CBSE Class 7 Science Wastewater Story MCQs Set A

Wastewater Story

Question. The increasing scarcity of fresh water is due to 
(a) Population growth 
(b) Pollution 
(c) Industrial development 
(d) All of the above

Answer:  D

Question. Liquid waste consisting of suspended impurities is called
(a) Contaminant
(b) Sewage 
(c) Aeration 
(d) Chlorination

Answer:  B

Question. WWTP stands for 
(a) Waste Water Therapy Plant
(b) Waste Water Treatment Plant
(c) Waste Water Travel Plant
(d) Waste Water Tremendous Plant

Answer:  B

Question. Cooking oil and fats should not be thrown down the drain because
(a) They flow through the drain freely
(b) It allows the particles to get filtered
(c) They harden and block the pipe 
(d) They break the pipe

Answer:  C

Question. Better housekeeping practices includes
(a) Cooking oil and fats should not be thrown down the drain
(b) Chemicals like paints, solvents, insecticides should not be thrown the drain
(c) Used tea leaves,solid food , cottonshould not be thrown in the drain
(d) All of the above

Answer:  D

Question. Water borne disease is
(a) Diabetes 
(b) Cancer
(c) Appendicitis
(d) Cholera

Answer:  D

Question. “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.” The above words are given by
(a) UNO
(b) UNICEF 
(c) UNESCO 
(d) WHO 

Answer:  B

Question. The technique of watering plants by making use of narrow tubings which deliver water directly at the base of the base of the plant is
(a) Lawn sprinkling
(b) Tube wells 
(c) River-lift irrigation
(d) Drip irrigation

Answer:  D

Question. Find the one which is a dried –up river
(a) Godavari
(b) Ganga 
(c) Mahanadi
(d) Arveri  e. k in colour 

Answer:  D

Question. Which of the following is a part of inorganic impurities of the sewage?
(a) Excreta
(b) Garbage
(c) Phosphate
(d) Vegetable waste

Answer:  C

Question. Period 2005-2015 is being celebrated as the international decade for action on
(a) water for life
(b) education for all
(c) global war
(d) terrorism

Answer:  A

Question. Which of the following is wastewater?
(a) Water trickling from a damaged tap
(b) Water coming out of a shower
(c) Water flowing in a river
(d) Water coming out of a laundry

Answer:  D

Question. Biodegradable wastes are generally
(a) Blended
(b) Synthetic
(c) Organic
(d) Inorganic

Answer:  C

Question. The full form of WWP is
(a) World Wide Transport Programme
(b) Waste Water Treatment Plant
(c) World Worker Talent Programme
(d) None of these

Answer:  B

Question. When waste water is passed through bar screens in WWTP, it removes
(a) plastic packets
(b) sand
(c) grit
(d) All of the above

Answer:  A

Question. In vermi-processing toilet the human excreta is treated by
(a) Redworm
(b) Tapeworm
(c) Earthworm
(d) Roundworm 

Answer:  C 

Question. A resource much needed for soil is
(a) septic tank
(b) vermic processing toilet
(c) chemical toilet
(d) composting pit

Answer:  B 

Question. The impurities present in sewage may consist of
(a) organic substances
(b) inorganic substances
(c) Nutrients
(d) All of the above

Answer:  D 

Question. Water that is not fit for use is called
(a) clean water
(b) wastewater
(c) both (a) and (b)
(d) none of these 

Answer:  B

Question. The full form of WWP is
(a) World Wide Transport Programme
(b) Waste Water Treatment Plant
(c) World Worker Talent Programme
(d) None of these 

Answer:  B 

Question. Which of the following is not an inorganic impurity present in sewage?
(a) Nitrate
(b) Phosphorus
(c) Urea
(d) Metal salt

Answer:  C 

Question. Adding air to treated water is called
(a) Fluorination
(b) Chlorination
(c) Aeration
(d) Oxygenation

Answer:  C

Question. An example of source reduction of waste is
(a) Burning
(b) Making paper aero planes
(c) Throwing things that are old
(d) Backward composting

Answer:  D

Question. The equipment that removes floatable particles from wastewater is
(a) sludge
(b) bar screen
(c) skimmer
(d) sedimentation tank

Answer:  C 

Question. Sewage refers to waste water that is released by
(a) homes
(b) industries
(c) offices
(d) All of the above 

Answer:  D 

Question. The process of removing pollutants in water before it enter a water body is called
(a) cleaning of water
(b) refining
(c) filtering of water
(d) none of these 

Answer:  A 

Question. The aerobic bacteria can be grown in clarified water by
(a) filtration
(b) sewage
(c) aeration
(d) sedimentation 

Answer:  C 

Question. Open drain system is a breeding place for which of the following:
(a) Files
(b) Mosquitoes
(c) Organisms which cause diseases
(d) All of these

Answer:  D 

Question. What is the full form of WWTP?
(a) Waste water travel plant
(b) Wastewater treatment plant
(c) Waste water therapy plant
(d) Waste water tropical plant

Answer:  B 

Question. Sludge in separate tanks is decomposed to get biogas by
(a) yeasts
(b) aerobic bacteria
(c) anaerobic bacteria
(d) none of these 

Answer:  C 

Question. A network of big and small pipes under the ground for wastewater management is known as
(a) sewage
(b) sewerage
(c) manhole
(d) channel 

Answer:  B 

Question. The network of drainage pipe to carry waste water is called
(a) Sewer system
(b) Water supply system
(c) Drainage
(d) Waste water supply 

Answer:  A 

Question. Select the one that is incorrect for vermin processing toilet.
(a) It is a new method and has been recently tested in India.
(b) It is a novel, low water use toilet that is safe for processing of human waste
(c) In it the human excreta is treated by round worms and cockroaches
(d) In it the human excreta is completely converted to vermi-cakes 

Answer:  C 

Question. Which of the following group is against the plantation of Eucalyptus trees?
(a) Paper manufacturers
(b) Wild life protection group
(c) Environmentalists
(d) Matches manufacturers

Answer:  C