Water Quality Monitoring MCQs

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1. : Which of the following is a primary parameter in water quality monitoring?





2. : The instrument commonly used to measure pH of water is:





3. : A Secchi disk is used to measure:





4. : Which parameter is an indicator of organic pollution in water?





5. : COD (Chemical Oxygen Demand) measures:





6. : Which water quality parameter is most critical for aquatic life survival?





7. : High levels of nitrates in drinking water can cause:





8. : Which unit is commonly used for measuring turbidity?





9. : Which instrument measures electrical conductivity of water?





10. : High BOD levels in water indicate:





11. : TDS (Total Dissolved Solids) in water is measured in:





12. : The parameter that measures salt concentration in water is:





13. : Which test is used to detect fecal contamination in water?





14. : Which bacteria is used as an indicator of water pollution?





15. : Which gas is most important in determining water quality for fish?





16. : Alkalinity in water refers to:





17. : The ideal pH range of drinking water is:





18. : Which heavy metal is commonly tested in water due to its toxicity?





19. : DO (Dissolved Oxygen) is measured in:





20. : Which instrument is used to measure turbidity?





21. : Eutrophication of water bodies is mainly caused by:





22. : Which method is used to measure chlorophyll concentration in water?





23. : Which gas increases in polluted water due to decomposition of organic matter?





24. : Which of the following is a biological parameter of water quality?





25. : High turbidity in water affects:





26. : Which index integrates multiple water parameters to give overall quality?





27. : Which toxic element in groundwater is associated with skin cancer?





28. : The permissible limit of fluoride in drinking water is:





29. : Thermal pollution of water is mainly caused by:





30. : Which water quality parameter indicates hardness?





31. : Which is a physical parameter of water quality?





32. : Eutrophication often leads to:





33. : Which method is used to measure DO (Dissolved Oxygen) in water?





34. : Excess fluoride in water can lead to:





35. : Which form of nitrogen indicates sewage pollution in water?





36. : Which water quality parameter is crucial for photosynthesis in aquatic plants?





37. : The process of water becoming enriched with nutrients and leading to oxygen depletion is called:





38. : Hardness of water is expressed in:





39. : Which of the following is used to measure salinity in seawater?





40. : The permissible limit of arsenic in drinking water (WHO guideline) is:





41. : High chloride concentration in water usually indicates:





42. : The main source of nitrate pollution in water is:





43. : Which metal in water is associated with Itai-Itai disease?





44. : Dissolved Oxygen (DO) levels below 4 mg/L generally indicate:





45. : Which instrument is commonly used for on-site multiparameter water quality testing?





46. : Total coliforms in water include:





47. : Which parameter is NOT a biological indicator of water quality?





48. : Groundwater contamination by arsenic is most common in:





49. : Which method is used to determine COD (Chemical Oxygen Demand)?





50. : The ultimate goal of water quality monitoring is:





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