7th Class Science Wastewater Story Question Bank

done Wastewater Story Total Questions - 99

• question_answer1)
  Out of the following, select those that would help to reduce water pollution. (i) use of sewers for removal of urban waste (ii) use of unleaded petrol in cars (iii) spraying of pesticides on plants (iv) We should not excreate in open.
  A)
   (i) and (ii)                   done clear
  B)
   (iii) and (iv) done clear
  C)
   (i) and (iv)       done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer2)
  Select the one that is incorrect for vermin processing toilet.
  A)
  It is a new method and has been recently tested in India. done clear
  B)
  It is a novel, low water use toilet that is safe for processing of human waste done clear
  C)
  In it the human excreta is treated by round worms and cockroaches done clear
  D)
  In it the human excreta is completely converted to vermi-cakes done clear
  View Solution play_arrow

• question_answer3)
  The international decade for action on "water for life" by United Nations General Assembly was declared on
  A)
  Jan, 26           done clear
  B)
  March, 22 done clear
  C)
  April, 14           done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer4)
   Sewage refers to waste water that is released by
  A)
  homes                          done clear
  B)
  industries done clear
  C)
  offices                          done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer5)
  Select the disease that is not caused by improper disposal of sewage.
  A)
  Cholera            done clear
  B)
  Typhoid done clear
  C)
  Heart attack      done clear
  D)
  Jaundice done clear
  View Solution play_arrow

• question_answer6)
  In a waste water treatment plant, after passing the waste water through a grit and sand removal tank, the water is allowed to settle in a large tank. The solids that settle at the bottom of large tank and called
  A)
  sewage             done clear
  B)
  sullage done clear
  C)
  sludge              done clear
  D)
  activated sludge done clear
  View Solution play_arrow

• question_answer7)
  Which plant is suggested for purification of sewage pond water?
  A)
  waste water plant         done clear
  B)
  Eucalyptus plant done clear
  C)
  urena plant                  done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer8)
  Which of the following group is against the plantation of Eucalyptus trees?
  A)
  Paper manufacturers done clear
  B)
  Wild life protection group done clear
  C)
  Environmentalists done clear
  D)
  Matches manufacturers done clear
  View Solution play_arrow

• question_answer9)
  Sewage treatment
  A)
  is a process of waste water treatment. done clear
  B)
  refers to waste water that is released by homes, industries, hospitals etc. done clear
  C)
  refers to the rain water that run down the streets during heavy rains. done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer10)
  The impurities present in sewage may consist of
  A)
  organic substances      done clear
  B)
  inorganic substances done clear
  C)
  Nutrients done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer11)
  Select those which are organic substances present in waste water.
  A)
  pesticides done clear
  B)
  herbicides done clear
  C)
  fruit and vegetable waste done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer12)
  Treatment plants
  A)
  reduce pollutants in waste water to a level where nature can take care of it. done clear
  B)
  makes the waste water free of all pollutants done clear
  C)
  Both the above are correct done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer13)
  The sludge waste originates from
  A)
  kitchen done clear
  B)
  toilets done clear
  C)
  industrial organizations done clear
  D)
  commercial organizations done clear
  View Solution play_arrow

• question_answer14)
  In the treatment of waste water, following steps are involved. (i) aeration                   (ii) nitration (iii) chlorination The correct order of these steps is
  A)
   (i),(iii),(ii)                    done clear
  B)
   (iii), (ii), (i) done clear
  C)
   (i), (ii), (iii)          done clear
  D)
   (ii), (iii), (i) done clear
  View Solution play_arrow

• question_answer15)
  When waste water is passed through bar screens in WWTP, it removes
  A)
  plastic packets   done clear
  B)
  sand done clear
  C)
  grit                               done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer16)
  Which of the following are removed by use of A skimmer in WWTP?
  A)
  Oils                              done clear
  B)
  Greases done clear
  C)
  Both of these                done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer17)
  The percentage of water in activated sludge is about
  A)
  90%                             done clear
  B)
  92% done clear
  C)
  95%                             done clear
  D)
  97% done clear
  View Solution play_arrow

