Final Exam Massachusetts Plumbers
Journeyman Questions with All
Accurate Solutions 2025-2026
Updated.
Existing Work - Answer A plumbing system or any part thereof installed prior to March 11,
2005.
Soil Pipe - Answer Any pipe that conveys the discharge of toilets, urinals or fixtures having
similar functions to the building drain or building sewer. The discharge may be conveyed with or
without the discharge from other fixtures
Water Distribution Pipe - Answer A pipe within the building or on the premises that conveys
water from the water service pipe to the point of usage
Barometric Loop. - Answer A vertical loop of pipe, rising to a height sufficient to prevent
back-siphonage from occurring in the potable water supply pipe. (Approximately 35 feet,
depending on the weight of the atmosphere.)
Developed Length - Answer The length of a pipeline as measured along the center line of the
pipe or fittings.
Roughing-in. - Answer The installation of all parts of the plumbing system that can be
completed prior to the installation of fixtures. This includes drainage piping, water supply
piping, vent piping, the necessary fixture supports, and any fixtures that are built into the
building.
Trap Seal - Answer The vertical distance between the crown weir and the top of the dip of
the trap.
Air Gap (Drainage System). - Answer The unobstructed vertical distance through the free
atmosphere between the outlet of a waste pipe and the flood level rim of the receptacle into
which the waste discharges.
Air
,Liquid Waste - Answer Discharge from any fixture, appliance, area or appurtenance that
does not contain human or animal waste matter suspended in a solution.
Vacuum - Answer Any pressure less than that exerted by the atmosphere
Branch Interval - Answer A distance along a soil or waste stack corresponding in general to a
story height, but not less than eight feet in vertical height, and wherein the horizontal branches
from one floor or story of a building are connected to the stack
Testing water supply shall be at a pressure no less than? - Answer 125 PSI
Storm or Sanitary drains shall be installed at a slope that: - Answer a slope that produces a
computed velocity of discharge of not less than two feet per second.
Horizontal drainage piping which is (3) three inches in diameter or smaller shall be installed with
a minimum uniform pitch - Answer ¼ inch per foot
Horizontal drainage piping which is larger than three inches in diameter shall be installed with a
minimum uniform pitch of - Answer 1/8 inch per foot
Special Labs. All licensed plumbers and plumbing apprentices installing pipe connections or
working on drains to hospital waste and vent systems, mortuary waste and vent systems,
laboratory waste and vent systems, dental waste and vent systems and plumbing systems in
radioactive sensitive areas - Answer shall have the surface of their body and clothing
protected by disposable or washable gowns similar or equal to the gowns, gloves and face
masks worn by surgical staff.
Whenever there is reason to believe that the plumbing system of any building has become
defective, it shall be subjected - Answer test and/or inspection, and any defects found shall
be corrected as required in writing by the Inspector
Waste and Vent shall be tested for? - Answer until there is a uniform gauge pressure of five
P.S.I.G. or sufficient pressure to balance a column of mercury ten inches in height. This pressure
shall be held without introduction of additional air for a period of at least 15 minutes. The
gauge used for this test shall be calibrated in increments no greater than 1/10 of a pound. c
, Two acceptable tests for Drain and Waste - Answer Peppermint Test and Air Test
Quarter bends, or their equivalent may be used in soil and waste lines when the change in the
direction of the flow is from the - Answer horizontal to the vertical.
Short sweep fittings may be used in a branch waste line when the waste line serves only -
Answer one outlet and cleanouts are provided.
List 3 Prohibited Fittings - Answer -No fitting that incorporates a straight T branch shall be
used as a drainage fitting.
- No running threads, bands or saddles shall be used in a drainage system.
-A fitting commonly referred to as a "Sisson Joint" is prohibited
A dead end may be used to? - Answer Extend the cleanout.
Where trenches are excavated below grade such that the bottom of the trench does not form
the bed for the pipe, the trench shall be? - Answer back-filled to grade with sand tamped in
place so as to provide a uniform bearing surface for the pipe between joints.
Where rock is encountered in trenching, The rock shall be removed to a point - Answer at
least three inches below the grade line of the trench and the trench shall be backfilled to grade
with sand tamped in place so as to provide a uniform bearing for the pipe between joints; and
b. care shall be exercised to ensure that no portion of the pipe, including its joints, rests on any
portion of a rock
Backfilling. 1. Until the crown of the pipe is covered by at lest____________ feet of tamped
earth considerable care shall be exercised in backfilling trenches - Answer two feet
When are deviations from the plumbing code permited? - Answer -Existing buildings for
repair or remodel work
-Inspectors permission prior to the start of the job
-They are necessary and conform to the intent of the code
If a plumbing inspector finds code violations in any existing plumbing or gas system that may
Journeyman Questions with All
Accurate Solutions 2025-2026
Updated.
