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EV350 - WPR 2 QUESTIONS AND CORRECT DETAILED ANSWERS (QUICK REVISION)

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EV350 - WPR 2 QUESTIONS AND CORRECT DETAILED ANSWERS (QUICK REVISION)

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EV350 - WPR 2 QUESTIONS AND
CORRECT DETAILED ANSWERS
(QUICK REVISION)

What are some of the federal laws applicable to drinking water

treatment? - CORRECT ANSWER (S) -Safe Drinking Water Act (SDWA)




Things inactivated/removed in the drinking water process - CORRECT

ANSWER (S) -- pathogens/bacteria

- color & turbidity

- taste & odor




Facts about turbidity - CORRECT ANSWER (S) -- Occurs due to particles

in suspension

, - Leads to increased health risk (microorganisms can attach to colloids)

- Makes water appear hazy

- Regulated in water treatment plants




Key Properties of a Coagulant - CORRECT ANSWER (S) -- Insoluble in

neutral pH range

- nontoxic

- trivalent cation




Key Considerations of Flocculation - CORRECT ANSWER (S) -- Brings

particles together so they collide, stick, & grow

- Provides enough mixing to affect contact

- too much mixing will shear flocs

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