Water polluted by various human activities causes a number of water borne disease. Which of the following is not a water borne disease?
- ACholera
- BTyphoid
- ✓Asthma
- DDysentry
Answer: C.
View full solution →Question types
Wastewater Story question types
111 questions across 9 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
111
Questions
9
Question groups
5
Question types
01
MCQ (1 Marks)
24 Q→02Assertion (A) & Reason (B) MCQ
5 Q→03True False[1 Marks ]
8 Q→04Fill In The Blanks With Correct Alternative.[1 Marks Each]
11 Q→051 Marks Question
29 Q→062 Marks Questions
23 Q→073 Marks Question
7 Q→08Match the Following.
1 Q→095 Marks Questions
3 Q→Sample Questions
Wastewater Story questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Open drain system is a breeding place for which of the following?
- AFlies
- BMosquitoes
- COrganisms which cause diseases
- ✓All of the above
Answer: D.
View full solution →Which of the following is/are products of wastewater treatment?
- ABiogas
- BSludge
- ✓Both (a) and (b)
- DAerator
Answer: C.
View full solution →The system of a network of pipes used for taking away wastewater from homes or public buildings to the treatment plant is known as
- Asewers
- ✓sewerage
- Ctransport system
- Dtreatment plant
Answer: B.
View full solution →Sewage is mainly a
- ✓liquid waste
- Bsolid waste
- Cgaseous waste
- Dmixture of solid and gas
Answer: A.
View full solution →Assertion (A) Cooking oil and fats should be thrown down the drain.
Reason (R) They can harden and block the pipes.
Reason (R) They can harden and block the pipes.
- ABoth A and R are true and R is the correct explanation of A
- BBoth A and R are true, but R is not the correct explanation of A
- CA is true, but R is false
- ✓A is false, but R is true
Answer: D.
View full solution →Assertion (A) Eucalyptus trees should be planted along the sewage ponds.
Reason (R) Eucalyptus trees absorb surplus wastewater rapidly.
Reason (R) Eucalyptus trees absorb surplus wastewater rapidly.
- ✓Both A and R are true and R is the correct explanation of A
- BBoth A and R are true, but R is not the correct explanation of A
- CA is true, but R is false
- DA is false, but R is true
Answer: A.
View full solution →Assertion (A) Nitrates, phosphates and metals are inorganic impurities in sewage.
Reason (R) Aeration is the first step to treat polluted water.
Reason (R) Aeration is the first step to treat polluted water.
- ABoth A and R are true and R is the correct explanation of A
- BBoth A and R are true, but R is not the correct explanation of A
- ✓A is true, but R is false
- DA is false, but R is true
Answer: C.
View full solution →Assertion (A) Ozone is used as a disinfectant.
Reason (R) It kills microorganism present in water.
Reason (R) It kills microorganism present in water.
- ✓Both A and R are true and R is the correct explanation of A
- BBoth A and R are true, but R is not the correct explanation of A
- CA is true, but R is false
- DA is false, but R is true
Answer: A.
View full solution →Assertion (A) Rainwater that runs down the street during heavy rain is sewage.
Reason (R) It carries harmful substances with it.
Reason (R) It carries harmful substances with it.
- ABoth A and R are true and R is the correct explanation of A
- ✓Both A and R are true, but R is not the correct explanation of A
- CA is true, but R is false
- DA is false, but R is true
Answer: B.
View full solution →Sewage is a solid waste which causes water pollution and soil pollution.
Sewage should not be treated before being disposed off into the water bodies.
Microorganisms are present in the domestic waste also.
Wastewater could be reused.
Used water is wastewater.
Fill in the blanks in the following statements using words given in the box.
[air, handpumps, cholera, water, large, ground]
A very __________ number of people defecate in the open. It may cause __________ pollution and soil pollution. Both the surface water and __________ water gets polluted, __________ water is the source for wells, tubewells and __________. Thus, it becomes the most common route for __________ borne disease like __________ dysentery, etc
[air, handpumps, cholera, water, large, ground]
A very __________ number of people defecate in the open. It may cause __________ pollution and soil pollution. Both the surface water and __________ water gets polluted, __________ water is the source for wells, tubewells and __________. Thus, it becomes the most common route for __________ borne disease like __________ dysentery, etc
Untreated human excreta is a __________ hazard.
