CWS Water Chemistry & Contaminant Identification

Question 1

What is the ideal pH range for drinking water?

Accepted Answer

6.5 to 8.5

Answer

4.0 to 5.0

Answer

8.5 to 10.0

Answer

5.0 to 6.0

Question 2

Which of the following is a common water contaminant that affects taste and odor?

Accepted Answer

Iron

Answer

Calcium

Answer

Magnesium

Answer

Potassium

Question 3

What does TDS stand for in water testing?

Accepted Answer

Total Dissolved Solids

Answer

Total Dry Salts

Answer

Treated Discharge Substance

Answer

Thermal Dosing Scale

Question 4

What type of contaminant is lead in water classified as?

Accepted Answer

Heavy metal

Answer

Organic

Answer

Biological

Answer

Radiological

Question 5

Which method is typically used to remove chlorine from water?

Accepted Answer

Activated carbon filter

Answer

Reverse osmosis

Answer

UV treatment

Answer

Chlorination

Question 6

What is the effect of high nitrate levels in drinking water?

Accepted Answer

Methemoglobinemia (blue baby syndrome)

Answer

Iron deficiency

Answer

Bone weakening

Answer

Liver malfunction

Question 7

Which of the following is a biological water contaminant?

Accepted Answer

E. coli

Answer

Lead

Answer

Chlorine

Answer

Zinc

Question 8

What does a water softener primarily remove?

Accepted Answer

Calcium and magnesium

Answer

Sodium

Answer

Chlorine

Answer

Iron

Question 9

Which parameter indicates water's corrosive potential?

Accepted Answer

TDS and pH

Answer

Alkalinity

Answer

Nitrate

Answer

Color