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What is the approximate total volume of a circular tank in gallons, if it is 30
feet in diameter, and 15 feet deep
79,300 gallons
You are using a chlorinator to provine a dosage of 4.0 mg/L. If the daily
Water
usage is 750,000 gallons, the gas chlorinator feed rate should be set at
____________ pounds per day.
25
,One gallon of water weighs
8.34 lbs.
One foot of water inside a storage vessel will raise a pressure gauge at
the bottom of the vessel by
0.433 lbs. (1 ft. Water creates 0.433 psi of pressure)
A raw water intake structure may not be constructed with _ feet of a boat
ramp, dock, or marina
1,000 feet
Common types of pumps for use in water wells are
Vertical turbine and submersible
_ ____ is the natural exchange of water between the earth and air
The hydraulic cycle
If and when a health hazard contamination event occurs in a public
water System, the operator must contact the state regulatory authority
within __________ hours by telephone
24 hours
,Potable water is that of
Maintained at adequate pressure, pathogen free, and contains a chlorine
residual
Excessive nitrates in drinking water can care a condition that affects
infants under the age of 6 months, this condition known as
Blue baby
In surface water treatment the process of causing the fine particles in
water to join together to form larger heavier particles that settle in a
clarifier is called
Coagulation
The test commonly used to determine the chemical dosage for the
surface water plants is the test
Jar
Suspended solids are the solids portion that
Cause mudballs and filter plugging
A public Water system is required to take samples of water for
bacteriological analysis. The organism that is used as an indicator is
Coliform
, Chisine dosage is demand plus desired
Residual
A storage vessel that is the same diameter from the ground to the top
and is more than 20 feet but less than 80 feet tall is called a
Stand pipe
Potable water must be stored at an elevation at least 80.85 feet above
the highest known connection to provide the minimum operating
pressure of
_____________________________________________________________________ ps
i
35
Water tank that uses compressed air over water to provide pressure is
called a
Hydro pneumatic tank
According to the lead and copper rule, pipe and fittings may not
contain more than lead or solder and flux may not contain more than
0.2% lead
8.0%