Dried sludge is used as __________.
Wastewater is treated in __________.
Drains get blocked by __________ and__________.
Trisha has seen huge garbage dumps outside the school campus which are not being regularly disposed off by municipality of the area. She discussed the problem with her biology teacher and decided to organise a rally to spread awareness among local people. Next day she delivered this information in the assembly and convinced the school mates to join her. She also explained them about the importance of sanitation at public places which she had recently studied in biology.
(i) In your views, who is responsible to maintain sanitation at public places?
(ii) What would happen, if all the wastes produced at public places are not disposed off regularly?
(i) In your views, who is responsible to maintain sanitation at public places?
(ii) What would happen, if all the wastes produced at public places are not disposed off regularly?
One day Sachin had gone to his uncle who lives in a village. He saw there a large number of people defecate in an open area because proper toilet facilities are not there. He wondered about the groundwater contamination, as he studied in his class that this act may cause water-borne diseases. He convinced village people to make toilets in order to avoid such an out break of water-borne diseases.
(i) Name two water-borne diseases.
(ii) What values are shown by Sachin?
(i) Name two water-borne diseases.
(ii) What values are shown by Sachin?
Visit a village with your parents. Find out the sewage disposal system available there. Compare it with sewage disposal system available in the cities.
Animal waste, oil and urea are some of the organic impurities present in sewage. Name two more organic impurities present in sewage.
Name two inorganic impurities present in sewage.
A man travelling in a train threw an empty packet of food on the platform. Do you think this is a proper waste disposal method? Elaborate.
Give reasons for each of the following.
(i) We should not throw used tea leaves into sink.
(ii) We should not throw cooking oil and fats down the drain.
(i) We should not throw used tea leaves into sink.
(ii) We should not throw cooking oil and fats down the drain.
The terms sewage, sewers and sewerage are interlinked with each other. Can you explain, how?
Think and suggest some ways to minimise waste and pollutants at their source, taking your home as an example.
Discuss various steps of cleaning waste water in a wastewater treatment plant.
Recall and enlist some better housekeeping practices.
Observe the given figure and answer the following
(a) What does this figure show?
(b) State the functions of each part of the figure.
(a) What does this figure show?
(b) State the functions of each part of the figure.
Outline your role as an active citizen in relation to sanitation.
What is sewage? Explain, why it is harmful to discharge untreated sewage into rivers or sea?
List the ways in which wastewater present in sewage is generated and the kind of contaminants present in each.
| Column I | Column II |
| A. Oils and grease | 1. Low cost onsite sewage |
| B. Chemical toilets | 2. Skimmer |
| C. Vermicomposting toilets | 3. Remove large object |
| D. Bar screens | 4. Earthworms |
Given below is a jumbled sequence of the processes involved in a wastewater treatment plant. Arrange them in their correct sequence.
(i)Sludge is scraped out and skimmer removes floating grease.
(ii)Water is made to settle in a large tank with a slope in the middle.
(iii)Large objects like plastic bags are removed by passing wastewater through bar screens.
(iv)Sand, grit and pebbles are made to settle by decreasing the speed of incoming wastewater.
(v)Wastewater enters a grit and sand removal tank.
(i)Sludge is scraped out and skimmer removes floating grease.
(ii)Water is made to settle in a large tank with a slope in the middle.
(iii)Large objects like plastic bags are removed by passing wastewater through bar screens.
(iv)Sand, grit and pebbles are made to settle by decreasing the speed of incoming wastewater.
(v)Wastewater enters a grit and sand removal tank.
Study the following statements about ozone.
I. It is essential for breathing of living organisms.
II. It is used to disinfect water.
III. It absorbs ultraviolet rays.
IV. Its proportion in air is about 3%.
Which of these statements are correct?
(a) I, II and III
(b) II and III
(c) I and IV
(d) All of the above
I. It is essential for breathing of living organisms.
II. It is used to disinfect water.
III. It absorbs ultraviolet rays.
IV. Its proportion in air is about 3%.
Which of these statements are correct?
(a) I, II and III
(b) II and III
(c) I and IV
(d) All of the above
In a city, there are separate pipes for disposing sewage and storing water. Why is this necessary?
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