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Book 1 Ch 4 - Sedimentation Practice Quiz

front 1

To control the settling characteristics of the suspended particles, what should the operator adjust?

back 1

The chemical coagulant dose and the coagulation flocculation process

front 2

The tendency of the water to flow at the inlet velocity straight through the
basin is known as what?

back 2

Short circuiting

front 3

Which statement is true about treating colder water?

back 3

The colder the water, the longer it takes particles to settle out

front 4

Floc carryover from the sedimentation basin will cause what problem?

back 4

Premature clogging of the filters and degraded finished water quality

front 5

A settling tank at a water plant is 125 feet long, 65 feet wide and operates at a depth of 12.5 feet. How many gallons does the tank contain?

back 5

759,688 gallons

front 6

What is the purpose of the sedimentation process?

back 6

Remove suspended solids that are denser than water and to reduce the load on the filters

front 7

As water temperature decreases, the operator should be prepared to take what action to increase efficiency of the sedimentation process?

back 7

Reduce the flow through the basin to increase detention time

front 8

What is the name of the unit that combines coagulation, flocculation and sedimentation processes into a single basin and may be either rectangular or circular in shape?

back 8

Upflow, solids contact clarification

front 9

During normal operation of the sedimentation process, operators will
monitor what water quality parameters?

back 9

Turbidity and temperature

front 10

A circular clarifier is 98 feet in diameter with an operating depth of 11 feet. Calculate the surface area

back 10

7,539 sq ft