JOURNEYMAN PLUMBING EXAM SCRIPT 2025/2026
QUESTIONS AND ANSWERS GRADED A++
✔✔What is a cross connection? - ✔✔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? - ✔✔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? - ✔✔Trap Primer
✔✔What temperature is necessary for brazing and then adding the filler? - ✔✔840
degrees Fahrenheit
✔✔Three dimensional drawing of a plumbing system is called? - ✔✔Isometric
✔✔Most common individual vent is called? - ✔✔A continuous vent
✔✔A vertical pipe installed to provide circulation of air to and from the drainage system
is called? - ✔✔A Vent Stack
✔✔Drain fixture unit rating for a kitchen sink? - ✔✔2 DFU
Drain Fixture Unit
✔✔The fitting that mounts under the drain plug on a bathtub waste and overflow is
called? - ✔✔Waste Shoe
✔✔What is the maximum volume of water to flush a water closet? - ✔✔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? - ✔✔Flushometer
✔✔What is the drainage pipe extending horizontally from a soil or waste stack or
building drain, with or without sections or branches? - ✔✔Horizontal branch drain
✔✔How much does 1 foot of cubic water weigh? - ✔✔62 1/2 lbs
✔✔The distance between the crown weir and top of the trap is? - ✔✔A Trap Seal
,✔✔What is an Air Gap? - ✔✔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? - ✔✔A Check Valve
✔✔What is the maximum flush volume to a urinal? - ✔✔1 gallon per minute
✔✔How high is the water level in comparison to the overflow tube in a flush tank
assembly? - ✔✔Level should be 3/4 below top of overflow tube
✔✔What is PE pipe? - ✔✔Polyethylene Pipe
Example: CSST tubing, black pipe for wells and sprinkler systems, sold in coils
✔✔How is PE pipe joined together? - ✔✔Plastic insert fittings and clamps
✔✔How long is PVC guaranteed for? - ✔✔75 years
✔✔One pint of glue will fuse approximately how many 1 1/2" joints? - ✔✔50
✔✔Can PVC and ABS use the same PVC Glue? - ✔✔No, different types of plastic
✔✔Phantom lines on blueprints stand for? - ✔✔Moveable parts ( Phantom lines on blue
prints are used to display drain and vent lines)
✔✔On a blueprint, what does a " Key " tell you? - ✔✔Keys describe what lines or
specific abbreviations represent
✔✔The inside diameter of 1 1/2" schedule 40 pipe is? - ✔✔1.610"
✔✔A 3" short sleeve turn may NOT be used in what locations? - ✔✔In waste lines
where the change in flow is from horizontal to horizontal
✔✔What could upset a water filled trap? - ✔✔Back pressure and Siphonage will upset
the trap seal
✔✔Ejector pumps maybe be connected to a? - ✔✔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? - ✔✔From
Horizontal to Vertical
, *Double sanitary tee patterns shall not receive the discharge of back to back toilets
✔✔Drops for Lavatories are made up to be? - ✔✔30"
✔✔The blowout water closet is a commercial type water closet that depends on a large
jet of water directed into what part of the trap? - ✔✔Inlet
✔✔When threading 1" black steel pipe, the number of threads should be? - ✔✔11.5
✔✔A vent pipe that connects at the junction of 2 fixture drains and serves as a vent is
known as a? - ✔✔Common vent
✔✔A vent stack is connected to the waste stack at the lower end with a wye and? -
✔✔1/8 bend (45)
✔✔In a multi story building, the waste stack and and vent stack must reconnect with a
yoke vent every? - ✔✔5 branch intervals
✔✔Strainer baskets attached to the building storm drain to prevent debris from entering
the storm water systems are typically made of? - ✔✔Cast iron, Cast aluminum, plastic
✔✔A trap primer is a device which adds a small amount of water to the floor drain trap.
