Water Quality

What is the main process that describes the continuous movement of water on Earth?

• Hydrological cycle

• Water recycling

• Water filtration

• Water distribution

Which of the following is not a source of water impurities?

• Condensation

• Surface contact

• Industrial waste

• Evaporation

Impurities in water can be both suspended and dissolved.

• True

• False

Which type of impurity is larger than molecular size and visible in water?

• Suspended solids

• Colloidal substances

• Dissolved materials

• Organic ions

Colloids exhibit characteristics of both suspended and dissolved substances.

• True

• False

Turbidity is a measure of how much ______ is scattered or absorbed in water.

• Light

• Heat

• Sound

• Electricity

Which of the following is used to measure turbidity?

• NTU meter

• Thermometer

• pH meter

• COD analyzer

The color of water caused by dissolved substances is called:

• True color

• Apparent color

• Neutral color

• Suspended color

Which physical parameter is measured in True Color Units (TCU)?

• Color

• Turbidity

• Taste

• Temperature

High suspended solids in water can cause aesthetic problems and disease risks.

• True

• False