MASTER PLUMBER EXAM QUESTIONS
AND ANSWERS 2026 VERIFIED.
ABS - ANS ACRYLONITRILE BUTADIENE STYRENE
ALLEY - ANS 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 - ANS ANY CHANGE, ADDITION OR MODIFICATION IN CONSTRUCTION
OR OCCUPANCY
ACCESSIBLE - ANS 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 - ANS 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 - ANS 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.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 1 OF 28
,AIR GAP, WATER DISTRIBUTION - ANS 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 - ANS 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 - ANS AN ORGANIZTION PRIMARILY ESTABLISHED FOR
PURPOSES OF TESTING TO APPROVED STANDARDS AND APPROVED BY THE ADMINISTRATIVE
AUTHORITY.
ADMINISTRATIVE AUTHORITY - ANS 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 - ANS 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 - ANS CONDITION OR ANY ARRANGEMENT WHEREBY REVERSE
FLOW CAN OCCUR
BACKPRESSURE BACKFLOW - ANS 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 - ANS DEVICE OR MEANS TO PREVENT FLOW OF LIQUID FROM
RETURNING TO THE SOURCE OF SUPPLY. ALSO CALLED VACUUM BREAKER.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 2 OF 28
, BACK-SIPHONAGE - ANS 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 - ANS A DEVICE INSTALLED IN A DRAINAGE SYSTEM TO PREVENT REVERSE
FLOW
BACKVENT PIPE - ANS 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 - ANS A VALVED OPENED AND CLOSED BY THE FALL AND RISE RESPECTIVELY OF
AN ATTACHED BALL FLOATING ON THE SURFACE OF THE LIQUID
BATHROOM - ANS A ROOM EQUIPPED WITH A SHOWER STALL OR BATHTUB
BATTER OF FIXTURES - ANS ANY OF TWO OR MORE SIMILAR ADJACENT FIXTURES WHICH
DISCHARGE INTO A COMMON HORIZONTAL SOIL OR WASTE BRANCH
BELL OR HUB - ANS 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) - ANS A TOOL FOR STRAIGHTENING OR BENDING LEAD PIPE
BIBB - ANS SYNONYMOUS WITH FAUCET, COCK, TAP, PLUG, ETC., THE WORD "FAUCET" IS
PREFERRED
@COPYRIGHT ALL RIGHTS RESERVED PAGE 3 OF 28
AND ANSWERS 2026 VERIFIED.
ABS - ANS ACRYLONITRILE BUTADIENE STYRENE
ALLEY - ANS 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 - ANS ANY CHANGE, ADDITION OR MODIFICATION IN CONSTRUCTION
OR OCCUPANCY
ACCESSIBLE - ANS 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 - ANS 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 - ANS 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.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 1 OF 28
,AIR GAP, WATER DISTRIBUTION - ANS 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 - ANS 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 - ANS AN ORGANIZTION PRIMARILY ESTABLISHED FOR
PURPOSES OF TESTING TO APPROVED STANDARDS AND APPROVED BY THE ADMINISTRATIVE
AUTHORITY.
ADMINISTRATIVE AUTHORITY - ANS 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 - ANS 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 - ANS CONDITION OR ANY ARRANGEMENT WHEREBY REVERSE
FLOW CAN OCCUR
BACKPRESSURE BACKFLOW - ANS 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 - ANS DEVICE OR MEANS TO PREVENT FLOW OF LIQUID FROM
RETURNING TO THE SOURCE OF SUPPLY. ALSO CALLED VACUUM BREAKER.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 2 OF 28
, BACK-SIPHONAGE - ANS 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 - ANS A DEVICE INSTALLED IN A DRAINAGE SYSTEM TO PREVENT REVERSE
FLOW
BACKVENT PIPE - ANS 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 - ANS A VALVED OPENED AND CLOSED BY THE FALL AND RISE RESPECTIVELY OF
AN ATTACHED BALL FLOATING ON THE SURFACE OF THE LIQUID
BATHROOM - ANS A ROOM EQUIPPED WITH A SHOWER STALL OR BATHTUB
BATTER OF FIXTURES - ANS ANY OF TWO OR MORE SIMILAR ADJACENT FIXTURES WHICH
DISCHARGE INTO A COMMON HORIZONTAL SOIL OR WASTE BRANCH
BELL OR HUB - ANS 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) - ANS A TOOL FOR STRAIGHTENING OR BENDING LEAD PIPE
BIBB - ANS SYNONYMOUS WITH FAUCET, COCK, TAP, PLUG, ETC., THE WORD "FAUCET" IS
PREFERRED
@COPYRIGHT ALL RIGHTS RESERVED PAGE 3 OF 28
