Flashcards in Operations Resource Management, Water and Wastewater Deck (28)
What are the two purposes of fire hydrants?
Fire Fighting and Flushing the system.
Why is ti important to flush a water system?
To remove sediments that build up over time.
How many times should the system be flushed?
Twice per year ( Spring / Fall )
What are the two functions of valves?
To shut down hydrants and shut down mains
What purpose does storing water serve?
It enhances water pressure and meets the NJDEP requirements for one days storage to be stored.
Name three ways water may be stored?
An elevated tank, a reservoir or ground storage
There three types of pumps, name them.
Vertical, turbine and split horizontal
What is the purpose of well or high service pumps?
For pumping large amounts of water to higher elevations
When do pumps stop and start?
As water rises and falls in the storage tank
The purpose of a meter is to?
monitor usage for the purpose of billing and regulate consumption
Why is it important to eliminate dead ends?
To provide better circulation and to reduce areas to be flushed regularly
You can eliminate dead ends by
Looping the lines. This may require the use of easements
Rusty water does the following to the consumer aesthetically
Stains fixtures, Stains Clothes and Clogs Screens and Aerators
The purposes of Manholes are
Inspection, Testing, Sampling and Maintenance
How are Manholes constructed?
Brick, Blocked and Poured
Name five types of maintenance equipment
Sewer Jetter, Sewer Rodding Machine, Sewer Inspection Television Systems, Vacuum Trucks, Small Rotary cable units, Air Bags for stopping flow or Pneumatic plugs,Shovels, Brooms, scoop and buckets
Name five types of pipes used in sewer construction.
Clay or Terracotta
Asbestos Concrete Pipe (ACP or Transite)
Reinforced Concrete Pipe (RCP)
Polyvinyl Chloride (PVC)
Porous Wall Pipe
What causes sewer pipe failures?
Roots, Age and Improper Bedding
A Fernco Fitting is?
A rubber fitting that connects two unlike or like types of pipes
What chemicals may be used in sewer maintenance?
Sewer Compound ( Metal Chip )
Copper Sulfate ( Root Control )
Sewer Maintenance Equipment May include?
Sewer Inspection System
Older Wastewater piping is generally replaced with?
Durable Polyethylene piping
Factors in the design of a sewer system include
Areas to be served ( present and future )
Population and industry ( present and future )
Quantity of sewage carried
Character of the sewage ( fresh grey or septic black )
How often should your sewer system be maintenance?
Once per year
Sewer failures are caused by three main sources, what are they?
Misuse, Faulty Engineering or Poor Construction
Name the types of breaks in sewer lines
Contraction or Shearing
Horizontal or Lateral Break
Confined Space Entry refers to?
A safety program that insures the safety of a person entering a space not intended for human habitation