definition
Cavitation
The formation and collapse of a gas pocket or bubble on the blade of an impeller impeller
what was my favorite the concert i ever went too
Pink 2024 commonwealth stadium
pump is most commonly used in wastewater lift stations?
centrifugal pump
Why are air release valves installed on force mains
release entrained air that is trapped in the pipe
List reasons why a lift station would be installed rather than continuing with a gravity line
1. Excavation costs for gravity system too high
2. Soil type/stability unsuitable for trenching
3. Groundwater table too high
4. Present flows not sufficient to justify large trunk sewers
Lift Station
A Pumping station that raises wastewater from a lower elevation to a higher elevation.
my favorite band
van halen
Why are complete lift station failures not common?
Lift stations are designed with multiple pumps and reliable backup power supplies
where are air release valve located
high points of force main
List factors used to determine the level of O & M requirements of a collection system.
Amount of use (flows, volumes)
System Age
Materials used (pipe type)
Amount of automation
Topography
Number of manholes, lift stations, ARV, PRV
Wet well
tank in which wastewater is held
what are my dogs name
Bruno
Shelby
When lift stations are being designed and planned, there are several factors that need to be considered in regards to the public in the area ( three i teams )
Noise level
Odors
Overall appearance
There are several factors that will determine the size and type of lift station that will be built. Please list three of them:
1. Volume of wastewater collected
2. Elevation required to lift the wastewater
3. Length of force main downstream
List the three general categories of of health and safety hazards in wastewater collection.
Accidents
Exposures
Work environment/conditions
Volute Case
The spiral shaped case that surrounds a impleller
what is my ring tone
funky town
describe a Wet well lift station
wastewater, pumps, and controls all located in or above wet well
Name several factors todetermine the size and type of lift station that will be built .Please list three of them
Volume of wastewater collected
Elevation required to lift the wastewater
Length of force main downstream
Why should equipment manufacturer’s operation and maintenance recommendations be followed, especially during the first year?
To Maintain minimum warranty requirements
Pneumatic Ejector
A device for raising Wastewater by use of compressed air.
who is my doppelganger
Mark Rufflo
describe-Dry well
pumps and controls all located in a separate dry chamber adjacent to the wet well
List 4 reasons why a lift station would be installed rather than continuing with a gravity line:
1.Excavation costs for gravity system too high
2. Soil type/stability unsuitable for trenching
3. Groundwater table too high
4. Present flows not sufficient to justify large trunk sewers
Give three reasons why every lift station should have a sign-in log.
Identify who was there and when
Track work/maintenance completed
for for governing body (AB Environment etc)
packing
one method used to control leakage around the shaft of a pump
what year did i start at nait
2015
What type of documentation must be prepared by the design engineer or contractor and given to the operator prior to the start up of a new lift station?
O & M Manuals
Which type of check valve is most commonly used in a lift station?
swing check valve
What is the most important rule that always must be considered when visiting a lift station?
Always have two operators for LS visits
Mechanical Seal
methods used to control leakage around the shaft of a pump, please l
who is my favorite super hero
Aqua man
what is a close-coupled pump and a flexibly coupled pump:
Motor and pump are separate units, shafts connected via flexible coupling
What is Close-Coupled pump
Motor and pump are a single unit, share a common shaft
Most lift stations are equipped with what type of electrical power?
Three phase