What is not a type of trap primer, Dispensing, Automatic, Water Saver or Vacuum
breaker trap primer? - ✔✔Dispensing trap primer
✔✔In a multi family dwelling, common fixtures are installed? - ✔✔Side to side
✔✔What is a prohibited trap if the inlet and outlet trap are in vertical alignment with
each other? - ✔✔A Bag Trap
✔✔What can be affected by a plumber when installing a plumbing system? - ✔✔Length
of piping
✔✔What receives only body liquid waste and conveys waste through a trap seal into a
sanitary drainage system? - ✔✔A urinal
✔✔How many bolts are required to anchor a siphon jet water closet bowl to the
supporting chair carrier? - ✔✔4 bolts
✔✔When installing a back flow preventer for lawn sprinklers, the back flow preventer
must be at least? - ✔✔6" above the highest sprinkler head
QUESTIONS AND ANSWERS GRADED A++
✔✔What is a cross connection? - ✔✔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? - ✔✔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? - ✔✔Trap Primer
✔✔What temperature is necessary for brazing and then adding the filler? - ✔✔840
degrees Fahrenheit
✔✔Three dimensional drawing of a plumbing system is called? - ✔✔Isometric
✔✔Most common individual vent is called? - ✔✔A continuous vent
✔✔A vertical pipe installed to provide circulation of air to and from the drainage system
is called? - ✔✔A Vent Stack
✔✔Drain fixture unit rating for a kitchen sink? - ✔✔2 DFU
Drain Fixture Unit
✔✔The fitting that mounts under the drain plug on a bathtub waste and overflow is
called? - ✔✔Waste Shoe
✔✔What is the maximum volume of water to flush a water closet? - ✔✔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? - ✔✔Flushometer
✔✔What is the drainage pipe extending horizontally from a soil or waste stack or
building drain, with or without sections or branches? - ✔✔Horizontal branch drain
✔✔How much does 1 foot of cubic water weigh? - ✔✔62 1/2 lbs
✔✔The distance between the crown weir and top of the trap is? - ✔✔A Trap Seal
,✔✔What is an Air Gap? - ✔✔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? - ✔✔A Check Valve
✔✔What is the maximum flush volume to a urinal? - ✔✔1 gallon per minute
✔✔How high is the water level in comparison to the overflow tube in a flush tank
assembly? - ✔✔Level should be 3/4 below top of overflow tube
✔✔What is PE pipe? - ✔✔Polyethylene Pipe
Example: CSST tubing, black pipe for wells and sprinkler systems, sold in coils
✔✔How is PE pipe joined together? - ✔✔Plastic insert fittings and clamps
✔✔How long is PVC guaranteed for? - ✔✔75 years
✔✔One pint of glue will fuse approximately how many 1 1/2" joints? - ✔✔50
✔✔Can PVC and ABS use the same PVC Glue? - ✔✔No, different types of plastic
✔✔Phantom lines on blueprints stand for? - ✔✔Moveable parts ( Phantom lines on blue
prints are used to display drain and vent lines)
✔✔On a blueprint, what does a " Key " tell you? - ✔✔Keys describe what lines or
specific abbreviations represent
✔✔The inside diameter of 1 1/2" schedule 40 pipe is? - ✔✔1.610"
✔✔A 3" short sleeve turn may NOT be used in what locations? - ✔✔In waste lines
where the change in flow is from horizontal to horizontal
✔✔What could upset a water filled trap? - ✔✔Back pressure and Siphonage will upset
the trap seal
✔✔Ejector pumps maybe be connected to a? - ✔✔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? - ✔✔From
Horizontal to Vertical
, *Double sanitary tee patterns shall not receive the discharge of back to back toilets
✔✔Drops for Lavatories are made up to be? - ✔✔30"
✔✔The blowout water closet is a commercial type water closet that depends on a large
jet of water directed into what part of the trap? - ✔✔Inlet
✔✔When threading 1" black steel pipe, the number of threads should be? - ✔✔11.5
✔✔A vent pipe that connects at the junction of 2 fixture drains and serves as a vent is
known as a? - ✔✔Common vent
✔✔A vent stack is connected to the waste stack at the lower end with a wye and? -
✔✔1/8 bend (45)
✔✔In a multi story building, the waste stack and and vent stack must reconnect with a
yoke vent every? - ✔✔5 branch intervals
✔✔Strainer baskets attached to the building storm drain to prevent debris from entering
the storm water systems are typically made of? - ✔✔Cast iron, Cast aluminum, plastic
✔✔A trap primer is a device which adds a small amount of water to the floor drain trap.
What is not a type of trap primer, Dispensing, Automatic, Water Saver or Vacuum
breaker trap primer? - ✔✔Dispensing trap primer
✔✔In a multi family dwelling, common fixtures are installed? - ✔✔Side to side
✔✔What is a prohibited trap if the inlet and outlet trap are in vertical alignment with
each other? - ✔✔A Bag Trap
✔✔What can be affected by a plumber when installing a plumbing system? - ✔✔Length
of piping
✔✔What receives only body liquid waste and conveys waste through a trap seal into a
sanitary drainage system? - ✔✔A urinal
✔✔How many bolts are required to anchor a siphon jet water closet bowl to the
supporting chair carrier? - ✔✔4 bolts
✔✔When installing a back flow preventer for lawn sprinklers, the back flow preventer
must be at least? - ✔✔6" above the highest sprinkler head
