Treatment Process
In direct filtration, this step is omitted from the conventional treatment process
Sedimentation
The best location when reading laboratory glassware
the meniscus
A type of corrosion when to dissimilar metals come in to contact
galvanic
Black stains on plumbing fixtures can be attributed to this
manganese
Theis is the first thing you should do prior to changing the packing on a pump
De-energize. Lock out/tag out
The difference between the amount of chlorine added and chlorine residual
Chlorine demand
This is the amount of time a lead and copper sample must remain stagnant prior to taking
6 hours
the depression around the radius of a well where water is drawn from when pumping
cone of depression
water that causes a large amount of soap to lather
hard water
This type of fire extinguisher is to be used on electrical fires
Class C
Chloramines are created by adding this to chlorine
ammonia
Uncombined chlorine that remains in the water after chlorine has been applied and allowed to react.
Free chlorine
This is pressure due to the elevation of water
Static head
Harness is water is caused mainly by this
Calcium & magnesium
The amount of time you have to notify customers of a Tier 1 violation
24 hours
This process kills or deactivates most pathogen
disinfection
This sample tests results that are averaged together
grab samples
In a centrifugal pump, this device applies even pressure to the packing for a tight seal around the pump shaft
mechanical seal
This chemical is added to reservoirs to control algae
copper sulfate
In degrees Fahrenheit, this is the range of temperature that fusible plugs on chlorine cylinders are designed to melt.
157-162
These devices uniformly disperse the chlorine solution into the main stream of water
diffusers
Optimum coagulant dosage can best be determined by this
jar testing
In a pump, the purpose of this ring is to distribute lubrication to the packing
lantern ring
This was formerly known as blue-green algae
cyanobacteria
This species causes typhoid
Salmonella