• question_answer18)
  What are the products of waste water treatment system?
  A)
  sludge                          done clear
  B)
  biogas done clear
  C)
  Both of these                done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer19)
  Liquid waste consisting of suspended impurities is called _____.
  A)
  sewage            done clear
  B)
  contaminant done clear
  C)
  slurry                            done clear
  D)
  sludge done clear
  View Solution play_arrow

• question_answer20)
  What is the full form of WWTP?
  A)
  Waste water travel plant done clear
  B)
  Waste water treatment plant done clear
  C)
  Waste water therapy plant done clear
  D)
  Waste water tropical plant done clear
  View Solution play_arrow

• question_answer21)
  Water scarcity problem is increasing day by day because of
  A)
  population growth done clear
  B)
  industrial development' done clear
  C)
  pollution done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer22)
  We should not throw cooking oil and paint down the drain because
  A)
  they break the pipe done clear
  B)
  they harden and clog the pipe done clear
  C)
  they flow through the drain freely done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer23)
  Which of the following is a good practice be followed?
  A)
  Cooking oil and paint should not be thrown down a drain. done clear
  B)
  Used tea leaves, solid food and cotton should not be thrown in the drain. done clear
  C)
  Chemicals like insecticides should not throw in the drain. done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer24)
  The technique of watering plants by making use of narrow tubing?s which deliver water directly at the base of the plant is
  A)
  river lift irrigation         done clear
  B)
  tube wells done clear
  C)
  lawn sprinkling             done clear
  D)
  drip irrigation done clear
  View Solution play_arrow

• question_answer25)
  Which of the following is a water borne disease?
  A)
  cholera            done clear
  B)
  Typhoid done clear
  C)
  Jaundice                      done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer26)
  A resource much needed for soil is
  A)
  septic tank done clear
  B)
  vermic processing toilet done clear
  C)
  chemical toilet done clear
  D)
  composting pit done clear
  View Solution play_arrow

• question_answer27)
  Sewage is generated from mainly
  A)
  hospitals                      done clear
  B)
  houses done clear
  C)
  factories                       done clear
  D)
  offices done clear
  View Solution play_arrow

• question_answer28)
  Aeration of water during waste water treatment removes
  A)
  Bacteria                       done clear
  B)
  Germs done clear
  C)
  Human Waste    done clear
  D)
  Sand done clear
  View Solution play_arrow

• question_answer29)
  Which process during waste water treatment helps in eliminating germs?
  A)
  Aeration                       done clear
  B)
  Sedimentation done clear
  C)
  Chlorination       done clear
  D)
  Flocculation done clear
  View Solution play_arrow

• question_answer30)
  Which of the following diseases caused by drinking contaminated waste?
  A)
  Pneumonia                  done clear
  B)
  Small Pox done clear
  C)
  Malaria           done clear
  D)
  Cholera done clear
  View Solution play_arrow

• question_answer31)
  Drain get blocked by
  A)
  germs and bacteria      done clear
  B)
  oil and fat done clear
  C)
  paints and chemicals done clear
  D)
  Both (b) and (c) done clear
  View Solution play_arrow

• question_answer32)
  Dried _____ is used as manure
  A)
  sludge            done clear
  B)
  slury done clear
  C)
  sewage             done clear
  D)
  sand done clear
  View Solution play_arrow

• question_answer33)
  Which of the following can be used to disinfect water?
  A)
  Bleaching Powder        done clear
  B)
  Chlorine tablets done clear
  C)
  Both (a) and (b)           done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer34)
  Water pollution is caused by
  A)
  washing clothes           done clear
  B)
  human excreta done clear
  C)
  chemicals                     done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer35)
  Water borne disease is
  A)
  Anthrax           done clear
  B)
  Typhoid done clear
  C)
  Malaria                        done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer36)
  The impurities present in sewage are called__.
  A)
  Contaminants      done clear
  B)
  Grit done clear
  C)
  Organic                       done clear
  D)
  Inorganic done clear
  View Solution play_arrow

• question_answer37)
  The manholes in a sewage system are located at every ___m.
  A)
  40-50                           done clear
  B)
  50-60 done clear
  C)
  60-70                           done clear
  D)
  10-20 done clear
  View Solution play_arrow

