Water filtration is a chemical process of separating suspended and colloidal particles from waste by
passing the water through a granular material. This process involves straining, settling, and adsorption.
Question options:
True
False
Vie
w
Feedback
Question 2 points
Cholera is an acute, diarrheal illness caused by infection of the intestine with the bacterium
Vibrio cholerae.
Question options:
True
False
Question
points
3
The corrosion of toxic metal pipes made from ____ creates a serious health hazard. ____ tends to
accumulate in the bones of humans and animals. Signs of ____ intoxication include gastrointestinal
disturbances, fatigue, anemia, and muscular paralysis. It is a corrosion byproduct from high ____ solder
joints in copper and ____ piping. (All blanks are the same word.)
Question options:
pvc
sulfur
lead
graphite
Question
points
4
___________ is of concern in domestic water consumption because the water increases soap
consumption, leaves a soapy scum in the sink or tub, can cause water heater electrodes to burn out
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, quickly, can cause discoloration of plumbing fixtures and utensils, and is perceived as being less desirable
water.
Question options:
Hardness
Odor
Chlorine
Oxidation
Question
points
5
The primary factors affecting corrosion are __________________.
Question options:
velocity of water in pipes, hardness (calcium), dissolved oxygen, and total dissolved
solids
temperature, velocity of water in pipes, and carbon dioxide
temperature, pH, carbon dioxide, and alkalinity
pH, alkalinity, hardness (calcium), dissolved oxygen, and total dissolved solids
Question
points
6
Arsenic is not a natural contaminant in either surface waters or groundwaters, and the MCL of
0.005 mg/L in source waters is rarely exceeded.
Question options:
True
False
Question
points
7
The yield for a particular well is 280 gallons per minute (gpm). If the drawdown for this well is
23 feet, what is the specific yield in gpm/ft?
Question options:
24 gpm/ft
12 gpm/ft
6,440 gpm/ft
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