Basic Water
Potable water means the water is
a. maintained at adequate pressure
b. pathogen free
c. contains a chlorine residual
d. all of the above
e. both B & C.
What is all of the above (d).
Term that describes the ease with which water flows through an aquifer.
What is permeability.
Number of bacteriological samples need per 1000 ft?
What is 1.
COD is what?
What is chemical oxygen demand.
When backwashing a filter, the media should be expanded by ____________%?
What is 30% - 50%.
Livestock and septic tanks must be no closer than _______ feet to a public water well.
What is 500'.
Coliform bacteria present in water indicates?
What is fecal contamination.
When back-filling and compacting a pipe trench, the individual “back lifts” should not exceed _______".
What is 6".
Two types of disinfection methods in WW treatment.
What are chlorine, UV and ozone.
The primary purpose of Sedimentation Basins is __________?
What is to reduce the silt loads on treatment facilities.
A gallon of water weighs.
What is 8.34 pounds.
What is the demand if chlorine dosage is 4.6 mg/L and the residual at the far end of the system is 0.3.
What is 4.3 mg/L.
Minimum chlorine residuals in the distribution system?
What is .2 for free chlorine and .5 for total.
Annual report if you have more than 10,000 gallons of hazardous materials on site.
What is Tier II.
Any water system that provides the public with water for human consumption or has 15 service connections or serves at least 25 individuals 60 days out of the year is considered a ______________________?
What is Public Water System.
Your primary ground water well is responsible for 1,330,000 gallons of production per day on the average.
What is the approximate production in gallons per minute for this well?
What is 923 gpm.
1 cubic foot of water equals:
a. 8.34 gallons
b. 3.14 gallons
c. 7.48 gallons
d. 2.31 gallons
What is 7.48 gallons
Amount of detention time in sedimentation basins to allow floc to settle.
What is 6 hours.
What is sedimentation.
Excessive nitrates in drinking water can cause a condition that affects infants under the age of 6 months. Condition is known as _____________?
What is blue babies.
Total capacity of ground storage tank in gallons: diameter of 50 feet and 32 feet high.
What is 469,744 gallons.
What is the equation to find the volume of water in 800ft of 12in water main?
What is 3.14 X .5 X .5 X 800 X 7.48 = 4,697.44gal
Typical pH of an influent entering the WWTP will range from?
What is 6.5 - 8.0.
The maximum filtration rate for a rapid sand filter?
What is 2 gal/sq ft/min.