• question_answer38)
  The network of big and small pipes that forms a sewage is called ____
  A)
  Septic lines                  done clear
  B)
  Clarifier done clear
  C)
  Drain              done clear
  D)
  Sewers done clear
  View Solution play_arrow

• question_answer39)
  Which of the following trees should be planted along sewage ponds?
  A)
  Neem              done clear
  B)
  Eucalyptes done clear
  C)
  Peepal             done clear
  D)
  Banyan done clear
  View Solution play_arrow

• question_answer40)
  In vermi-processing toilet the human excreta is treated by
  A)
  Redworm                     done clear
  B)
  Tapeworm done clear
  C)
  Earthworm       done clear
  D)
  Roundworm done clear
  View Solution play_arrow

• question_answer41)
  DIRECTIONS: Match Column-I with column II and select the correct answer using the codes given below the columns.

  Column-I	Column-II
  (A) Pesticides, herbicides, fruits and vegetable waste etc.	(p) Inorganic waste in waste water
  (B) Nitrates, Phosphates, metals etc.	(q) Organic waste in waste water
  (C) Nitrogen, Phosphorus	(r) Nutrients in waste water
  (D) Cholera causing bacteria	(s) Bacteria in waste water

  A)
  A®(p); B® (q); C® (r); D® (s) done clear
  B)
  A®(q); B ® (p); C ® (r); D ® (s) done clear
  C)
  A®(q); B®(p); C® (s); D®(r) done clear
  D)
  A®(p); B®(q); C®(s); D®(r) done clear
  View Solution play_arrow

• question_answer42)
  DIRECTIONS: Match Column-I with column II and select the correct answer using the codes given below the columns.

  Column-I	Column-II
  (A) Sewage	(p) Suspended impurities present in sewage.
  (B) Contaminants	(q) Phosphorus and Nitrogen
  (C) Nutrients present as suspended impurities in waste water,	(r) Liquid waste which causes water and soil pollution
  (D) Inorganic impurities present in waste water	(s) Phosphates and nitrates

  A)
  A\[\to \] (p); B\[\to \] (q); C\[\to \] (r); D\[\to \] (s) done clear
  B)
  A\[\to \] (q); B\[\to \] (r); C\[\to \] (s); D\[\to \] (p) done clear
  C)
  A\[\to \] (r); B\[\to \] (p); C\[\to \] (q); D\[\to \] (s) done clear
  D)
  A\[\to \] (s); B\[\to \] (q); C\[\to \] (p); D\[\to \] (s) done clear
  View Solution play_arrow

• question_answer43)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 1 Sewage is a complex mixture containing suspended solids, organic and inorganic impurities, nutrients, saprotrophic and disease causing bacteria and other microbes. Consider the following waste present in sewage and answer the questions. (i) Animal waste (ii) Fruit and vegetable waste (iii) Nitrates (iv) Phosphates (v) Phosphorus (vi) Nitrogen The organic impurities are:-
  A)
   (i) and (ii) only            done clear
  B)
   (i), (ii), (iii) only done clear
  C)
   (i) only                                    done clear
  D)
   (ii) only done clear
  View Solution play_arrow

• question_answer44)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 1 Sewage is a complex mixture containing suspended solids, organic and inorganic impurities, nutrients, saprotrophic and disease causing bacteria and other microbes. Consider the following waste present in sewage and answer the questions. (i) Animal waste (ii) Fruit and vegetable waste (iii) Nitrates (iv) Phosphates (v) Phosphorus (vi) Nitrogen The inorganic impurities are: -
  A)
   (i) and (ii) only done clear
  B)
   (i), (ii), (iii) and (iv) only done clear
  C)
   (iii) to (vi) done clear
  D)
   (v) and (vi) only done clear
  View Solution play_arrow

• question_answer45)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 1 Sewage is a complex mixture containing suspended solids, organic and inorganic impurities, nutrients, saprotrophic and disease causing bacteria and other microbes. Consider the following waste present in sewage and answer the questions. (i) Animal waste (ii) Fruit and vegetable waste (iii) Nitrates (iv) Phosphates (v) Phosphorus (vi) Nitrogen The nutrients present in impurity in sewage are
  A)
   (iii), (iv) and (v)          done clear
  B)
   (i), (ii) and (vi) done clear
  C)
   (ii), (iv) and (vi)          done clear
  D)
   (v) and (vi) done clear
  View Solution play_arrow

