Sewage

Q.

Question 12

State whether the following statements are True or False. In case a statement is false, write the correct statement.
1. Sewage is a solid waste which causes water pollution and soil pollution.
2. Used water is wastewater.
3. Wastewater could be reused.
4. Where underground sewerage systems and refuse disposal systems are not available, the high-cost onsite sanitation system can be adopted.

Q.

Question 14

Name two inorganic impurities present in sewage.

Q.

Which of the following bacteria is found in Ganga water:

1. Coliform bacteria

2. Streptococcus bacteria

3. Staphylococcus bacteria

4. Diplococcus bacteria

Q.

Question 2

Sewage is mainly a
(a) liquid waste
(b) solid waste
(c) gaseous waste
(d) a mixture of solid and gas

Q.

How are open drains harmful to human health?

Q.

Question 22

A mixture (x) in water contains suspended solids, organic impurities, inorganic impurities (a), nutrients (b), disease causing bacteria and other microbes. Give names for (x), (a) and (b)?

Q. Sewage is a solid waste.

1. True
2. False

Q.

If untreated sewage is discharged into water bodies it will clean the water resources.

1. True

2. False

Q.

What happens when drinking water supplies get mixed with sewage?

Q.

Sewage contains which of the following wastes and impurities?

1. Dissolved wastes

2. Non-biodegradable wastes

3. Suspended impurities

4. Biodegradable impurities

Q. Sewage is mainly a ___ waste.

1. liquid
2. solid
3. gaseous
4. both liquid and solid

Q. ____ is a transportation system that carries sewage from the point of production to the point of disposal.

1. Sewerage
2. Sludge
3. Manholes
4. Wastewater Plant

Q. What is sewage? Explain why it is harmful to discharge untreated sewage into rivers or seas.

Q.

Waste water released from toilets is termed as foul waste and is full of germs and ___

Q. Pollution in rivers like the Ganga is caused by which of the following factors?

1. Louder noise.
2. Dumping of industrial waste into rivers.
3. Releasing treated sewage into rivers.
4. Transportation.

Q.

Which of the following will not contribute to sewage water?

1. Sea water

2. Shower water

3. Toilet water

4. Laundry water

Q. What is sewage? How does sewage cause degeneration of water quality? [3 MARKS]

Q.

__ is a process to convert wastewater; which is water no longer needed or suitable for its most recent use - into an effluent that can be either returned to the water cycle with minimal environmental issues or reused.

Q. Sewage contains which of the following wastes/impurities?

1. Dissolved waste
2. Microbes
3. Non- biodegradable wastes
4. Suspended impurities

Q. Accumulation of sewage leads to _________.

1. water pollution
2. enrichment of nutrients
3. various diseases
4. to maintain good health

Q.

Which of the following impurity present in sewage is removed by chlorination?

1. Pesticides

2. Animal waste

3. Phosphates

4. Human Faeces

Q.

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

1. False
2. True

Q.

What is a sewerage? What are various inorganic impurities present in wastewater? [2 MARKS]

Q.

Bore wells have to be dug very deep in towns and cities to get water. Give reason.

Q.

Anu showed Appu a sample of water from the Ganga River. It was not transparent and contained some suspended grime. Appu said that he could make it drinkable. He filtered the water using a filter paper to remove the grime. The filtered water was clean; Appu also boiled this water to kill harmful microbes and gave it to Anu to drink. Anu said that the water was still polluted and undrinkable. Can you say why?

1. The water contained dissolved chemicals

2. The water contained harmful microbes

3. The water contained undissolved impurities

4. None of the above

Q. How do the habit of overwatering leads to contamination of the ground water?

Q. Which of the following sewage impurities can be categorised as suspended impurities?

Q.

Question 2
What is sewage? Explain why it is harmful to discharge untreated sewage into rivers or seas.

Q. impurities are biodegradable.

1. Inorganic
2. Organic
3. Suspended

Q. Which of the following will contribute to sewage?

1. Laundry water
2. Toilet water
3. Shower water
4. Seawater