Chapter 2 Flashcards
What should velocity of collection system be.
2 feet per second.
How should wastewater systems be designed.
Wastewater design should be designed to convey the estimated peak flow from its service area when the area has reached maximum population.
When is scouring velocity reached?
A scouting velocity should be reached during peak flows, should measured in the field and can be measured using dyes or floats.
What are floats and dyes used for.
To measure velocities.
When should cleaning operations be scheduled?
Cleaning operations should be scheduled during hours of sufficient flow.
What is a building sewer
Connects a buildings internal wastewater draining system to the street sewer.
What is the minimum slope of gravity sewer lines?
.25
Define plan. View and profile view.
Plan view is top view.
Profile view is the side view of plans.
What are backflow preventers used for.
Used to stop the accidental backflow or reverse flow of wastewater into buildings from the sewer.
What are flusher branches.
Used to introduce large volumes of water in the upper end of lateral and branch sewer.
Manhole definition.
Installed in laterals to introduce persons, equipment and materials into sewers for inspection and maintenance.
What is the spacing of manholes
300 to 500 feet
What is a flow regulator used for?
To divert the flow of wastewater from one sewer line to another. Also known as a plug.
What is the scouring velocity for cleaning.
Optimal is 2 feet per second.
Types of rigid pipe.
A.C. Cast Iron RCP NRCP Prestrezsed pressure pipe Vitrified Clay Pipe