Existing Work - Answer A plumbing system or any part thereof installed prior to March 11,
2005.
Soil Pipe - Answer Any pipe that conveys the discharge of toilets, urinals or fixtures having
similar functions to the building drain or building sewer. The discharge may be conveyed with or
without the discharge from other fixtures
Water Distribution Pipe - Answer A pipe within the building or on the premises that conveys
water from the water service pipe to the point of usage
Barometric Loop. - Answer A vertical loop of pipe, rising to a height sufficient to prevent
back-siphonage from occurring in the potable water supply pipe. (Approximately 35 feet,
depending on the weight of the atmosphere.)
Developed Length - Answer The length of a pipeline as measured along the center line of the
pipe or fittings.
Roughing-in. - Answer The installation of all parts of the plumbing system that can be
completed prior to the installation of fixtures. This includes drainage piping, water supply
piping, vent piping, the necessary fixture supports, and any fixtures that are built into the
building.
Trap Seal - Answer The vertical distance between the crown weir and the top of the dip of
the trap.
Air Gap (Drainage System). - Answer The unobstructed vertical distance through the free
atmosphere between the outlet of a waste pipe and the flood level rim of the receptacle into
which the waste discharges.
Air
,Liquid Waste - Answer Discharge from any fixture, appliance, area or appurtenance that
does not contain human or animal waste matter suspended in a solution.
Vacuum - Answer Any pressure less than that exerted by the atmosphere
Branch Interval - Answer A distance along a soil or waste stack corresponding in general to a
story height, but not less than eight feet in vertical height, and wherein the horizontal branches
from one floor or story of a building are connected to the stack
Testing water supply shall be at a pressure no less than? - Answer 125 PSI
Storm or Sanitary drains shall be installed at a slope that: - Answer a slope that produces a
computed velocity of discharge of not less than two feet per second.
Horizontal drainage piping which is (3) three inches in diameter or smaller shall be installed with
a minimum uniform pitch - Answer ¼ inch per foot
Horizontal drainage piping which is larger than three inches in diameter shall be installed with a
minimum uniform pitch of - Answer 1/8 inch per foot
Special Labs. All licensed plumbers and plumbing apprentices installing pipe connections or
working on drains to hospital waste and vent systems, mortuary waste and vent systems,
laboratory waste and vent systems, dental waste and vent systems and plumbing systems in
radioactive sensitive areas - Answer shall have the surface of their body and clothing
protected by disposable or washable gowns similar or equal to the gowns, gloves and face
masks worn by surgical staff.
Whenever there is reason to believe that the plumbing system of any building has become
defective, it shall be subjected - Answer test and/or inspection, and any defects found shall
be corrected as required in writing by the Inspector
Waste and Vent shall be tested for? - Answer until there is a uniform gauge pressure of five
P.S.I.G. or sufficient pressure to balance a column of mercury ten inches in height. This pressure
shall be held without introduction of additional air for a period of at least 15 minutes. The
gauge used for this test shall be calibrated in increments no greater than 1/10 of a pound. c
, Two acceptable tests for Drain and Waste - Answer Peppermint Test and Air Test
Quarter bends, or their equivalent may be used in soil and waste lines when the change in the
direction of the flow is from the - Answer horizontal to the vertical.
Short sweep fittings may be used in a branch waste line when the waste line serves only -
Answer one outlet and cleanouts are provided.
List 3 Prohibited Fittings - Answer -No fitting that incorporates a straight T branch shall be
used as a drainage fitting.
- No running threads, bands or saddles shall be used in a drainage system.
-A fitting commonly referred to as a "Sisson Joint" is prohibited
A dead end may be used to? - Answer Extend the cleanout.
Where trenches are excavated below grade such that the bottom of the trench does not form
the bed for the pipe, the trench shall be? - Answer back-filled to grade with sand tamped in
place so as to provide a uniform bearing surface for the pipe between joints.
Where rock is encountered in trenching, The rock shall be removed to a point - Answer at
least three inches below the grade line of the trench and the trench shall be backfilled to grade
with sand tamped in place so as to provide a uniform bearing for the pipe between joints; and
b. care shall be exercised to ensure that no portion of the pipe, including its joints, rests on any
portion of a rock
Backfilling. 1. Until the crown of the pipe is covered by at lest____________ feet of tamped
earth considerable care shall be exercised in backfilling trenches - Answer two feet
When are deviations from the plumbing code permited? - Answer -Existing buildings for
repair or remodel work
-Inspectors permission prior to the start of the job
-They are necessary and conform to the intent of the code
If a plumbing inspector finds code violations in any existing plumbing or gas system that may
