JOURNEYMAN PLUMBING EXAM 2025
QUESTIONS AND ANSWERS 100%
CORRECT.
Travel - ANSWERThe Distance from the initial offset to the second fitting
Advance - ANSWERDistance parallel to the pipes between the offset fittings
Offset - ANSWERDistance the pipe is offset from original position to new position
Rolling offsets formula - ANSWERTravel = Rise x 2 = Spread x 2
What are the three ways water is present? - ANSWERSolid - Ice
Liquid - Water
Gas - Steam
Pressure formula? - ANSWERPressure= Head x .434
Head Formula? - ANSWERHead = Pressure x 2.3
Calculate the travel of 45 degree offset with a rise of 8" and a spread of 20" -
ANSWERTravel = 21.54 x 1.414 = 30.45
Answer = 30 1/2"
Pressure is 60 psi, you must run a water service to a house built on a 30 foot rise. What
is going to be the pressure at the house? - ANSWERPressure = Head x .434
30 x .434 = 13.02 loss ( Uphill )
60 - 13 = 47
Answer = 47 psi
Volume of a pipe formula? - ANSWER.0408 x D^2 x L
Calculate the volume of a tank ( pipe ) 20 feet in height, with a diameter of 48" -
ANSWERAnswer = 434,294,78 cu inches
* when we have cubic inches, must multiply volume by 231
(1880.06 gallons x 231)
Calculate 1 1/2" pipe with an advance of 48" - ANSWERAnswer = 64 7/8 "
Travel = 1.414 x advance
1.414 x 48 = 67 7/8 "
Minus 3 ( 1 1/2 for both fittings )
= 64 7/8"
,Payment formula? - ANSWERPayment = Base x Rate
Rate formula? - ANSWERRate = Payment divided by Base
You estimated a job at $2195, you need $900 upfront, what is the percent you collect
upfront? - ANSWERAnswer = 41%
Rate = 900 divided by 2195 = 41%
When calculating offsets, what must be given? - ANSWEROffset(Base) and
Advance(altitude)
When can you use PVC schedule 40 water pipe? - ANSWERCold Water distribution
systems
When can you use CPVC water pipe and fittings? - ANSWERCold + Hot water
distribution water systems
What is the blue print symbol for cold water? - ANSWERLong line - long line - Long line
-
Blue print symbol for hot water return line? - ANSWERLong line short line short line long
line
Potable Water, Sanitary Drainage, Fuel Gas piping, Storm Water. Which one is not
included in Plumbing Systems in buildings? - ANSWERFuel Gas Piping
What is Galvanic action? - ANSWERElectrolytic chemical reaction between dissimilar
metals such as copper and iron
What is the most common scales used in building drawings - ANSWER1/8" = 1' and
1/4" = 1 '
Wall hung water closet bowls shall be? - ANSWERRigidly supported by concealed
metal supports
On a gas water heater, what is a thermocouple? - ANSWERSmall electric generator
Difference between a sink and a lavatory? - ANSWERSinks = functional units Lavatory
= Washing fixture
How are drainage and venting in buildings larger than 5 buildings larger than 5 stories
high tested? - ANSWERYou test each 5 story section with a 10 ft head of water
What prevents a chemical sink from being damaged? - ANSWERContinually running
water and being manufactured out of chemical resistance materials
, What is the purpose of a dip tube on a water heater? - ANSWERTransfers water from
inlet to bottom of tank and helps prevent backsiphonage by having small hole at the top
of the dip tube
Air test on water supply lines? - ANSWER1 1/2 times the working pressure or 150 psi,
which ever is larger
What is the type of heating element used in electric water heaters? -
ANSWERResistance heating elements
Primary purpose of vent line in a water closet is? - ANSWERPrevent loss from trap seal
What are the 2 primary water sources for public potable drinking water? -
ANSWERSurface and ground water
What is a cross connection? - ANSWERWhen 2 separate piping systems one potable
and one undesirable flow into each other
Example: Garden hose attached to a silcock with the other end lying in a cesspool
What is the hydrologic cycle? - ANSWERA continuous exchange of water among
atmosphere, the earth, and water bodies
What device can be used to add a small amount of water to a floor drain trap to ensure
an adequate trap seal? - ANSWERTrap Primer
What temperature is necessary for brazing and then adding the filler? - ANSWER840
degrees Fahrenheit
Three dimensional drawing of a plumbing system is called? - ANSWERIsometric
Most common individual vent is called? - ANSWERA continuous vent
A vertical pipe installed to provide circulation of air to and from the drainage system is
called? - ANSWERA Vent Stack
Drain fixture unit rating for a kitchen sink? - ANSWER2 DFU
Drain Fixture Unit
The fitting that mounts under the drain plug on a bathtub waste and overflow is called? -
ANSWERWaste Shoe
What is the maximum volume of water to flush a water closet? - ANSWER1.6 gallons
Energy Policy Act of 1992
QUESTIONS AND ANSWERS 100%
CORRECT.
