Water Pollution

Water Pollution
Cyanides are toxic to all biological life, prevents enzyme action, as well as immobilize the
Lungs
Skin
Nervous System
Heart
Author: rikazzz Comment
Water Pollution
Effluents that comes from various industries such as food and drugs is known as
Industrial Pollution
Natural pollution
Mining Pollution
Municipal pollution
Author: rikazzz Comment
Water Pollution
Presence of hydrogen sulphide indicates anaerobic
Decomposition
Eutrophication
Degradation
Biodegradation
Author: rikazzz Comment
Water Pollution
Addition of hydrogen and removal of oxygen, known as
Reduction
Oxidation
Suspended solids
Dispersion
Author: rikazzz Comment
Water Pollution
Which parameter is very important in sewage treatment?
Temperature
Chemical
Decomposition
All of them
Author: rikazzz Comment
Water Pollution
‘Oil’ is a mixture of different
Parafins
Hydrocarbons
Nutrients
Gases
Author: rikazzz Comment
Water Pollution
How much BOD reduces in preliminary treatment ?
15 to 30%
17 to 60%
19 to 80%
10 to 90%
Author: rikazzz Comment
Water Pollution
Waste water contains a variety of microorganism, includes: bacterias and
Fungi
Worms
Rotifers
Bats
Author: rikazzz Comment
Water Pollution
Inorganic salts, mineral acids and metal compounds are:
Inorganic pollutants
Organic pollutants
Air pollution
All of them
Author: rikazzz Comment
Water Pollution
Which solids remain floating in sewage ?
Suspended solids
Colloidal Solids
Dissolved solids
Settatleable solids
Author: rikazzz Comment

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