PART 02 Flashcards
To understand and to pass the quiz
General Type of Wells
Shallow Wells, Deep Wells
o Most common type
o Usually dug manually
o Around 15 m deep
Dug Well
Similar to dug well, but constructed using an auger driven in by hand or with power tools
Seldom hand driven
below 15 meters, but can reach 40+ meters with power tools.
Bored Well
o Use of extreme water
pressure so as not to—H–+i-+-‘ ‘
affect existing foundations in the vicinity
o Makes use of a suction pump above, while casing acts as the pump riser
o Used only where ground is relatively soft hence sometiems referred to as “Sand-Point Wells”
Jetted Well
o Dug with a sharp pointed hollow slotted iron rod and well screen
o Depths are from 10-15 meters
Driven Well
o Used for drilling oil
o Can reach up to 1000 m
Drilled Wells
2 Most Common Sources of Contamination
Septic Tank/leach fields
Livestock feedlots
In locating a well, location must not be ____________
100 ft. away from such pollution sources
Locate on _____________
higher ground
The ______ the well, the better for natural filtrattion
deeper
Well screens are made of _________ material like brass.
Non-Corrosive
______ material like stones and rock sediment provide additional screening
Natural
Basic types of Pumps
Piston Pump, Centrifugal Pump
- Water is sucked into a sealed vacuum by use of a piston
o Single
Piston Pump
- Water is drawn into the pump & discharged with a centrifugal force.
Centrifugal Pump
Piston pumps that operate with controlled speed. The discharge from a — is pulsating and changes only when the speed of the pump is changed. Sometimes an air chamber is introduced to regulate the pulsation.
Reciprocating Pumps
______ are centrifugal pumps typically used for drawing water up from a well.
Jet Pumps
are piston pumps that make use of a pump drivers
can discharge from 900 to 1200 GPM
are more efficient for viscous fluids
Rotary Pump
are designed to be fully immersible within a tank or other media storage receptacle.
* Many common types of pumps can be designed by manufacturers to be –
e. Sump Pumps
Submersible Pumps
are used in applications where excess water must be pumped away from a particular area.
Sump pumps
are centrifugal pumps used for large applications because of their multiple impellers
can discharge up to 2000 GPM
- Turbine Pumps
Types of tanks for domestic use
Overhead tanks, Cisterns, Pressure Tanks, Hot Water Tanks
- Does not have any pressure concerns but relies on gravity to supply water to fixtures below
Overhead Tanks
- Usually built of reinforced concrete underground and connected with a pump
Cisterns
