Coagulation
Turbidity is measured in what units
NTU
Pin-floc
2 main types of flow in a sedimentation tank
Rectilinear and Radial Flow
___ disk meters use a flat disk in a measuring chamber
Is a vacuum pump designed to pump water?
no
Which forces will pull particles together once they have been destabilized in the coagulation-flocculation process.
Van der Waals force
Name for very fine silts, bacteria and viruses that do not settle out.
Colloidal solids
The residue of solids and water that accumulates at the bottom of sedimentation basin is known as?
Sludge
____-____ meters are designed for service where daily use is relatively low but where very high flow rates may be required in an emergency.
Detector-Check
_____ into ____ or _____ into _____
water into air or air into water
_____- temperature water usually causes poorer coagulation and flocculation
A) Lower
B) Higher
Higher
Term for naturally repelling electrical force of particles of like charge?
Zeta potential
The ____ zone decreases the velocity of the incoming water and distributes the flow evenly across the basin
Influent Zone
Nickname for the body of most of the brass meters based on its shape
Turtle
pH is a measurement of the concentration of what ?
Hydrogen ions
pH of Ferric Chloride
2-3
5-15
50-60 degrees
Positive displacement meters are generally used for residences and small commercial services in sizes from __inches to __ inches
0.6 to 2"
how long should you use the eyewash station in a case of emergency
at least15
What pH range does Aluminum Sulfate work best?
5.8-8.5
Activated silica does what to ______ floc
strengthens it
Conventional sedimentation has a __ removal of Cryptosporidium oocysts.
A.) Less than 0.5 log
B.) 0.5 log
C.) 1.0 log
A
160
green, orange, blue