• question_answer46)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 Treatment of waste water involves physical, chemical and biological processes, which remove physical, chemical and biological matter that contaminates the waste water. In WWTP, in one of the steps, the water is allowed to settle in large tank which is sloped towards the middle. In it impurities settle at the bottom. These settled impurities are called
  A)
  Sewer                          done clear
  B)
  skimmer done clear
  C)
  sludge              done clear
  D)
  activated sludge done clear
  View Solution play_arrow

• question_answer47)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 Treatment of waste water involves physical, chemical and biological processes, which remove physical, chemical and biological matter that contaminates the waste water. The treated water coming out of WWTP
  A)
  has very low level of organic material and suspended impurities. done clear
  B)
  is free of organic material and suspended impurities. done clear
  C)
  Both the above are correct done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer48)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 Treatment of waste water involves physical, chemical and biological processes, which remove physical, chemical and biological matter that contaminates the waste water. Biogas is one of the products at WWTP. Biogas can be used
  A)
  as a fuel                       done clear
  B)
  to produce electricity done clear
  C)
  Both the above done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer49)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 3 Poor sanitation and contaminated drinking water is a cause of large number of diseases. To improve sanitation, low cost on-site sewage disposal systems are being encouraged. Various water borne diseases are
  A)
  hepatitis          done clear
  B)
  meningitis done clear
  C)
  cholera             done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer50)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 3 Poor sanitation and contaminated drinking water is a cause of large number of diseases. To improve sanitation, low cost on-site sewage disposal systems are being encouraged. Untreated human excreta is a health hazard because it may cause
  A)
  water pollution             done clear
  B)
  soil pollution done clear
  C)
  Both the above            done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer51)
  DIRECTIONS: The questions in this segment consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Cleaning of water is a process of removing pollutants before it enters a water body Reason (R): The process of cleaning of water and removel of pollutants from it is called "sewage treatment"
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer52)
  DIRECTIONS: The questions in this segment consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Sewage is a liquid waste. Reason (R): The dissolved and suspended impurities present in sewage are known as contaminants.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer53)
  DIRECTIONS: The questions in this segment consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): The underground network of big and small pipes that carries sewage from point of being produced to the point of disposal is known as sewerage; Reason (R): In sewerage manholes are located at every 30 m to 40 m.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer54)
  DIRECTIONS: The questions in this segment consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion A: We should not consume contaminated water. Reason R: Dirty water contain toxic chemicals and germs that can cause diseases
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer55)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Ozone is used to disinfect water (ii) Chlorine is used to disinfect water
  A)
  Statement (i) is correct while statement (ii) is incorrect. done clear
  B)
  Statement (ii) is correct while statement (i) is incorrect. done clear
  C)
  Both statements are correct. done clear
  D)
  Both statements are incorrect. done clear
  View Solution play_arrow

• question_answer56)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Sewage is a complex mixture (ii) Sewage is a solid waste
  A)
  Statement (i) is correct while statement (ii) is incorrect. done clear
  B)
  Statement (ii) is correct while statement (i) is incorrect. done clear
  C)
  Both statements are correct. done clear
  D)
  Both statements are incorrect. done clear
  View Solution play_arrow

• question_answer57)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Wastes released by houses is called sewage (ii) Waste that originates from kitchen is called sludge
  A)
  Statement (i) is correct while statement (ii) is incorrect. done clear
  B)
  Statement (ii) is correct while statement (i) is incorrect. done clear
  C)
  Both statements are correct. done clear
  D)
  Both statements are incorrect. done clear
  View Solution play_arrow

• question_answer58)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Trade wastes originates from houses (ii) Sludge wastes originates from kitchen
  A)
  Statement (i) is correct while statement (ii) is incorrect. done clear
  B)
  Statement (ii) is correct while statement (i) is incorrect. done clear
  C)
  Both statements are correct. done clear
  D)
  Both statements are incorrect. done clear
  View Solution play_arrow

