Journeyman Plumbing Questions With
Solutions 100% Solved
Calculate the travel of 45 degree offset with a rise of 8" and a spread of 20" Travel =
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? Pressure = Head x .434
30 x .434 = 13.02 loss ( Uphill )
60 - 13 = 47
Answer = 47 psi
Volume of a pipe formula? .0408 x D^2 x L
Calculate the volume of a tank ( pipe ) 20 feet in height, with a diameter of 48" Answer =
434,294,78 cu inches
* when we have cubic inches, must multiply volume by 231
(1880.06 gallons x 231)
, Journeyman Plumbing Questions With
Solutions 100% Solved
Calculate 1 1/2" pipe with an advance of 48" 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? Payment = Base x Rate
Rate formula? Rate = Payment divided by Base
You estimated a job at $2195, you need $900 upfront, what is the percent you collect upfront?
Answer = 41%
Rate = 900 divided by 2195 = 41%
When calculating offsets, what must be given? Offset(Base) and Advance(altitude)
When can you use PVC schedule 40 water pipe? Cold Water distribution systems
, Journeyman Plumbing Questions With
Solutions 100% Solved
When can you use CPVC water pipe and fittings? Cold + Hot water distribution water
systems
What is the blue print symbol for cold water? Long line - long line - Long line -
Blue print symbol for hot water return line? 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? Fuel Gas Piping
What is Galvanic action? Electrolytic chemical reaction between dissimilar metals such as
copper and iron
What is the most common scales used in building drawings 1/8" = 1' and 1/4" = 1 '
Wall hung water closet bowls shall be? Rigidly supported by concealed metal supports
, Journeyman Plumbing Questions With
Solutions 100% Solved
On a gas water heater, what is a thermocouple? Small electric generator
Difference between a sink and a lavatory? Sinks = functional units Lavatory = Washing
fixture
How are drainage and venting in buildings larger than 5 buildings larger than 5 stories high
tested? You test each 5 story section with a 10 ft head of water
What prevents a chemical sink from being damaged? Continually running water and being
manufactured out of chemical resistance materials
What is the purpose of a dip tube on a water heater? 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? 1 1/2 times the working pressure or 150 psi, which ever is
larger
Solutions 100% Solved
Calculate the travel of 45 degree offset with a rise of 8" and a spread of 20" Travel =
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? Pressure = Head x .434
30 x .434 = 13.02 loss ( Uphill )
60 - 13 = 47
Answer = 47 psi
Volume of a pipe formula? .0408 x D^2 x L
Calculate the volume of a tank ( pipe ) 20 feet in height, with a diameter of 48" Answer =
434,294,78 cu inches
* when we have cubic inches, must multiply volume by 231
(1880.06 gallons x 231)
, Journeyman Plumbing Questions With
Solutions 100% Solved
Calculate 1 1/2" pipe with an advance of 48" 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? Payment = Base x Rate
Rate formula? Rate = Payment divided by Base
You estimated a job at $2195, you need $900 upfront, what is the percent you collect upfront?
Answer = 41%
Rate = 900 divided by 2195 = 41%
When calculating offsets, what must be given? Offset(Base) and Advance(altitude)
When can you use PVC schedule 40 water pipe? Cold Water distribution systems
, Journeyman Plumbing Questions With
Solutions 100% Solved
When can you use CPVC water pipe and fittings? Cold + Hot water distribution water
systems
What is the blue print symbol for cold water? Long line - long line - Long line -
Blue print symbol for hot water return line? 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? Fuel Gas Piping
What is Galvanic action? Electrolytic chemical reaction between dissimilar metals such as
copper and iron
What is the most common scales used in building drawings 1/8" = 1' and 1/4" = 1 '
Wall hung water closet bowls shall be? Rigidly supported by concealed metal supports
, Journeyman Plumbing Questions With
Solutions 100% Solved
On a gas water heater, what is a thermocouple? Small electric generator
Difference between a sink and a lavatory? Sinks = functional units Lavatory = Washing
fixture
How are drainage and venting in buildings larger than 5 buildings larger than 5 stories high
tested? You test each 5 story section with a 10 ft head of water
What prevents a chemical sink from being damaged? Continually running water and being
manufactured out of chemical resistance materials
What is the purpose of a dip tube on a water heater? 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? 1 1/2 times the working pressure or 150 psi, which ever is
larger
