Sewage Treatment Plant

Q.

Which method is used to convert organic waste into manure?

1. Composting

2. Dumping

3. Sewage Treatment

4. Sedimentation

Q.

Which of the following is added to muddy water to settle the colloidal particles?

1. Alum

2. Potash

3. Lime

4. Chlorine

Q.

State whether the statement is true or false.
Oils and fats should not be released in the drain.

1. True
2. False

Q.

Scrubbers are devices used to remove _________ pollutants.

1. solid

2. gaseous

3. heavy metal

4. liquid

Q.

Tertiary stage in sewage waste treatment involves the removal of ________

1. Pathogens

2. Metals

3. Solid Waste

4. Harmful Chemicals

Q.

What Is BOD? Give its definition and full form.

Q.

What is the term given to the biological decomposition of organic matter under controlled conditions?

1. Composting

2. Vermification

3. Manuring

4. Vermicomposting

Q.

How does eutrophication affect human health?

Q.

After sewage treatment, water can be used for ___

Drinking

Cooking food

Washing clothes

Cleaning house

Q. Match the columns with the correct pair.

1. Used for muddy water
2. Requires heat
3. Bleaching powder
4. Uses earthen pot

Q.

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

1. Pesticides

2. Urea

3. Vegetable waste

4. Phosphates

Q. The degrading and conversion of organic waste materials into manure is called

1. recycling
2. composting
3. garbage
4. land filling

Q.

What are the devices used for filtering polluted air?

1. Electrostatic precipitators

2. Electrically charged plates

3. Scrubbers

4. Electrodynamic precipitators

Q.

Identify the are the steps for wastewater treatment.

1. Boiling

2. Sludge treatment

3. Sedimentation

4. Deforestation

Q. Cow dung is added in the composting pit as it acts as a source of microorganisms.

1. True
2. False

Q.

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

1. True

2. False

Q.

The wastewater from sewage treatment plants after treatment is recycled and the solid waste is converted into fertilisers.

1. True

2. False

Q.

Which of the following is/are products of sewage water treatment?

1. Phosphorous

2. Sludge

3. Paper

4. Aerator

Q. Vermicomposting is more expensive than buying chemical fertilizers.
Is the above statement true or false?

1. True
2. False

Q.

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

1. True
2. False