• question_answer59)
  DIRECTIONS: Carefully observe pictures given below and answer the following questions. The diagram below shows some ways in which groundwater can be affected by humans. Which statement is best supported by the diagram?
  A)
  Chemicals applied by farmers lower the level of pollution in drinking water. done clear
  B)
  Drinking water can become polluted from unsuspected sources. done clear
  C)
  Human activities do not affect groundwater. done clear
  D)
  Toxic waste is safe if buried below the level of the basements of nearby homes. done clear
  View Solution play_arrow

• question_answer60)
  Sewage is
  A)
  waste water that is released by homes, industries, hospitals, offices etc. done clear
  B)
  rain water that has run down the street during a storm or heavy rain. done clear
  C)
  liquid waste which causes water and soil pollution. done clear
  D)
  All the above are correct. done clear
  View Solution play_arrow

• question_answer61)
  Trade waste, refers to
  A)
  waste that originates from kitchens done clear
  B)
  waste that originates from toilets. done clear
  C)
  waste that originates from industrial and commercial organizations. done clear
  D)
  All the above. done clear
  View Solution play_arrow

• question_answer62)
  Vermi-processing toilet
  A)
  is a design of toilet in which human excreta is treated by round worm. done clear
  B)
  is a design of toilet in which human excreta is treated by earthworm. done clear
  C)
  Both the above are correct done clear
  D)
  None of these is correct. done clear
  View Solution play_arrow

• question_answer63)
  The depletion of water table is due to
  A)
  increased use of water for industrial activities done clear
  B)
  increase in use of water for agricultural activities. done clear
  C)
  scarcity rainfall done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer64)
  How does increase in populations a cause for depletion of water table?
  A)
  Requirement of more houses done clear
  B)
  Requirement of more food done clear
  C)
  Requirement of more roads etc. done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer65)
  After passing that through bar screens the waste water goes to a grit and sand removed tank. Here the speed of incoming waste water is decreased
  A)
  to keep the system under control done clear
  B)
  to allow sand, grit and pebbles to settle down. done clear
  C)
  to allow foul smell to disappear done clear
  D)
  All the above are correct done clear
  View Solution play_arrow

• question_answer66)
  The recommended quantity of water for use person per day according to United Nation recommendation is A\[\times \]10 Liters where A is
  A)
  1                                  done clear
  B)
  3 done clear
  C)
  5                      done clear
  D)
  7 done clear
  View Solution play_arrow

• question_answer67)
  Effluent is generated mainly from
  A)
  Industries          done clear
  B)
  Offices done clear
  C)
  Houses            done clear
  D)
  Hospitals done clear
  View Solution play_arrow

• question_answer68)
  Which process can remove dirt and sand from waste water?
  A)
  Chlorination                done clear
  B)
  Sedimentation done clear
  C)
  Flocculation                 done clear
  D)
  Aeration done clear
  View Solution play_arrow

• question_answer69)
  Jaundice affects which organ?
  A)
  Stomach                      done clear
  B)
  Liver done clear
  C)
  Lungs                           done clear
  D)
  Heart done clear
  View Solution play_arrow

• question_answer70)
  Which process can be used to make sea water fit for drinking?
  A)
  Filtration                      done clear
  B)
  Boiling done clear
  C)
  Chlorination                done clear
  D)
  Reverse osmosis done clear
  View Solution play_arrow

• question_answer71)
  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                            done clear
  B)
  UNESCO done clear
  C)
  WHO                           done clear
  D)
  UNICEF done clear
  View Solution play_arrow

• question_answer72)
  Which of the following are biodegradable wastes?
  A)
  Excreta            done clear
  B)
  Sewage done clear
  C)
  Plastic              done clear
  D)
  Both (a) & (b) done clear
  View Solution play_arrow

• question_answer73)
  Which of the following are non-biodegradable wastes?
  A)
  Paper              done clear
  B)
  Vegetables done clear
  C)
  Wood               done clear
  D)
  Polythene done clear
  View Solution play_arrow

