PLUMBING EXAM 1 2025/2026 QUESTIONS WITH 100%
CORRECT ANSWERS
Trap - curved pipe in drain line that Traps unwanted gasses from drainage pipe.
Leader - a pipe that Carries storm water away from drain and into horizontal storm drain.
Cleanout - pipe with cap that Allows easy access to unclog sewer lines.
Soil percolation test - measures how quickly water drains through soil and ensures that septic tank
wont flood or pollute groundwater
VTR - Vent through roof
OSST - On site sewage treatment (septic tanks)
Stack - vertical pipe that runs from the roof down through the house and connects a home plumbing
system to the sewer line or septic tank
Vent - vertical pipe that Gets rid of gases and ensures gravity flow of wastewater.
RO - Reverse osmosis (process that cleans water)
What fixtures require traps? - All of them.
How much fall should you have from your soil away from house? - 6"
Difference between grey water and blackout water. - Grey water - has soapy water and can be reused
Blackout water - Has human fecal matter
Do all fixtures requiere etxernal trap? - no
water clostes, urinals, floor drains etc. do not
, Where do you want cleanouts located? - Bottom of vertical stack and upper end of horizontal drain.
within 5' of exit of a building
Good way to reuse grey water - -Irrigation and water plants
whats the maximum amount of water closets that can be used for a 3" water line? - 2 water closets
only
What pipe size is needed for three or more water closets? - A 4-inch pipe size line is needed for three
or more water closets.
Another name for secondary drains - scuppers
what is the minimum pipe size for a water closet - 3"
sewage ejection - procces of a device that lifts sewage by air pressure
sleeves - covering that protects pipes and ensures they pas smoothly through surfaces
DWV - Drain waiste vent
Fixture branch - water supply pipe connecting one or more fixtures to main water supply system
water pressure - driving force behind fluid flow
Thermal expansion - water pressure to high, it bends the pipe
Riser - transfers water to fixtures (pipes that go up)
Fixture - Plumbing component that uses water from pipes
CORRECT ANSWERS
Trap - curved pipe in drain line that Traps unwanted gasses from drainage pipe.
Leader - a pipe that Carries storm water away from drain and into horizontal storm drain.
Cleanout - pipe with cap that Allows easy access to unclog sewer lines.
Soil percolation test - measures how quickly water drains through soil and ensures that septic tank
wont flood or pollute groundwater
VTR - Vent through roof
OSST - On site sewage treatment (septic tanks)
Stack - vertical pipe that runs from the roof down through the house and connects a home plumbing
system to the sewer line or septic tank
Vent - vertical pipe that Gets rid of gases and ensures gravity flow of wastewater.
RO - Reverse osmosis (process that cleans water)
What fixtures require traps? - All of them.
How much fall should you have from your soil away from house? - 6"
Difference between grey water and blackout water. - Grey water - has soapy water and can be reused
Blackout water - Has human fecal matter
Do all fixtures requiere etxernal trap? - no
water clostes, urinals, floor drains etc. do not
, Where do you want cleanouts located? - Bottom of vertical stack and upper end of horizontal drain.
within 5' of exit of a building
Good way to reuse grey water - -Irrigation and water plants
whats the maximum amount of water closets that can be used for a 3" water line? - 2 water closets
only
What pipe size is needed for three or more water closets? - A 4-inch pipe size line is needed for three
or more water closets.
Another name for secondary drains - scuppers
what is the minimum pipe size for a water closet - 3"
sewage ejection - procces of a device that lifts sewage by air pressure
sleeves - covering that protects pipes and ensures they pas smoothly through surfaces
DWV - Drain waiste vent
Fixture branch - water supply pipe connecting one or more fixtures to main water supply system
water pressure - driving force behind fluid flow
Thermal expansion - water pressure to high, it bends the pipe
Riser - transfers water to fixtures (pipes that go up)
Fixture - Plumbing component that uses water from pipes
