Journeyman Plumbing
Travel - Answer- The Distance from the initial offset to the second fitting
Advance - Answer- Distance parallel to the pipes between the offset fittings
Offset - Answer- Distance the pipe is offset from original position to new position
Rolling offsets formula ...
distance from the initial offset to the second fit
distance parallel to the pipes between the off
distance the pipe is offset from original position
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Journeyman Plumbing
Journeyman Plumbing
Journeyman Plumbing
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Journeyman Plumbing
Travel - Answer- The Distance from the initial offset to the second fitting
Advance - Answer- Distance parallel to the pipes between the offset fittings
Offset - Answer- Distance the pipe is offset from original position to new position
Rolling offsets formula - Answer- Travel = Rise x 2 = Spread x 2
What are the three ways water is present? - Answer- Solid - Ice
Liquid - Water
Gas - Steam
Pressure formula? - Answer- Pressure= Head x .434
Head Formula? - Answer- Head = Pressure x 2.3
Calculate the travel of 45 degree offset with a rise of 8" and a spread of 20" - Answer- 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? - Answer- Pressure = 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" - Answer-
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" - Answer- 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? - Answer- Payment = Base x Rate
Rate formula? - Answer- Rate = Payment divided by Base
You estimated a job at $2195, you need $900 upfront, what is the percent you collect upfront? -
Answer- Answer = 41%
Rate = 900 divided by 2195 = 41%
,When calculating offsets, what must be given? - Answer- Offset(Base) and Advance(altitude)
When can you use PVC schedule 40 water pipe? - Answer- Cold Water distribution systems
When can you use CPVC water pipe and fittings? - Answer- Cold + Hot water distribution
water systems
What is the blue print symbol for cold water? - Answer- Long line - long line - Long line -
Blue print symbol for hot water return line? - Answer- 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? - Answer- Fuel Gas Piping
What is Galvanic action? - Answer- Electrolytic chemical reaction between dissimilar metals
such as copper and iron
What is the most common scales used in building drawings - Answer- 1/8" = 1' and 1/4" = 1 '
Wall hung water closet bowls shall be? - Answer- Rigidly supported by concealed metal
supports
On a gas water heater, what is a thermocouple? - Answer- Small electric generator
Difference between a sink and a lavatory? - Answer- Sinks = functional units Lavatory =
Washing fixture
How are drainage and venting in buildings larger than 5 buildings larger than 5 stories high
tested? - Answer- You test each 5 story section with a 10 ft head of water
What prevents a chemical sink from being damaged? - Answer- Continually running water and
being manufactured out of chemical resistance materials
What is the purpose of a dip tube on a water heater? - Answer- 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? - Answer- 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? - Answer- Resistance
heating elements
Primary purpose of vent line in a water closet is? - Answer- Prevent loss from trap seal
What are the 2 primary water sources for public potable drinking water? - Answer- Surface and
ground water
What is a cross connection? - Answer- 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? - Answer- 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? - Answer- Trap Primer
What temperature is necessary for brazing and then adding the filler? - Answer- 840 degrees
Fahrenheit
Three dimensional drawing of a plumbing system is called? - Answer- Isometric
Most common individual vent is called? - Answer- A continuous vent
A vertical pipe installed to provide circulation of air to and from the drainage system is called? -
Answer- A Vent Stack
Drain fixture unit rating for a kitchen sink? - Answer- 2 DFU
Drain Fixture Unit
The fitting that mounts under the drain plug on a bathtub waste and overflow is called? -
Answer- Waste Shoe
What is the maximum volume of water to flush a water closet? - Answer- 1.6 gallons
Energy Policy Act of 1992
What valve is used that has a flush device actuated by direct water pressure to supply a fixed
quantity of water for flushing devices? - Answer- Flushometer
What is the drainage pipe extending horizontally from a soil or waste stack or building drain,
with or without sections or branches? - Answer- Horizontal branch drain
How much does 1 foot of cubic water weigh? - Answer- 62 1/2 lbs
The distance between the crown weir and top of the trap is? - Answer- A Trap Seal
What is an Air Gap? - Answer- Unobstructed vertical space between the water supply and
flood rim of the receptacle
A valve that permits fluid flow in only one direction and close automatically to prevent back flow
is called? - Answer- A Check Valve
What is the maximum flush volume to a urinal? - Answer- 1 gallon per minute
How high is the water level in comparison to the overflow tube in a flush tank assembly? -
Answer- Level should be 3/4 below top of overflow tube
What is PE pipe? - Answer- Polyethylene Pipe
Example: CSST tubing, black pipe for wells and sprinkler systems, sold in coils
How is PE pipe joined together? - Answer- Plastic insert fittings and clamps
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