Massachusetts Plumbers Journeyman Exam || acknowledged
answers 100%.
Existing Work correct answers A plumbing system or any part thereof installed prior to March
11, 2005.
Soil Pipe correct answers 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 correct answers A pipe within the building or on the premises that
conveys water from the water service pipe to the point of usage
Barometric Loop. correct answers 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 correct answers The length of a pipeline as measured along the center line of
the pipe or fittings.
Roughing-in. correct answers 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 correct answers The vertical distance between the crown weir and the top of the dip of
the trap.
Air Gap (Drainage System). correct answers 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
,Fixture Unit. correct answers A unit of liquid flow used in sizing both supply and drainage pipes.
It is equal to 1 cubic foot per minute or approximately 7.5 gallons per minute.
Liquid Waste correct answers Discharge from any fixture, appliance, area or appurtenance that
does not contain human or animal waste matter suspended in a solution.
Vacuum correct answers Any pressure less than that exerted by the atmosphere
Branch Interval correct answers 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? correct answers 125 PSI
Storm or Sanitary drains shall be installed at a slope that: correct answers 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 correct answers ¼ inch per foot
Horizontal drainage piping which is larger than three inches in diameter shall be installed with a
minimum uniform pitch of correct answers 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 correct answers 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 correct answers 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? correct answers 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
Upon completion of a section or of the entire water supply system when roughed, it shall be
tested and proved tight under a pressure not less than correct answers 125 pounds per square inch
Upon notice of a request for an Inspection of the rough plumbing, the Inspector shall make the
Inspection within correct answers two working days after receipt of such notice
Two acceptable tests for Drain and Waste correct answers 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 correct answers horizontal to the vertical.
Short sweep fittings may be used in a branch waste line when the waste line serves only correct
answers one outlet and cleanouts are provided.
List 3 Prohibited Fittings correct answers -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? correct answers 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? correct answers 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 correct answers 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 correct answers two feet
When are deviations from the plumbing code permited? correct answers -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
cause a health or safety hazard the inspector shall...? correct answers Notify the owner or his or
her agent.
List two requirements when demolishing a building? correct answers 1. You must secure a
plumbing permit
2. Must make all connections gas and water tight.
Storm or sanitary drains shall be installed at a slope that produces a computed velocity of
discharge of not less than correct answers two feet per second
What fitting could you legally install that the branch is larger than the main? correct answers 4x3
closet bend (The enlargement of a three-inch closet bend or stub to four inches shall not be
considered an obstruction).
answers 100%.
Existing Work correct answers A plumbing system or any part thereof installed prior to March
11, 2005.
Soil Pipe correct answers 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 correct answers A pipe within the building or on the premises that
conveys water from the water service pipe to the point of usage
Barometric Loop. correct answers 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 correct answers The length of a pipeline as measured along the center line of
the pipe or fittings.
Roughing-in. correct answers 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 correct answers The vertical distance between the crown weir and the top of the dip of
the trap.
Air Gap (Drainage System). correct answers 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
,Fixture Unit. correct answers A unit of liquid flow used in sizing both supply and drainage pipes.
It is equal to 1 cubic foot per minute or approximately 7.5 gallons per minute.
Liquid Waste correct answers Discharge from any fixture, appliance, area or appurtenance that
does not contain human or animal waste matter suspended in a solution.
Vacuum correct answers Any pressure less than that exerted by the atmosphere
Branch Interval correct answers 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? correct answers 125 PSI
Storm or Sanitary drains shall be installed at a slope that: correct answers 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 correct answers ¼ inch per foot
Horizontal drainage piping which is larger than three inches in diameter shall be installed with a
minimum uniform pitch of correct answers 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 correct answers 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 correct answers 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? correct answers 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
Upon completion of a section or of the entire water supply system when roughed, it shall be
tested and proved tight under a pressure not less than correct answers 125 pounds per square inch
Upon notice of a request for an Inspection of the rough plumbing, the Inspector shall make the
Inspection within correct answers two working days after receipt of such notice
Two acceptable tests for Drain and Waste correct answers 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 correct answers horizontal to the vertical.
Short sweep fittings may be used in a branch waste line when the waste line serves only correct
answers one outlet and cleanouts are provided.
List 3 Prohibited Fittings correct answers -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? correct answers 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? correct answers 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 correct answers 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 correct answers two feet
When are deviations from the plumbing code permited? correct answers -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
cause a health or safety hazard the inspector shall...? correct answers Notify the owner or his or
her agent.
List two requirements when demolishing a building? correct answers 1. You must secure a
plumbing permit
2. Must make all connections gas and water tight.
Storm or sanitary drains shall be installed at a slope that produces a computed velocity of
discharge of not less than correct answers two feet per second
What fitting could you legally install that the branch is larger than the main? correct answers 4x3
closet bend (The enlargement of a three-inch closet bend or stub to four inches shall not be
considered an obstruction).
