MCQs on Water Pollution and Noise Pollution

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1. : The minimum value of DO required for water to be pure is:



2. : Which value of COD will indicate more polluted water?



3. : Biodegradable pollutant is:



4. : Water is often treated with chlorine to:



5. : Permanent hardness of water is due to



6. : Temporary hard water is softened on industrial scale by adding



7. : Permanent hard water is softened by addition of



8. : Water pollution is due to



9. : Water is often treated with chlorine to



10. : The presence of which in drinking water is responsible for mottling of teeth?



11. : Which water requires zero hardness?



12. : Which process is not physical in nature?



13. : Which is not a physical characteristic of water?



14. : Which is not a chemical characteristic of water?



15. : Which is not a biological characteristic of water?



16. : Which compounds have fishy odor?



17. : Which oxidizing agent is aidful and used in COD test?



18. : Ground water is threatened with pollution from which kind of wastes?



19. : Which statement is not true regarding harmful effects of ground water pollution?



20. : Which statement is not related with the effect of thermal pollution?



21. : Which statement is not true regarding radioactive pollutants?



22. : Which techniques are aidful and used for minimizing water pollution?



23. : The expected specific waste of food industry is



24. : The expected specific wastes of textile industry is



25. : Which of the following is the expected specific waste of paper and allied products industry?



26. : Which disposal method is aidful and used for municipal wastes?



27. : Which of the following is the Chief source of water and soil pollution?



28. : Eutrophication is process which involves ______



29. : Which cause pollution?



30. : Disease caused by eating fish found in water contaminated with industrial waste having mercury is



31. : Maximum desirable concentration of fluorides according to international standard is



32. : Fish die in water bodies polluted by sewage due to Which of the following?



33. : Drained sewage has B.O.D.



34. : Which is a mode of controlling pollution in big cities?



35. : Domestic waste mostly constitutes



36. : Detergents are known to pollute rivers and water ways. However, detergents can be made biodegradable and pollution free by taking



37. : Which factors aid to measure quality of water?



38. : In the purification of portable water the coagulant aidful and used is:



39. : Which statements is not related with principal requisites of water for industrial purposes?



40. : Which of the following is the water that easily forms a lather of films and froths when agitated with a soap solution?



41. : Which of the following is the water that does not form a lather of films when agitated with a soap solution?



42. : BOD refers to:



43. : Phosphate pollution is caused by:



44. : Which substance not present in acid rain?



45. : Water pollution is mainly due to which?



46. : COD refers to:



47. : Spraying of DDT produces pollution of:



48. : Fluorosis, the bone disease, is caused by the presence of:



49. : The hardness of water is because of the presence of dissolved soluble salts of:



50. : Which statement is not true regarding hardness of water?



51. : Temporary hardness of water is due to:



52. : Which environmental problem could lead to a rise in sea level?



53. : Which of following is not a type of pollution for water bodies?



54. : EPA stands for?



55. : ISO stands for?



56. : Which pollutants does not leave a residue?



57. : In plant noise control, which method is aidful and used for reducing noise?



58. : The maximum noise level at which a man can work for hours is:



59. : The unit of sound pressure level is:



60. : The range of sound pressure for uncomfortable level is:



61. : Which is non-auditory effect of noise on human body?



62. : Which is/are non-point source(s) of water pollution?



63. : Which is/are source(s) of water pollution?



64. : Which is/are causes of eutrophication?



65. : Which statements is/are true with regard to the effect of eutrophication?



66. : Which steps is/are involved in the primary treatment of wastewater?



67. : Which materials is/are POP?



68. : Which materials is/are POP?



69. : Which molds secrete aflatoxins which are poisonous and cancer causing chemicals?



70. : Which steps is/are involved in the secondary treatment of wastewater?



71. : The dissolved organic matter of the wastewater is removed by biological process involving bacteria. This step is related to which treatment of wastewater:



72. : Which treatment is the best for degradation of organic/colloidal matter of wastewater?



73. : Tertiary treatment is generally aidful and used to treat which?



74. : Which is/are causes of soil/land pollution?



75. : Which treatment is/are effective in controlling soil/land pollution?



76. : Which statements is/are true regarding green chemistry?



77. : Which statements is/are true regarding green chemistry?



78. : Which statements is/are true regarding green chemistry?



79. : Which materials is/are carcinogen?



80. : The range of sound pressure which is painful is:



81. : Human hearing is sensitive to frequency in the range of about:



82. : A high frequency sound has frequency:



 

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