Travel - ANSWERThe Distance from the initial offset to the second fitting
Advance - ANSWERDistance parallel to the pipes between the offset fittings
Offset - ANSWERDistance the pipe is offset from original position to new position
Rolling offsets formula - ANSWERTravel = Rise x 2 = Spread x 2
What are the three ways water is present? - ANSWERSolid - Ice
Liquid - Water
Gas - Steam
Pressure formula? - ANSWERPressure= Head x .434
Head Formula? - ANSWERHead = Pressure x 2.3
Calculate the travel of 45 degree offset with a rise of 8" and a spread of 20" -
ANSWERTravel = 21.54 x 1.414 = 30.45
Answer = 30 1/2"
Pressure is 60 psi, you must run a water service to a house built on a 30 foot rise. What
is going to be the pressure at the house? - ANSWERPressure = Head x .434
30 x .434 = 13.02 loss ( Uphill )
60 - 13 = 47
Answer = 47 psi
Volume of a pipe formula? - ANSWER.0408 x D^2 x L
Calculate the volume of a tank ( pipe ) 20 feet in height, with a diameter of 48" -
ANSWERAnswer = 434,294,78 cu inches
* when we have cubic inches, must multiply volume by 231
(1880.06 gallons x 231)
Calculate 1 1/2" pipe with an advance of 48" - ANSWERAnswer = 64 7/8 "
Travel = 1.414 x advance
1.414 x 48 = 67 7/8 "
Minus 3 ( 1 1/2 for both fittings )
= 64 7/8"
,Payment formula? - ANSWERPayment = Base x Rate
Rate formula? - ANSWERRate = Payment divided by Base
You estimated a job at $2195, you need $900 upfront, what is the percent you collect
upfront? - ANSWERAnswer = 41%
Rate = 900 divided by 2195 = 41%
When calculating offsets, what must be given? - ANSWEROffset(Base) and
Advance(altitude)
When can you use PVC schedule 40 water pipe? - ANSWERCold Water distribution
systems
When can you use CPVC water pipe and fittings? - ANSWERCold + Hot water
distribution water systems
What is the blue print symbol for cold water? - ANSWERLong line - long line - Long line
-
Blue print symbol for hot water return line? - ANSWERLong line short line short line long
line
Potable Water, Sanitary Drainage, Fuel Gas piping, Storm Water. Which one is not
included in Plumbing Systems in buildings? - ANSWERFuel Gas Piping
What is Galvanic action? - ANSWERElectrolytic chemical reaction between dissimilar
metals such as copper and iron
What is the most common scales used in building drawings - ANSWER1/8" = 1' and
1/4" = 1 '
Wall hung water closet bowls shall be? - ANSWERRigidly supported by concealed
metal supports
On a gas water heater, what is a thermocouple? - ANSWERSmall electric generator
Difference between a sink and a lavatory? - ANSWERSinks = functional units Lavatory
= Washing fixture
How are drainage and venting in buildings larger than 5 buildings larger than 5 stories
high tested? - ANSWERYou test each 5 story section with a 10 ft head of water
What prevents a chemical sink from being damaged? - ANSWERContinually running
water and being manufactured out of chemical resistance materials
, What is the purpose of a dip tube on a water heater? - ANSWERTransfers water from
inlet to bottom of tank and helps prevent backsiphonage by having small hole at the top
of the dip tube
Air test on water supply lines? - ANSWER1 1/2 times the working pressure or 150 psi,
which ever is larger
What is the type of heating element used in electric water heaters? -
ANSWERResistance heating elements
Primary purpose of vent line in a water closet is? - ANSWERPrevent loss from trap seal
What are the 2 primary water sources for public potable drinking water? -
ANSWERSurface and ground water
What is a cross connection? - ANSWERWhen 2 separate piping systems one potable
and one undesirable flow into each other
Example: Garden hose attached to a silcock with the other end lying in a cesspool
What is the hydrologic cycle? - ANSWERA continuous exchange of water among
atmosphere, the earth, and water bodies
What device can be used to add a small amount of water to a floor drain trap to ensure
an adequate trap seal? - ANSWERTrap Primer
What temperature is necessary for brazing and then adding the filler? - ANSWER840
degrees Fahrenheit
Three dimensional drawing of a plumbing system is called? - ANSWERIsometric
Most common individual vent is called? - ANSWERA continuous vent
A vertical pipe installed to provide circulation of air to and from the drainage system is
called? - ANSWERA Vent Stack
Drain fixture unit rating for a kitchen sink? - ANSWER2 DFU
Drain Fixture Unit
The fitting that mounts under the drain plug on a bathtub waste and overflow is called? -
ANSWERWaste Shoe
What is the maximum volume of water to flush a water closet? - ANSWER1.6 gallons
Energy Policy Act of 1992
