Class 7 Science Chapter 13 MCQ (Multiple Choice Questions) of Wastewater Story in English Medium updated for CBSE Session 2024-25. All the questions are important and useful of terminal exams and class tests. MCQs are design in such a way it covers the entire chapter 13 of class 7 science. There are about 60 questions in all divided into 10 MCQ online tests.
Class 7 Science Chapter 13 MCQ for 2024-25
Class: 7 | Science |
Chapter: 18 | Wastewater Story |
Contents: | MCQ Online Quiz with answers |
MCQ Tests with Answers for Class 7 Science Chapter 18
Q1
Consider the following statements and choose the incorrect one:
[A]. Clean water is a basic necessity of our life.
[B]. The wastewater may also contain pieces of human excreta.
[C]. Use water or waste water could not be reused after cleaning it.
[D]. The cleaning of water is a process of removing pollutants harmful substances from it.
Q2
Sewage is mainly a:
[A]. Liquid waste
[B]. Solid waste
[C]. Gaseous waste
[D]. Mixture of solid and gas
Q3
Which of the following is or are products of wastewater treatment?
[A]. Biogas
[B]. Sludge
[C]. Both biogas and sludge
[D]. Aerator
Q4
Open drain system is a breeding place for which of the following?
[A]. Flies
[B]. Mosquitoes
[C]. Organisms which cause disease
[D]. All the above
Q5
Read the following sentences carefully, and choose the incorrect one:
[A]. Use water is waste water which can be recycled.
[B]. Wastewater is treated in a sewage treatment plant.
[C]. By products of wastewater treatment are sludge and biogas.
[D]. Sewage is a liquid waste which causes water pollution.
Q6
Water polluted by various human activities cause a number of water-borne diseases. Which of the following is not a water-borne disease?
[A]. Cholera
[B]. Typhoid
[C]. Asthma
[D]. Dysentry
Q7
Arpit appeared in class test but he confused to know the correct statement. Would you help him to know that?
[A]. Open drain system is a breeding ground for flies, mosquitoes and organisms which spread diseases.
[B]. Waste water is produced in houses, industries, agricultural fields and other human activities which is known as sewage.
[C]. When underground sewage system and refuse disposal system not possible, the low cost on site sanitation system may be adopted.
[D]. All the above.
Q8
The system of a network of pipes used for taking away wastewater from homes or public buildings to the treatment plant is known as
[A]. Sewers
[B]. Sewerage
[C]. Transport system
[D]. Treatment plant
Q9
Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?
[A]. Bacteria which can grow and multiply in absence of free oxygen are called anaerobic bacteria.
[B]. Water which is cleared from the floatable substances like oil and grease by a skimmers is called clarified water.
[C]. Waste water solids like faeces, which settle down at the bottom of a large tank and are removed with a scraper are called sludge.
[D]. None of the above.
Q10
The full form of WWTP is:
[A]. World Wide Transport Programme
[B]. Waste Water Treatment Plant
[C]. World Workers’ Talent Programme
[D]. None of these.
Q11
Which is used in vermi processing toilets?
[A]. Cockroaches
[B]. Earthworms
[C]. Snail
[D]. Silkworms
Q12
In a filtration plant, water is filtered using layers of:
[A]. Sand and clay
[B]. Clay and fine gravel
[C]. Sand and fine gravel
[D]. Sand, fine gravel and medium gravel
Q13
Which of the following is not a source of wastewater?
[A]. Sewers
[B]. Homes
[C]. Industries
[D]. Hospitals
Q14
“No one need to wait for anyone else to adopt a humane and enlightened course of action.” – said by:
[A]. Mahatma Gandhi
[B]. Pandit Jawaharlal Nehru
[C]. Sardar Vallabhbhai Patel
[D]. Subhas Chandra Bose
Q15
Which of the following statements about ozone are correct?
[A]. It is essential for breathing of living organisms and it is used to disinfect water.
[B]. It is used to disinfect water and it absorbs ultraviolet rays.
[C]. It is essential for breathing of living organisms and it absorbs ultraviolet rays.
[D]. It is used to disinfect water and its proportion in air is about 3%.
Q16
Which of the following is not an inorganic impurity present in sewage?
[A]. Nitrate
[B]. Phosphate
[C]. Urea
[D]. Metal salt
Q17
“By providing clean water and sanitation to the poorest people on the planet, we can reduce poverty and suffering and ensure education for all children.”— said by:
[A]. International Labour Organisation (ILO)
[B]. International Monetary Fund (IMF)
[C]. Food and Agricultural Organisation (FAO)
[D]. United Nations International Children’s Emergency Fund (UNICEF)
Q18
Which of the following organisms produce biogas from sludge in the digester tank of a wastewater treatment plant?
[A]. Anaerobic bacteria
[B]. Fungi
[C]. Aerobic bacteria
[D]. Protozoa
Q19
Durgesh is doing his homework which is given by his teacher. Would you help him to choose the correct sentences?
[A]. Waste cooking oils and fats should not be thrown in the kitchen sink to go down the drain.
[B]. The climate like paints, solvents, insecticides, medicines and motor oil etc., should not be thrown down the drain.
[C]. The wastes such as solid food remains, used tea leaves, sanitary towels, polythene bags used cotton, hair etc., should not be thrown the drains.
[D]. All the above
Q20
Which of the following is not a water-borne disease?
[A]. Cholera
[B]. Tuberculosis
[C]. Typhoid
[D]. Dysentery
Q21
One of the following type of trees are said to help in purifying wastewater quite rapidly when planted all along the sewage ponds. These are:
[A]. Eucalyptus tree
[B]. Ficus tree
[C]. Neem tree
[D]. Peepal trees
Q22
In a quiz competition, you are asked a question where you have to choose the statement which is/ are incorrect?
[A]. Poor sanitation in crowded public places can result in the spread of diseases.
[B]. Open dirty water drains are breeding place for flies, mosquitoes and other disease-causing organisms.
[C]. If all the wastes produced at public places are not disposed at of regularly and properly, even epidemics could break out.
[D]. Only the responsibility of the municipality of the area to maintain sanitization or hygienic condition.
Q23
Vacuum toilets are usually used in:
[A]. Superfast trains
[B]. Cinema halls
[C]. Aeroplanes
[D]. Large ships
Q24
Consider the following statements and choose the correct one:
[A]. We should never urinate on the roadside.
[B]. We should not spit in public places.
[C]. After eating a banana, we should not throw banana peels on the road side.
[D]. All the above
Q25
Which of the following are used for the safe disposal of human excreta in those areas where sewerage system does not exist and water supply is limited or not available at all?
[A]. Chemical toilets
[B]. Vacuum toilets
[C]. Septic tank toilets
[D]. Composting toilets
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Last Edited: June 13, 2023