• question_answer74)
  These choke the drains
  A)
  Liquid wastes              done clear
  B)
  Plastic done clear
  C)
  Excreta                        done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer75)
  Sewage includes
  A)
  solid waste that goes down the drains done clear
  B)
  Liquid waste that goes down the drains done clear
  C)
  Plastics that are stuck in drains done clear
  D)
  Both (a) and (b) done clear
  View Solution play_arrow

• question_answer76)
  This kills the microbes that help to purify water
  A)
  Paints              done clear
  B)
  Motor oil done clear
  C)
  Medicines                    done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer77)
  By product of water treatment are
  A)
  Sludge              done clear
  B)
  Biogas done clear
  C)
  Sludge & Biogas          done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer78)
  Breeding place for mosquito flies which cause diseases are
  A)
  Oil                               done clear
  B)
  Open drain done clear
  C)
  Close tank                    done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer79)
  The organic part of solid material which is removed from sewage includes
  A)
  Animal excreta done clear
  B)
  Vegetable matter done clear
  C)
  Human excreta            done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer80)
  DIRECTIONS: Match column I with column Ii and select the correct answers using the code given below the columns.

  Column-I	Column-II
  (A) Organic waste	(p) Dysentry
  (B) Inorganic waste	(q) Phosphorus
  (C) Nutrient waste	(r) Tea leaves
  (D) Bacteria	(s) Meatals

  A)
  (A) \[\to \] (s),(B) \[\to \] (r),(C) \[\to \] (q),(D) \[\to \] (p) done clear
  B)
  (A) \[\to \] (r),(B) \[\to \] (s),(C) \[\to \] (p),(D) \[\to \] (q) done clear
  C)
  (A) \[\to \] (r),(B) \[\to \] (s),(C) \[\to \] (q),(D) \[\to \] (p) done clear
  D)
  (A) \[\to \] (q),(B) \[\to \] (r),(C) \[\to \] (p),(D) \[\to \] (s) done clear
  View Solution play_arrow

• question_answer81)
  DIRECTIONS: Match column I with column Ii and select the correct answers using the code given below the columns.

  Column-I	Column-II
  (A) Aeration	(p) Chlorien tablets are added
  (B) Chlorination	(q) Passes through layer of sand
  (C) Filtration	(r) Air is bubbled

  A)
  (A) \[\to \] (q),(B) \[\to \] (p),(C) \[\to \] (r) done clear
  B)
  (A) \[\to \] (p),(B) \[\to \] (q),(C) \[\to \] (r) done clear
  C)
  (A) \[\to \] (r),(B) \[\to \] (q),(C) \[\to \] (p) done clear
  D)
  (A) \[\to \] (r),(B) \[\to \] (p),(C) \[\to \] (q) done clear
  View Solution play_arrow

• question_answer82)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 1 Vermi Processing toilet has been tested in India and has been found to be a novel, low water use toilet. This process is simple and hygienic. What is used to treat the human waste in these toilets?
  A)
  Chemicals                    done clear
  B)
  Earthworms done clear
  C)
  Both (a) and (b)           done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer83)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 1 Vermi Processing toilet has been tested in India and has been found to be a novel, low water use toilet. This process is simple and hygienic. What is the product obtained from processing of human excreta?
  A)
  Cow dung cake            done clear
  B)
  Vermi cake done clear
  C)
  Fruit cake                    done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer84)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 1 Vermi Processing toilet has been tested in India and has been found to be a novel, low water use toilet. This process is simple and hygienic. Which of the following is a better housekeeping practice?
  A)
  Throwing oils down the drain done clear
  B)
  Excreting in the open done clear
  C)
  Using Vermi toilets done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer85)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 There are various steps involved in the treatment of polluted water before it can be made fit for human consumption. What is the first step involved in treatment of polluted water?
  A)
  Chlorination                done clear
  B)
  Aeration done clear
  C)
  Filtration                      done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer86)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 There are various steps involved in the treatment of polluted water before it can be made fit for human consumption. Which is the second step?
  A)
  Chlorination                done clear
  B)
  Aeration done clear
  C)
  Filtration           done clear
  D)
  Flocculation done clear
  View Solution play_arrow

