Q21. Which process is used to treat sewage biologically?
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Q22. Water hardness is caused mainly by:
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Q23. What is the main source of suspended solids in wastewater?
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Q24. Bioaccumulation refers to:
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Q25. The term "eutrophication" means:
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Q26. Which device measures particulate matter in the air?
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Q27. The major greenhouse gas emitted from biomass burning is:
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Q28. Noise pollution is primarily measured in:
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Q29. Which of the following is a common water treatment method to remove pathogens?
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Q30. The term "biochemical oxygen demand" (BOD) indicates:
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Q31. Which of the following pollutants causes photochemical smog?
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Q32. The function of scrubbers in air pollution control is to:
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Q33. Which process describes conversion of pollutants using microorganisms?
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Q34. Fluoride contamination in water is treated by:
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Q35. Which pollutant is responsible for global warming besides CO2?
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Q36. Effluent treatment plants are typically used in:
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Q37. Sedimentation basins are designed to:
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Q38. The pH scale measures:
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Q39. Anaerobic bacteria in wastewater treatment:
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Q40. Minimum dissolved oxygen required to sustain aquatic life is approximately:
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