Sewage Treatment

Q.

Distinguish between sewage and effluent.

Q.

What is meant by bioaccumulation ?

Q.

What are the different types of inorganic and organic impurities generally present in sewage?

Q.

State if the statement is true or false.

Sewage is a solid waste which is known to cause soil pollution and water pollution.

1. True
2. False

Q.

State the cause of accelerated eutrophication.

Q. The content of biodegradable substances in water is expressed by a special index called

1. Litmus
2. Biological Oxygen Demand
3. Parts per million
4. mm per Hg

Q.

Define Sewage.

Q.

Oils and fats should not be released in the drain.

1. True
2. False

Q. What is added to the water treatment tank to settle the colloidal particles?

1. Only alum
2. Only lime
3. Alum and lime
4. Potash

Q.

In a filtration plant, water is filtered using layers of

1. clay and fine gravel

2. sand and clay

3. sand and fine gravel

4. sand, fine gravel and medium gravel

Q.

Aeration does not kill the microorganisms.

1. True
2. False

Q.

Which of the following is/are products of wastewater treatment?

1. Biogas

2. Sludge

3. Paper

4. Aerator

Q.

Oils and fats should not be released in the drain.

1. True
2. False

Q.

If untreated sewage is discharged into rivers and seas, it will automatically be cleaned.

1. True

2. False

Q.

After sewage treatment, water can be used for

1. Drinking

2. Cooking food

3. Washing clothes

4. Cleaning house

Q. stage of sewage treatment involves the removal of bulkier solid wastes.

1. Primary
2. Secondary
3. Tertiary

Q. Which of the following are correctly matched ?
1. Arsenic poisoning - Black-foot disease
2. Secondary effluent treatment - Biological process
3. Pyrolysis - Waste disposal
4. Tubifex - Water pollution indicator
5. Biomagnification - Degradable pollutants

1. 1, 2, 3 and 5
2. 1, 3, 4 and 5
3. 2, 3, 4 and 5
4. 1, 2, 4 and 5
5. 1, 2, 3 and 4

Q.

why is chlorine used to disinfect water?

Q.

Formation of sludge takes place during __________ treatment in an effluent treatment plant.

1. secondary

2. tertiary

3. primary

4. quaternary

Q. What is the reason for Bangalore turning into a garbage city?

1. No proper solid waste management
2. High particulate matter
3. Polluted lakes
4. All of the above

Q.

In a filtration plant, water is filtered using layers of

1. sand and clay

2. sand and fine gravel

3. clay and fine gravel

4. sand, fine gravel and medium gravel

Q. Natural water is generally impure and requires treatment process before it is made potable.

1. true
2. false

Q. we say acids are watery to touch but curd has lactic acid but it is not why?

Q.

Accumulation of sewerage leads to water pollution and spread of various diseases.

1. False
2. True

Q. Which is not easily precipitated from aqueous solution ?

1. $C{l}^{-}$
2. $S{O}_4^{2-}$
3. $N{O}_3^{-}$
4. $C{O}_3^{2-}$

Q. Disinfectants are

1. Biological substances
2. Enzymes
3. Hormones
4. Chemical substances

Q.

Which of the following chemicals is used to disinfect water?

1. Washing soda

2. Silica

3. Chlorine

4. Coal

Q.

In the waste treatment plant (WWTP) air is pumped into the water to:

1. Support the growth of aerobic bacteria

2. Disinfect water

3. None of these

4. Support the growth of anaerobic bacteria

Q.

Which of the following is a part of inorganic impurities in the sewage?

1. Phosphates

2. Urea

3. Pesticides

4. Vegetable waste

Q. What is the process for waste water treatment called?

1. Water treatment
2. Sewage treatment
3. Filtration
4. Chlorination