• question_answer87)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 There are various steps involved in the treatment of polluted water before it can be made fit for human consumption. Why is chlorine tablet added?
  A)
  To kill germs                done clear
  B)
  To remove dirt done clear
  C)
  Both (a) and (b)           done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer88)
  DIRECTIONS: The questions in this segment, consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): In a WWTP, waste water is y? passed through bar screens, where large objects are removed. Reason (R): Dried sludge is used as a manure returning organic matter, water and nutrients to the water
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer89)
  DIRECTIONS: The questions in this segment, consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Poor sanitation and contaminated drinking water is the cause of large number of diseases. Reason (R): Where underground sewerage systems and refuse disposal systems are not available, the low cost on-site sanitation system can be adopted.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer90)
  DIRECTIONS: The questions in this segment, consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion A: We should not excrete in the open Reason R: Poor sanitation and contaminated water cause a number of diseases.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer91)
  DIRECTIONS: The questions in this segment, consists of two statements, one labeled as "Assertion A" and the other labeled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion A: Soft toys, used tea leaves, paints and oils should not be thrown in the drain. Reason R: These wastes choke the drain and do not allow free flow of oxygen thus hampering the degradation process.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer92)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Wastes that originates from industrial and commercial organizations are called sludge. (ii) House waste that comes from kitchen is called food waste. (iii) Sewage waste does not cause water pollution.
  A)
  Statements (i) and (iii) are incorrect but (ii) is correct. done clear
  B)
  Statements (i) and (ii) are incorrect but (iii) is correct. done clear
  C)
  All statements are correct. done clear
  D)
  All statements are incorrect. done clear
  View Solution play_arrow

• question_answer93)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Waste water is treated in a sewage treatment plant. (ii) Cleaning of water is a process of removing the pollutants before polluted water is reused. (iii) There are organic as well as inorganic impurities in water.
  A)
  Statements (i) and (iii) are incorrect but (ii) is correct. done clear
  B)
  Statements (i) and (ii) are incorrect but (iii) is correct. done clear
  C)
  All statements are correct. done clear
  D)
  All statements are incorrect. done clear
  View Solution play_arrow

• question_answer94)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) The decade 2015-2025 is declared as the international decade for action on "Water for Life" by UN General Assembly (ii) March 25 is celebrated as the World Water Day (iii) In this decade efforts will be made to reduce by half the number of people who do not have access to safe drinking water.
  A)
  Statements (i) and (iii) are incorrect but (ii) is correct. done clear
  B)
  Statements (i) and (ii) are incorrect but (iii) is correct. done clear
  C)
  All statements are correct. done clear
  D)
  All statements are incorrect. done clear
  View Solution play_arrow

• question_answer95)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) The inorganic impurities present in waste water are herbicides, pesticides, oil etc. (ii) The organic impurities are phosphates, metals, nitrates etc. (iii) There are no germs/bacteria present in waste water.
  A)
  Statements (i) and (iii) are incorrect but (ii) is correct. done clear
  B)
  Statements (i) and (ii) are incorrect but (iii) is correct. done clear
  C)
  All statements are correct. done clear
  D)
  All statements are incorrect. done clear
  View Solution play_arrow

• question_answer96)
  Why are bar screens used?
  A)
  To remove germs done clear
  B)
  To remove sand and grit done clear
  C)
  To remove cans, plastics, napkins etc. done clear
  D)
  To remove oil and grease done clear
  View Solution play_arrow

• question_answer97)
  What is the use of skimmer?
  A)
  It removes sand done clear
  B)
  It removes oil and grease done clear
  C)
  It helps in settling solid wastes done clear
  D)
  It is used as a filter done clear
  View Solution play_arrow

• question_answer98)
  What are the products of waste water treatment system?
  A)
  Sludge              done clear
  B)
  Biogas done clear
  C)
  Both a and b    done clear
  D)
  Vermi cakes done clear
  View Solution play_arrow

• question_answer99)
  What is clear water known as?
  A)
  Clarified water done clear
  B)
  Polluted water done clear
  C)
  Freshwater                   done clear
  D)
  Slurry done clear
  View Solution play_arrow