JOURNEYMAN PLUMBING EXAM
QUESTIONS WITH CORRECT ANSWERS
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
How long is PVC guaranteed for? - Answer-75 years
One pint of glue will fuse approximately how many 1 1/2" joints? - Answer-50
Can PVC and ABS use the same PVC Glue? - Answer-No, different types of plastic
Phantom lines on blueprints stand for? - Answer-Moveable parts ( Phantom lines on
blue prints are used to display drain and vent lines)
On a blueprint, what does a " Key " tell you? - Answer-Keys describe what lines or
specific abbreviations represent
The inside diameter of 1 1/2" schedule 40 pipe is? - Answer-1.610"
A 3" short sleeve turn may NOT be used in what locations? - Answer-In waste lines
where the change in flow is from horizontal to horizontal
What could upset a water filled trap? - Answer-Back pressure and Siphonage will upset
the trap seal
Ejector pumps maybe be connected to a? - Answer-WYE fitting in the building drain
Single sanitary Tees, double sanitary Tees, and quarter bends may be used in vertical
positions of drainage lines only where the direction of the flow is? - Answer-From
Horizontal to Vertical
QUESTIONS WITH CORRECT ANSWERS
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
How long is PVC guaranteed for? - Answer-75 years
One pint of glue will fuse approximately how many 1 1/2" joints? - Answer-50
Can PVC and ABS use the same PVC Glue? - Answer-No, different types of plastic
Phantom lines on blueprints stand for? - Answer-Moveable parts ( Phantom lines on
blue prints are used to display drain and vent lines)
On a blueprint, what does a " Key " tell you? - Answer-Keys describe what lines or
specific abbreviations represent
The inside diameter of 1 1/2" schedule 40 pipe is? - Answer-1.610"
A 3" short sleeve turn may NOT be used in what locations? - Answer-In waste lines
where the change in flow is from horizontal to horizontal
What could upset a water filled trap? - Answer-Back pressure and Siphonage will upset
the trap seal
Ejector pumps maybe be connected to a? - Answer-WYE fitting in the building drain
Single sanitary Tees, double sanitary Tees, and quarter bends may be used in vertical
positions of drainage lines only where the direction of the flow is? - Answer-From
Horizontal to Vertical
