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MCQs

Total Questions : 90 | Page 4 of 9 pages
Question 31. The intermittent sand filters have better BOD removal efficiency than trickling filters.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 32. The filter material used in contact bed is ___________
  1.    Sand
  2.    Stone ballast
  3.    Gravel
  4.    Fine sand
 Discuss Question
Answer: Option B. -> Stone ballast
Answer: (b).Stone ballast
Question 33. How many types of trickling filters are used in sewage treatment?
  1.    6
  2.    5
  3.    3
  4.    2
 Discuss Question
Answer: Option D. -> 2
Answer: (d).2
Question 34. Which of the following is called as contact bed?
  1.    Primary clarifier
  2.    Secondary clarifier
  3.    Contact filter
  4.    High rate digester
 Discuss Question
Answer: Option C. -> Contact filter
Answer: (c).Contact filter
Question 35. The depth of the filter media of intermittent filter is ___________
  1.    45cm
  2.    60cm
  3.    20cm
  4.    25cm
 Discuss Question
Answer: Option B. -> 60cm
Answer: (b).60cm
Question 36. The dewatered sludge cannot be disposed by ___________
  1.    Composting
  2.    Heat drying
  3.    Acid fermentation
  4.    Incineration
 Discuss Question
Answer: Option C. -> Acid fermentation
Answer: (c).Acid fermentation
Question 37. In which of the following process, the sludge is dried and disposed in land?
  1.    Centrifugation
  2.    Drying lagoon
  3.    Drying bed
  4.    Vacuum filter
 Discuss Question
Answer: Option C. -> Drying bed
Answer: (c).Drying bed
Question 38. Which of the following is not suitable for dewatering of raw sludge?
  1.    Centrifugation
  2.    Drying lagoon
  3.    Drying bed
  4.    Vacuum filter
 Discuss Question
Answer: Option B. -> Drying lagoon
Answer: (b).Drying lagoon
Question 39. Which of the following is not a part of dewatering process?
  1.    Drying bed
  2.    Air flotation
  3.    Vacuum filter
  4.    Drying lagoon
 Discuss Question
Answer: Option B. -> Air flotation
Answer: (b).Air flotation
Question 40. Which of the following is not a drying bed?
  1.    Wedwire beds
  2.    Artificial media
  3.    Filter press
  4.    Conventional sand
 Discuss Question
Answer: Option C. -> Filter press
Answer: (c).Filter press

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