The Last 111 Test: DWV Systems (Part 2) Flashcards
DWV branches are connected to the main DWV system using…
Sanitary Fittings
What describes the attachment of one trap to another trap in a water closet?
Double Trapping
What is the substance that settles on the bottom of holding tanks called?
Sludge
The underground drain pipe that carries waste from the building to the public sewer is called a(n)…
Building Sewer
What allows pipes made from different materials to be connected?
Adapters
The flow from two opposite runs into a single run of pipe are collected and combined in a(n)…
Double 1/4 Bend
Bend fittings with a short radius that are used at the base of a DWV stack are called…
Short Sweep 1/4 Bends
What fitting, in cold climates, can prevent vent openings from closing as a result of frozen condensation in pipes?
Sanitary Increaser
What fitting may not be used in drainage systems because their design can cause waste to collect in the fitting?
Vent Tee
What fitting has a sharp turning radius that severely restrict the flow of materials, making their use allowable only in vent lines?
Vent Ell
What is used to keep undesirable or hazardous materials from entering a building drainage system, a public or private sewer, or sewage treatment plant or process?
Interceptor
Vertical branch lines that intersect with horizontal branch lines must be joined at an angle with a(n)…
Sanitary Wye
What fittings serve as locations to conduct leakage tests?
Test Tees
What collects on fittings, especially on iron or steel, as a result of metal corrosion?
Pipe Scale
Horizontal branch lines that intersect with other horizontal branch lines at a 90 degree angle are connected using a(n)…
Sanitary Combination
What is one of the four factors that must be considered when determining the intervals for manholes?
Elevation
What works with gravity to move solid and liquid waste through DWV systems?
Slope
What is another name for slope?
Percent of Grade
What strains the wastewater before it enters the drainage piping?
Fixture Drains
What is one or more lengths of pipe that continue in a straight line called?
Run
The pressure inside the DWV piping that is greater than atmospheric pressure is called…
Backpressure/Backflow
An access point to all parts of the drainage system for the removal of blockages is called a(n)
Cleanout
What allows smaller lines to be connected to a bend?
Side Inlet
What is the section of stack that connects branch pipes to the main DWV stack called?
Branch Interval
An imbalance of in pressure between the inside and outside DWV piping can cause…
Siphonage
What does code generally require the use of at the base of stacks?
Long Sweep
What is the general term for most vertical line including offsets offsets of soil, waste, vent, or inside conductor piping?
Stack
A one or two-piece trap with a union nut is called a(n)
P-Trap
A circuit of piping inside a building is call a(n)
DWV System
What has been replaced by the P Trap due to improvements in plumbing.
S Trap
Porous material caught in a trap can cause a seal to be broken by…
Capillary Attraction
The infrequent use of a trap can cause what of the seal?
Evaporation
What are devices used to connect pipe in DWV systems called?
Drainage Fittings
The upper ends of vents are joined to the top of soil and waste stack by…
Sanitary Combinations
Connecters that may be used in place of vent branches are called…
Inverted Wyes
The level line in which water tends to flow through the trap is the…
Hydronic Gradient
What is the speed at which waste flows through pipes called?
Velocity
The fall in a horizontal pipe from crown weir to vent must not exceed…
One Pipe Diameter
