module 1

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What contributes to turbidity in water treatment processes?

Detergents and soaps

Emulsifying agents

All of the above (correct)

Intrinsic color

Why are turbidity measurements important in water treatment when using UV irradiation for disinfection?

To measure the taste and odor of water

To ensure effective penetration of UV light (correct)

To identify the intrinsic color

To determine the true color of water

Which type of color is the most challenging to remove in water treatment?

Color contributed by suspended matter

Apparent color

Intrinsic color

True color (correct)

What does true color in water treatment refer to?

Color due to dissolved solids Signup and view all the answers

What does apparent color in water treatment indicate?

Color contributed by suspended matter Signup and view all the answers

What does a musty odor in domestic sewage indicate?

Anaerobic (septic) conditions Signup and view all the answers

What is a common method used in water treatment to remove taste and odor?

Oxidizing the materials Signup and view all the answers

What is the likely cause of water having both taste and odor?

Organic materials Signup and view all the answers

How does water temperature affect the efficiency of certain water treatment processes?

It increases the efficiency of coagulation and flocculation Signup and view all the answers

What does bitter-tasting water usually indicate?

Alkalinity Signup and view all the answers

Why is salty-tasting water commonly the result of metallic salts?

Presence of organic matter Signup and view all the answers

What is the purpose of feeding powdered activated carbon before the filter in water treatment?

To absorb components causing taste and odor Signup and view all the answers

What is the most effective means of removing solids from water in water treatment?

Filtration Signup and view all the answers

Which type of solids in water cannot be removed by filtration?

Dissolved solids Signup and view all the answers

What percentage of wastewater is composed of solids?

0.1% Signup and view all the answers

How is turbidity defined in the context of water quality?

Measure of light absorbed or scattered by suspended material Signup and view all the answers

Which factor influences the absorption and scattering of light in water due to turbidity?

Size and surface characteristics of suspended material Signup and view all the answers

What can contribute to turbidity apart from suspended material?

Microorganisms and vegetable material Signup and view all the answers