JOURNEYMAN PLUMBING EXAM
QUESTIONS AND ANSWERS GRADED A+
2025/2026
Travel - ANS The Distance from the initial offset to the second fitting
Advance - ANS Distance parallel to the pipes between the offset fittings
Offset - ANS Distance the pipe is offset from original position to new position
Rolling offsets formula - ANS Travel = Rise x 2 = Spread x 2
What are the three ways water is present? - ANS Solid - Ice
Liquid - Water
Gas - Steam
Pressure formula? - ANS Pressure= Head x .434
Head Formula? - ANS Head = Pressure x 2.3
Calculate the travel of 45 degree offset with a rise of 8" and a spread of 20" - ANS Travel =
21.54 x 1.414 = 30.45
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,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? - ANS Pressure = Head x .434
30 x .434 = 13.02 loss ( Uphill )
60 - 13 = 47
Answer = 47 psi
Volume of a pipe formula? - ANS .0408 x D^2 x L
Calculate the volume of a tank ( pipe ) 20 feet in height, with a diameter of 48" - ANS Answer
= 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" - ANS Answer = 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? - ANS Payment = Base x Rate
Rate formula? - ANS Rate = Payment divided by Base
You estimated a job at $2195, you need $900 upfront, what is the percent you collect upfront? -
ANS Answer = 41%
Rate = 900 divided by 2195 = 41%
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,When calculating offsets, what must be given? - ANS Offset(Base) and Advance(altitude)
When can you use PVC schedule 40 water pipe? - ANS Cold Water distribution systems
When can you use CPVC water pipe and fittings? - ANS Cold + Hot water distribution water
systems
What is the blue print symbol for cold water? - ANS Long line - long line - Long line -
Blue print symbol for hot water return line? - ANS Long 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? - ANS Fuel Gas Piping
What is Galvanic action? - ANS Electrolytic chemical reaction between dissimilar metals such
as copper and iron
What is the most common scales used in building drawings - ANS 1/8" = 1' and 1/4" = 1 '
Wall hung water closet bowls shall be? - ANS Rigidly supported by concealed metal supports
On a gas water heater, what is a thermocouple? - ANS Small electric generator
Difference between a sink and a lavatory? - ANS Sinks = functional units Lavatory = Washing
fixture
How are drainage and venting in buildings larger than 5 buildings larger than 5 stories high
tested? - ANS You test each 5 story section with a 10 ft head of water
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, What prevents a chemical sink from being damaged? - ANS Continually running water and
being manufactured out of chemical resistance materials
What is the purpose of a dip tube on a water heater? - ANS Transfers 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? - ANS 1 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? - ANS Resistance heating
elements
Primary purpose of vent line in a water closet is? - ANS Prevent loss from trap seal
What are the 2 primary water sources for public potable drinking water? - ANS Surface and
ground water
What is a cross connection? - ANS When 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? - ANS A 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? - ANS Trap Primer
What temperature is necessary for brazing and then adding the filler? - ANS 840 degrees
Fahrenheit
Three dimensional drawing of a plumbing system is called? - ANS Isometric
4 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
QUESTIONS AND ANSWERS GRADED A+
2025/2026
Travel - ANS The Distance from the initial offset to the second fitting
Advance - ANS Distance parallel to the pipes between the offset fittings
Offset - ANS Distance the pipe is offset from original position to new position
Rolling offsets formula - ANS Travel = Rise x 2 = Spread x 2
What are the three ways water is present? - ANS Solid - Ice
Liquid - Water
Gas - Steam
Pressure formula? - ANS Pressure= Head x .434
Head Formula? - ANS Head = Pressure x 2.3
Calculate the travel of 45 degree offset with a rise of 8" and a spread of 20" - ANS Travel =
21.54 x 1.414 = 30.45
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,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? - ANS Pressure = Head x .434
30 x .434 = 13.02 loss ( Uphill )
60 - 13 = 47
Answer = 47 psi
Volume of a pipe formula? - ANS .0408 x D^2 x L
Calculate the volume of a tank ( pipe ) 20 feet in height, with a diameter of 48" - ANS Answer
= 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" - ANS Answer = 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? - ANS Payment = Base x Rate
Rate formula? - ANS Rate = Payment divided by Base
You estimated a job at $2195, you need $900 upfront, what is the percent you collect upfront? -
ANS Answer = 41%
Rate = 900 divided by 2195 = 41%
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,When calculating offsets, what must be given? - ANS Offset(Base) and Advance(altitude)
When can you use PVC schedule 40 water pipe? - ANS Cold Water distribution systems
When can you use CPVC water pipe and fittings? - ANS Cold + Hot water distribution water
systems
What is the blue print symbol for cold water? - ANS Long line - long line - Long line -
Blue print symbol for hot water return line? - ANS Long 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? - ANS Fuel Gas Piping
What is Galvanic action? - ANS Electrolytic chemical reaction between dissimilar metals such
as copper and iron
What is the most common scales used in building drawings - ANS 1/8" = 1' and 1/4" = 1 '
Wall hung water closet bowls shall be? - ANS Rigidly supported by concealed metal supports
On a gas water heater, what is a thermocouple? - ANS Small electric generator
Difference between a sink and a lavatory? - ANS Sinks = functional units Lavatory = Washing
fixture
How are drainage and venting in buildings larger than 5 buildings larger than 5 stories high
tested? - ANS You test each 5 story section with a 10 ft head of water
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, What prevents a chemical sink from being damaged? - ANS Continually running water and
being manufactured out of chemical resistance materials
What is the purpose of a dip tube on a water heater? - ANS Transfers 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? - ANS 1 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? - ANS Resistance heating
elements
Primary purpose of vent line in a water closet is? - ANS Prevent loss from trap seal
What are the 2 primary water sources for public potable drinking water? - ANS Surface and
ground water
What is a cross connection? - ANS When 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? - ANS A 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? - ANS Trap Primer
What temperature is necessary for brazing and then adding the filler? - ANS 840 degrees
Fahrenheit
Three dimensional drawing of a plumbing system is called? - ANS Isometric
4 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
