING .PIPES .OF .A .POTABLE
.SUPPLY .OF .WATER .FROM .ANY .SOURCE .OTHER .THAN .FROM .ITS .INTENDED
.SOURCE
BACKFLOW .CONNECTION .- .CORRECT .ANSWER-CONDITION .OR .ANY
.ARRANGEMENT .WHEREBY .REVERSE .FLOW .CAN .OCCUR
BACKPRESSURE .BACKFLOW .- .CORRECT .ANSWER-OCCURS .DUE .TO .AN
.INCREASED .REVERSE .PRESSURE .ABOVE .THE .SUPPLY .PRESSURE. .THIS
.MAY .BE .DUE .TO .PUMPS, .BOILERS, .GRAVITY .OR .OTHER .SOURCES .OF
.PRESSURE.
BACKFLOW .PREVENTER .- .CORRECT .ANSWER-DEVICE .OR .MEANS .TO
.PREVENT .FLOW .OF .LIQUID .FROM .RETURNING .TO .THE .SOURCE .OF .SUPPLY.
.ALSO .CALLED .VACUUM .BREAKER.
BACK-SIPHONAGE .- .CORRECT .ANSWER-THE .FLOWING .BACK .OF .USED,
.CONTAMINATED .OR .POLLUTED .WATER .FROM .A .PLUMBING .FIXTURE .OR
.VESSEL .INTO .A .WATER .SUPPLY .PIPE .DUE .TO .A .NEGATIVE .PRESSURE .IN
.SUCH .PIPE
BACKWATER .VALVE .- .CORRECT .ANSWER-A .DEVICE .INSTALLED .IN .A
.DRAINAGE .SYSTEM .TO .PREVENT .REVERSE .FLOW
BACKVENT .PIPE .- .CORRECT .ANSWER-THE .PART .OF .A .VENT .LINE, .WHICH
.CONNECTS .DIRECTLY .WITH .AN .INDIVIDUAL .TRAP .UNDERNEATH .OR .BEHIND
.THE .FIXTURE .AND .EXTENDS .TO .THE .BRANCH .OR .MAIN .VENT .PIPE .AT .ANY
.POINT .HIGHER .THAN .THE .FIXTURE .OR .FIXTURE .TRAPS .IT .SERVES. .THIS .IS
.SOMETIMES .CALLED .AN .INDIVIDUAL .VENT
BALL .COCK .- .CORRECT .ANSWER-A .VALVED .OPENED .AND .CLOSED .BY .THE
.FALL .AND .RISE .RESPECTIVELY .OF .AN .ATTACHED .BALL .FLOATING .ON .THE
.SURFACE .OF .THE .LIQUID
BATHROOM .- .CORRECT .ANSWER-A .ROOM .EQUIPPED .WITH .A .SHOWER
.STALL .OR .BATHTUB
BATTER .OF .FIXTURES .- .CORRECT .ANSWER-ANY .OF .TWO .OR .MORE .SIMILAR
.ADJACENT .FIXTURES .WHICH .DISCHARGE .INTO .A .COMMON .HORIZONTAL
.SOIL .OR .WASTE .BRANCH
BELL .OR .HUB .- .CORRECT .ANSWER-THAT .PORTION .OF .A .PIPE .WHICH .FOR .A
.SHORT .DISTANCE .IS .SUFFICIENTLY .ENLARGED .TO .RECEIVE .THE .END .OF
, .ANOTHER .PIPE .OF .THE .SAME .DIAMETER .FOR .THE .PURPOSE .OF .MAKING .A
.CAULKED .OR .PUSH-ON .JOINT
BENDING .PIN .(or .IRON) .- .CORRECT .ANSWER-A .TOOL .FOR .STRAIGHTENING
.OR .BENDING .LEAD .PIPE
BIBB .- .CORRECT .ANSWER-SYNONYMOUS .WITH .FAUCET, .COCK, .TAP, .PLUG,
.ETC., .THE .WORD ."FAUCET" .IS .PREFERRED
BIDET .- .CORRECT .ANSWER-A .PLUMBING .FIXTURES .USED .FOR .WASHING
.THE .MIDDLE .PRIVATE .PART .OF .THE .BODY, .ESPECIALLY .THE .GENITALS.
.ALSO .CALLED ."SITZ" .BATH.
BLANK .FLANGE .- .CORRECT .ANSWER-A .PIPE .FLANGE .THAT .IS .NOT .DRILLED
.FOR .BOLT .HOLES
BLIND .FLANGE .- .CORRECT .ANSWER-A .FLANGE .THAT .CLOSES .THE .END .OF
.A .PIPE. .THERE .IS .NO .OPENING .FOR .THE .PASSAGE .OF .LIQUID .OR .GAS
BLOW-OFF .- .CORRECT .ANSWER-A .CONTROLLED .OUTLET .OF .A .PIPELINE .TO
.DISCHARGE .LIQUID .OR .DETRITUS
BOILER .BLOW-OFF .- .CORRECT .ANSWER-A .VALVED .OUTLET .OF .A .BOILER
.THAT .PERMITS .DISCHARGE .OF .ACCUMULATED .SEDIMENT
BRANCH .- .CORRECT .ANSWER-ANY .PART .OF .THE .PIPING .SYSTEM .OTHER
.THAN .MAIN, .RISER .OR .STACK
BRANCH .INTERVAL .- .CORRECT .ANSWER-A .LENGTH .OF .SOIL .OR .WASTE
.STACK .CORRESPONDING .IN .GENERAL .TO .A .STORY .HEIGHT, .BUT .IN .NO
.CASE .LESS .THAN .2.43 .METERS .WITHIN .WHICH .THE .HORIZONTAL .BRANCHES
.FROM .ONE .FLOOR .OR .STORY .OF .A .BUILDING .ARE .CONNECTED .TO .THE
.STACK
BRANCH .VENT .- .CORRECT .ANSWER-A .HORIZONTAL .VENT .CONNECTING .ONE
.OR .MORE .INDIVIDUAL .VERTICAL .BACK .VENTS .WITH .THE .VENT .STACK .OR
.STACK .VENT
BRAZED .JOINT .- .CORRECT .ANSWER-ANY .JOINT .OBTAINED .BY .JOINING .OF
.METAL .PARTS .WITH .ALLOYS .WHICH .MELT .AT .TEMPERATURES .HIGHER
.THAN .449 .DEGREES .CENTIGRADE, .BUT .LOWER .THAN .THE .MELTING
.TEMPERATURE .OF .THE .PARTS .TO .BE .JOINED
B&S .- .CORRECT .ANSWER-BROWN .AND .SHARPE .(SPECIFICATIONS) .OR .BELL
.AND .SPIGOT .(ENDS .OF .PIPES)
BUILDING .- .CORRECT .ANSWER-A .STRUCTURE .BUILT, .ERECTED .AND
.FRAMED .OF .COMPONENT .STRUCTURAL .PARTS .DESIGNED .FOR .THE
