WTO Water Quality & Treatment Principles

Question 1

What is the primary purpose of coagulation in water treatment?

Accepted Answer

To destabilize suspended particles

Answer

To remove dissolved gases

Answer

To add essential minerals

Answer

To disinfect water

Question 2

Which method is commonly used to disinfect water in water treatment plants?

Accepted Answer

Chlorination

Answer

Filtration

Answer

Ultraviolet light

Answer

Sedimentation

Question 3

What is the key function of flocculation in water treatment?

Accepted Answer

To promote particle aggregation

Answer

To add chlorine

Answer

To remove dissolved solids

Answer

To remove bacteria

Question 4

Why is pH adjustment important in water treatment?

Accepted Answer

To enhance the efficiency of coagulation

Answer

To increase water temperature

Answer

To improve taste

Answer

To remove chlorine

Question 5

What is the function of activated carbon in water treatment?

Accepted Answer

To adsorb organic compounds and odors

Answer

To remove heavy metals

Answer

To filter out suspended solids

Answer

To increase water hardness

Question 6

What is the primary function of a sedimentation tank in water treatment?

Accepted Answer

To allow suspended particles to settle

Answer

To add chemicals to the water

Answer

To filter out bacteria

Answer

To disinfect water

Question 7

What is the effect of hard water on the treatment process?

Accepted Answer

It causes scaling in pipes and equipment

Answer

It makes water more acidic

Answer

It improves disinfection

Answer

It enhances coagulation

Question 8

What is the purpose of using ozone in water treatment?

Accepted Answer

To disinfect water and remove organic pollutants

Answer

To increase water hardness

Answer

To improve taste

Answer

To add minerals to the water

Question 9

What is the role of a reverse osmosis membrane in water treatment?

Accepted Answer

To remove fine particulates and contaminants

Answer

To remove dissolved gases

Answer

To disinfect the water

Answer

To add essential nutrients